内燃机专业英语2

发动机分类1 往复式内燃机reciprocating internal combustion engine2 化油器式发动机carburetor engine3 转子发动机rotary engine4 旋轮线转子发动机rotary trochoidal engine5 二冲程发动机two-stroke engine6 四冲程发动机four-stroke engine7 增压式发动机supercharged engine8 风冷式发动机air-cooled engine9 油冷式发动机oil-cooled engine10 水冷式发动机water-cooled engine11 自然进气式发动机naturally aspirated engine12 煤气机gas engine13 液化石油气发动机liquified petroleum gas engine14 柴油煤气机diesel gas engine15 多种燃料发动机multifuel engine16 石油发动机hydrocarbon engine17 双燃料发动机duel fuel engine18 热球式发动机hot bulb engine19 多气缸发动机multiple cylinder engine20 对置活塞发动机opposed piston engine21 对置气缸式发动机opposed-cylinder engine22 十字头型发动机cross head engine23 直列式发动机in-line engine24 星型发动机radial engine25 筒状活塞发动机trunk-piston engine26 斯特林发动机stirling engine27 套阀式发动机knight engine28 气孔扫气式发动机port-scavenged engine29 倾斜式发动机slant engine30 前置式发动机front-engine31 后置式发动机rear-engine32 中置式发动机central engine33 左侧发动机left-hand engine34 右侧发动机right-hand engine35 短冲程发动机oversquare engine36 长冲程发动机undersquare engine37 等径程发动机square engine38 顶置凸轮轴发动机overhead camshaft engine39 双顶置凸轮轴发动机dual overhead camshaft engine40 V形发动机V-engine41 顶置气门发动机valve in-head engine42 侧置气门发动机side valve engine43 无气门发动机valveless engine44 多气门发动机multi-valve engine45 卧式发动机horizontal engine46 斜置式发动机inclined engine47 立式发动机vertical engine48 W形发动机w-engine49 I形发动机I-engine50 L形发动机L-engine51 F形发动机F-engine52 原机Engine prototype发动机性能53 二冲程循环two-stroke cycle54 四冲程循环four-stroke cycle55 狄塞尔循环diesel cycle56 奥托循环otto cycle57 混合循环mixed cycle58 定容循环constant volume cycle59 工作循环working cycle60 等压循环constant pressure cycle61 理想循环ideal cycle62 热力循环thermodynamic cycle63 冲程stroke64 活塞行程piston stroke65 长行程long stroke66 上行程up stroke67 下行程down stroke68 进气行程intake stroke69 充气行程charging stroke70 压缩行程compression stroke71 爆炸行程explosion stroke72 膨胀行程expansion stroke73 动力行程power stroke74 排气行程exhaust stroke75 膨胀换气行程expansion-exchange stroke76 换气压缩行程exchange-compression stroke77 上止点top dead center(upper dead center)78 下止点lower dead center(bottom dead center)79 上止点前budc(before upper dead center)80 上止点后atdc(after top dead cetner)81 下止点前bbdc(before bottom dead center)82 下止点后abdc(after bottom dead center)83 排气量displacement84 发动机排量engine displacement85 活塞排量piston swept volume86 气缸容量cylinder capacity87 单室容量single-chamber capacity88 容积法volumetry89 压缩比compression ratio90 临界压缩比critical compression ratio91 膨胀比expansion ratio92 面容比surface to volume ratio93 行程缸径比stroke-bore ratio94 混合比mixture ratio95 压缩压力compression pressure96 制动平均有效压力brake mean effective pressure(bmep)97 空燃比air fuel ratio98 燃空比fuel air ratio99 燃料当量比fuel equivalence ratio100 扭矩torque101 单缸功power per cylinder102 升功率power per liter103 升扭矩torque per liter104 升质量mass per liter105 减额功率derating power106 输出马力shaft horsepower107 马力小时，马力时horsepower-hour108 总马力gross horse power109 总功率gross power110 净功率net power111 燃油消耗量fuel consumption112 比燃料消耗率specific fuel consumption113 空气消耗率air consumption114 机油消耗量oil consumption115 有效马力net horse power116 额定马力rated horse power117 马力重量系数horsepower-weight factor118 制动功率brake horse power119 制动热效率brake thermal efficiency120 总效率overall efficiency121 排烟极限功率smoke limiting horsepower122 功率曲线power curve123 机械损失mechanical loss124 机械效率mechanical efficiency125 有效热效率effective thermal efficiency126 充气系数volumetric efficiency127 过量空气系数coefficient of excess air128 适应性系数adaptive coefficient129 扭矩适应性系数coefficient of torque adaptibility130 转速适应性系数speed adaptive coefficient 131 强化系数coefficient of intensification132 校正系数correction factor133 换算系数conversion factor134 活塞平均速度mean piston speed135 发动机转速engine speed (rotational frequency) 136 充量（进气）charge137 旋转方向direction of rotation138 顺时针clockwise139 逆时针counter-clockwise140 左转left-hand rotation141 右转right-hand rotation142 发动机性能engine performance143 加载性能loading performance144 起动性能starting performance145 加速性能acceleration performance146 动力性能power performance147 排放性能emission performance148 燃油经济性Fuel economy149 排放Exhaust emissions150 大的燃烧噪声Large combustion noise151 预混合燃烧Premixed combustion152 扩散燃烧Diffusion combustion153 大的EGR率Heavy EGR154 推迟喷油时间Retarding the injection timing, 155 推迟喷油时间Delaying the fuel injection timing, 156 燃烧激振力Combustion excitation forces (CPL) 157 CO2排放Carbon dioxide (CO2) emissions158 温室气体Greenhouse gas159 热效率Thermal efficiency160 辅助涡流室Auxiliary swirl chamber161 黑烟Black smoke162 Nox氮氧化物Nitrogen oxides163 PM颗粒物Particulate matter164 EGR废气再循环Exhaust gas recirculation165 燃油供给系统The fuel injection system166 在低负荷区In the low load region167 气缸压力The cylinder pressure level168 曲轴转角The crank angle169 1/3倍频程1/3 octave band of the frequency 170 全负荷Full load171 部分负荷Partial load172 声压级Sound pressure level173 发动机扭矩Engine torque174 燃烧噪声Combustion noise175 机械噪声Mechanical noise176 涡轮增压的Turbocharged177 涡轮增压器Turbocharger178 着火燃迟期The ignition delay period179 喷油泵The fuel injection pump180 增压中冷柴油机Intercooled turbocharged diesel181 碳化氢Hydrocarbon (HC)182 进气管几何尺寸Intake port geometry183 水平轴Horizontal axis184 声功率Sound power level185 竖直轴Vertical axis186 辐射噪声Radiation noise187 发动机测功机engine dynamometer188 零负荷到中等负荷Idling to a medium-load189 振幅Amplitude190 气缸体振动Cylinder block vibration191 声压级Sound pressure level192 随着曲轴转角In relation to the crank angle193 最大汽缸压力The maximum cylinder pressure194 最大汽缸压力升高率The cylinder pressure gradient195 共轨系统Common-rail system196 可变喷嘴涡轮增压器variable nozzle turbocharger197 引导喷射pilot injection198 4气门DOHC系统4-valve DOHC system199 计算机辅助工程CAE computer-aided engineering200 固有噪声Born noise201 侧面挠度lateral bending202 排气岐管exhaust manifold203 进气岐管intake manifold204 交流发电机alternator205 齿轮箱gear case206 供油泵supply pump207 起动机starter208 共振频率resonance frequency209 气缸压力快速升高率the rapid rising rate of cylinder pressure 210 主喷量和主喷时间main injection volume, timing211 共轨油压fuel pressure in a common-rail212 放热率heat release ratio213 步进电机step-motor214 频谱图frequency spectrum map215 油膜oil film216 机械噪声mechanical noise217 识别identify218 变量variable219 隔离声音的传播途径Isolate sound transmission routes 220 衰减Attenuation221 半消声室Semi-ane choic chamber222 系数Coefficient223 正时带Timing belt224 台架实验Bench test225 气门驱动凸轮Valve-drive cam226 传递系数Transfer coefficient227 矢量vector228 气穴现象Cavitation229 微处理器microprocessor230 执行器actuator231 电控泵electronically controlled pump构造232 气缸盖cylinder head233 气缸体cylinder block234 整体铸造cast inblock (cast enblock)235 发动机罩engine bonnet236 气缸体加强筋engine block stiffening rib237 气缸cylinder238 示功图indicator chart/diagram239 缸体（转子机）stator240 缸径cylinder bore241 气缸体机架cylinder block frame242 配气机构箱valve mechanism casing243 气缸体隔片cylinder spacer244 气缸盖密封环cylinder head ring gasket245 气缸盖垫片cylinder head gasket246 气缸套cylinder liner(cylinder sleeve)247 干式缸套dry cylinder liner248 湿式缸套wet cylinder liner249 气缸水套water jacket250 膨胀塞expansion plug251 防冻塞freeze plug252 气缸壁cylinder wall253 环脊ring ridge254 排气口exhaust port255 中间隔板intermediate bottum256 导板guideway257 创成半径（转子机）generating radius258 缸体宽度（转子机）operating width259 燃烧室combustion bowl260 浅盆形缩口燃烧室shallow reentrant combustion chamber 261 主燃烧室main combustion chamber262 副燃烧室subsidiary combustion chamber263 预燃室prechamber264 涡流燃烧室` swirl combustion chamber265 分开式燃烧室divided combustion chamber266 涡流式燃烧室turbulence combustion chamber267 半球形燃烧室hemispherical combustion chamber268 浴盆形燃烧室bathtub section combustion chamber269 L 形燃烧室L-combustion chamber270 楔形燃烧室wedge-section combustion chamber271 开式燃烧室open combustion chamber272 封闭喷射室closed spray chamber273 活塞顶内燃烧室piston chamber274 爆发室explosion chamber275 燃烧室容积比volume ratio of combustion cahmber276 发动机托架engine holding frame engine277 动力机装置power unit278 直喷柴油机DI（direct-injection）diesel engine279 非直喷柴油机IDI（Indirect-injection）diesel engine 280 动力传动系power train281 连杆connecting rod282 油底壳oil pan283 活塞销piston pin284 气缸套cylinder bore285 凸轮齿cam gear286 空气室energy chamber287 气缸余隙容积cylinder clearance volume288 燃烧室容积combustion chamber volume289 气缸最大容积maximum cylinder volume290 压缩室compression chamber291 外径major diameter292 中径pitch diameter293 内径minor diameter294 径向间隙radial clearance295 两极调速器limiting_speed governor296 特性297 空转特性no load characteristics298 负荷特性part throttle characteristics（汽油机）load characteristics299 调速特性governor control characteristics300 万有特性mapping characteristics301 稳定调速率steady state speed governing rate工况302 怠速转速idling speed303 经济转速economic speed304 起动转速starting speed305 最低稳定工作转速lowest continuous speed with load306 最大扭矩转速speed at maximum torque307 最高空转转速maximum no load governed speed308 调速speed governing309 超速overspeed310 怠速idling311 转速波动率speed fluctuation rate312 工况working condition(operating mode)313 额定工况declared working condition314 变工况variable working condition315 稳定工况steady working condition316 空载no-load317 全负荷full load318 超负荷overload319 部分负荷part load320 怠速控制idling-speed control321 怠速工况idling condition322 起动工况starting condition323 起动转速cranking speed324 急减速工况abrupt decreasing condition325 加速工况accelerating condition326 驻车park327 调速Speed governing328 应急[跛行]模式limp-in mode排放329 Emission Standards in the EU 欧洲排放标准330 Fuel Quality 燃油质量331 Conformity of Production (COP) 生产一致性检测332 Fuel Consumption 燃油消耗333 Exhaust Emission Measurement 排放检测334 tailpipe 排气管335 Carbon monoxide 一氧化碳336 emissions of crankcase gases 曲轴箱燃油蒸发排放量337 Ageing test 耐久性试验338 EPEFE = European Program on Emssions, Fuels and Engine Technologies 欧洲的排放、燃油及发339 动机技术项目340 fuel properties 燃油质量341 Car Manufacturers 汽车制造商342 Impact of vehicle emissions on air quality 排放对空气质量的影响343 Cetane no. 十六烷值344 Evaporation characteristic 蒸发特性345 Sulfur-free Fuels 无硫燃油346 Testcycle 测试循环347 NEDC = New European Driving Cycle 新的欧洲标准测试循环348 Loading of charcoal canister 炭罐吸附349 preconditioning (PC) 预处理350 ESC=European steady state cycle 稳态循环351 ELR=European load response test 负荷烟度试验352 ETC=European transient cycle瞬态循环353 EEV=Enhanced Environmentally Friendly Vehicle 环境友好汽车354 ambient temperature 环境温度355 λ-sensor λ传感器356 exceeding emission limits) 排放超出限值357 Roadworthiness-Tests 道路适应性检测358at free acceleration 在自由加速工况下359 catalyst 催化转化器360 natural aspirated 自然吸气机型361 turbo charged 涡轮增压机型362 Emission Control Technologies 排放控制技术363 Three-way catalyst 三元催化转化器364 catalyst coating 催化转化器涂层365 secondary air injection 二次空气喷366 exhaust gas recirculation 排气再循环系统367 oxidation catalyst 氧化催化转化器368 piezo injection valves 压电式喷油阀369 PowerStations 发电机组370 Anthropogenic 人为因素371 ACEA = European Car Manufacturer Association 欧洲汽车制造商协会372 Target corridor 标范围373 Target value目标值374 CFV 临界流量文丘里管（Critical flow venturi）375 CLD 化学发光检测器（Chemiluminescent detector）376 FID 氢火焰离子化检测器（Flame ionisation detector）377 GC 气相色谱仪（Gas chromatograph）378 HCLD 加热式化学发光检测器（Heated chemiluminescent detector）379 HFID 加热式氢火焰离子化检测器（Heated flame ionisation detector）380 LPG 液化石油气（Liquefied petroleum gas）381 NDIR 不分光红外线分析仪（Non-dispersive infrared analyzer）382 NG 天然气（Natural gas）383 NMC 非甲烷截止器（Non-methane cutter）384 Rated power 额定功率。

Chapter 1 Enging types and their operation1.1 Introduction and historical perspective1．内燃机的目的是从蕴含在燃料中的化学能中得到机械动力。

．内燃机的目的是从蕴含在燃料中的化学能中得到机械动力。

The purpose of internal combustion engines is the production of mechanical power from the chemical energy contained in the fuel . 2．有别于外部燃烧机器，在内燃机中，能量是在机器内部燃烧或氧化燃料释放出来的。

化燃料释放出来的。

In In internal internal internal combustion combustion combustion engines engines engines ,as ,as ,as distinct distinct distinct from from from external external external combustion combustion engines, this energy is released by burning or oxidizing the fuel inside the engine. 3．功的转移，提供了需要的动力输出，发生在工作流体和机器的机械部件之间。

械部件之间。

The work transfers which provide the desired power output occur directly between between these these these working working working fluids fluids fluids and and and the the the mechanical mechanical mechanical components components components of of of the the engine. 4．实际上正是由于燃烧发生在机器做功部件内部才使它们的设计和运行特征从根本上有别于其他类型的机器。

Lesson 1marine 海运的，船用的 diesel 柴油，柴油机 internal 内部的 combustion 燃烧 ignite 点燃 inject 喷射 chamber 腔，室 principle 原理，原则 operation 工作，操作，运转，进程charge 装，充；充填物fresh新鲜的，淡(水)的 draw 抽吸 cylinder 气缸 compression 压缩 piston 活塞 fine 细小的，好的 spray 喷雾，(水，油)雾 burn 燃烧 rotate 旋转，回转 medium 中间的，介质 alternator 交流发电机 in turn 依次，轮流变成 turn into 变成 event 事件，过程 stroke 冲程，行程 separate (from) 分离，分开 exhaust 排出，耗尽；排气 combine (with) 结合，联合 inlet 进口，入口 scavenge 扫除；吹除 blow 吹，鼓风 residual 剩余的，残留的 value 价值，数值 injector 喷射器，喷油器 continue 继续(进行) revolution 转 theoretically 理论上地inefficient 效率低的，无效的advantage 优势，优点，长处 application 应用 propulsion 推进(装置) cause 引起；原因 force 迫使 crankshaft 曲铀propeller 螺旋桨，推进器 cycle 循环 consist (of) 由……组成fix 固定sequence 顺序，系列bottom dead centre (BDC) 下止点 top dead centre (TDC) 上止点 on board ship 在船上 r/min 转／分 reduction gear box 减速齿轮箱Lesson 2construction 结构 bedplate 机座 frame 机架 weld 焊接bolt 螺栓；用螺栓固定 seating 座，底座 liner (气缸)衬套 extend 延长，伸长 slot 槽，缝；开槽 opening 开口 height 高度 secure 固定 transverse 横向的chock 侧块， 楔型块 longitudinal 纵向的 test 放置，坐落 bearing 轴承cross 十字的，交叉的； stud 双头螺栓 cap 盖，帽 thrust 推，推力 block 块，体locate 位于，查出，找出integral 整体的flat 平的surface 表面mount 安装section 段，表面camshaft 凸轮轴enclose 包围，封闭casing 箱，外壳jacket 夹层，水套vertical 垂直的flange 法兰，翻边foremost 最前的expose 易露，露出edge 边缘drill 钻孔rotary 旋转的guide 导板，导向器，导向，引导insert 插入groove 槽，沟turn 车削，转动conical 锥形的screw 螺钉；用螺钉固定，拧入indicator 示功器cock 旋塞double 双层的cast iron 铸铁chain transmission 链条传动(机构) chromium 镀铬machine-turned 车削的，车制的approx 大约heat-resistant 耐热的Lesson 3recess 凹槽，凹座，凹入处 dowel 销钉pin 销子caulk 敛(铆)缝，嵌塞topmost 最上部narrow 狭窄的 diagonal 对角的，斜的overlap 重叠，搭接joint 接合，接头distributor 分配器slightly 轻微地round 圆的，使成圆形film (油)膜period 期间opposite 在……对面，与……相对 diameter 直径annular 环形的ensure 保证，担保assembly 组件，组装component 部件journal 轴颈shoe 滑靴，滑块horizontally 水平地adequate 足够的，充分的admit 允许进入，导入duct 管道scraper 刮子，刮油器shim 垫片，调整片thickness 厚度adjustment 调整，调节clearance 间隙appropriate 适当的channel 通道crankpin 曲柄销forge 锻造shrink 红套displace 错位，变位carrier ring 承磨环build-in 内装的，机内的，固定 top-bolt 锥体螺栓white metal 白合金telescope pipe 伸缩管，拉管fitted bolt 拂配螺栓Lesson 4survive 存在，生存strength 强度specific 明确的，详细而精确的 reject to 丢弃，排向…atmosphere 大气entrain 以气泡状态存在volume 量minimise 将……减到最少cavitation 气穴，气蚀proportion 比例，部分hopper 带支架的观察(镜，表) tundish 漏斗visual 看的，视觉的trumpet 喇叭nozzle 管口，喷嘴corrosion 腐蚀，锈overboard 向舷外merely 仅仅，只不过contact with 与……接触Lesson5maintenance 维护，保养select 选择among 在……之中affect 影响viscosity 粘度cetane 十六烷calorific 热(量)的，发热 sulphur 硫residue 残渣，残留物formation 形成product 产品，产物flash 闪光；闪亮gravity 重力content 内容，合量impurity 杂质depend 取决于，依靠residual 残余的available 可利用的，可获得的 embody 包括(合)有，使具体化 entirely 完全地，完整地 bunker 燃料舱distribute 分配various 各式各样的，多种多样 lag 包绕外层防护套 bunk 油舱duplex 双联的，双倍的 strainer 粗滤器remainder 储存storage 剩余，余额sediment 沉淀物buffer 缓冲器，贮存装置 spill 溢流regular 调节器climatic 气候的permit 允许meter 计量mechanism 机械机构plunger 柱塞barrel 桶，套桶sufficiently 充分地，足够地 atomize 将……喷成雾状 complexity 复杂，复杂性deposit 沉积物specification 规格，说明vanadium 钒sodium 钠asphaltene 沥青(烯)，沥育质 precipitate 使沉淀，沉淀物 aluminum 铝abrasive 有磨蚀的particle 颗粒silicon 硅oxide 氧化物nozzle 喷嘴catalytic 催化的clover 三叶草、苜蓿Lesson 6viscosity 粘度composition 组成storage 存储insoluble 不溶解的 impurity 杂质asphalt 沥青miscible 易混合的 filtration 过滤purifier 分水机 clarifier 分杂机conical 圆锥形的 periphery 外围，用边 perforate 穿(钻，冲)孔 cylindrical 圆柱形的 bowl 分离筒ancillary 辅助的centrifuge 离心分离机 accumulation 积聚consume 消耗agitation 搅动circumstance 环境，详情Lesson 7process 过程removal 排除blow 鼓风supercharge 增压atmosphere 大气的pressurize 增压，加压 electrically 电动地blower 鼓风机，增压器 density 密度turbine 涡轮机 compressor 压缩机essential 基本的，重要的 adequate 适当的，充分的 arrangement 布置，安排 escape 逃逸，溢出 differential 差别的，不同的 swirl 使……旋涡运动 adjacent 邻近的，接近的Lesson8successful 成功的 involve 涉及formation 形成considerable 相当的，大量的 exception 例外cleanse 清洗 carbonaceous 炭的detritus 磨屑 commercially 商业上 reversal 反向，变换 lubricator 注油器 injector 注油塞 quill 注油针 impinge 射到expose 暴露 residual 残渣lacquer 胶膜interface 影响，干扰 counteract 克服undesirable 不需要的formulate 配制impart 给予alkalinity 碱度，碱性 detergency 去垢能力property 性质feature 特性，特点 friction 摩擦assist 帮助，协助 rupture 破裂deterioration 变质，恶化filter 滤器centrifuge 离心分离机telescope pipe 伸缩套管，拉管Lesson9reservoir 容器(文中指空气瓶) ready 准备好的immediate 立即的drop 下跌，下落by means of 利用，用…方法 compressor 压缩机feature 功(能)，部件drainage 排放，排泄facility 设备stringent 严厉的，严格的interlock 连锁prevent 防止automatic 自动的pilot 引导的，控制的，先导的 lever 杆direct 直接的engage 啮合，从事further 进一步地 deposit 沉积物，沉淀 explosion 爆炸pipeline 管路，管系 occurrence 发生，事物 properly 适当地careful 谨慎的，小心的 attempt 企图；试图 effect 作用，影响，效果 trap 挡板，收集器 burst 爆发，冲破 disc 盘isolate 隔绝，绝缘 fusible 易熔的plug 塞，堵 melt 熔化，融化 guard 防护，防卫，护罩 possibility 可能性bursting cap 防爆帽Lesson 10instruction 指示，指令 sludge 渣，沉积物 purify 净化auxiliary 辅助的；辅助机械 operational (能)运行的，(可)操作的 extend 延长，扩展 approximately 接近，大约 obstruction 阻塞，妨碍，障碍物 uniformly 均匀地，一致地 viscosity 粘度hopper (观察)窗(漏斗) erosion 浸蚀，剥蚀，烧蚀 centistoke 厘斯(运动粘度单位) diaphragm 隔膜，振动膜 gland 密封(压盖) linkage 连接telegraph 车钟booster 增压泵Lesson 11remedy 排除(方法)，补救(措施) stick 粘住，卡住failure 失败，失灵delay 延迟，滞后watch 观察common 普通的，普遍的 result 由……引起，产生 diagram 图unequal 不相等的locate 找出，定位slacken 放松，减缓trace 查找，寻找responsibility 责任on the part of 在……方面Lesson 12medium 中等的，中间的 currently 当前地，现在地，流行地 rotational 转动的，旋转的 entirely 完全地trunk 筒形的，箱形的 rationalization 合理化layout 布置，设计 configuration 结构，布置alternatively 或者，另一个办法 twin 双的，对的 bank 排，列，组enclose 围起，围绕 column 架rigid 刚硬的，坚固的 sloping 倾斜的access 通道invariably 总是，不变地 solid 完整的，坚固的 multi-throw 多拐的robust 坚固的，结实的 develop 增进，扩大 imposing 施加的alignment 对中，成直线 exception 例外withdraw 放出waterjacket 冷却水套 aperture 孔，洞interpose 放入，插入 thickness 厚度ratio 比率(值) cylindrical 圆柱型的bore 孔tiny 细小的promote 促进，提高 sacrifice 牺牲，供奉 retain 保持，保留 porous 多孔的，能渗透的 in line 成行，直列 fixed centre type 固定中心式 marine type 船用型，中心可调式Lesson13bowl 盆，钵，盘toroidal 环形空腔，环形突起 rim 边缘，曲起accommodate 容纳splash 飞溅conduct 传导region 区域precisely 精确地，正确地 alloy 合金 boss 活塞销座孔endwise 在端部circlip 卡簧tin 锡flash 飞边indium 铟nip 压隙equivalent 相等量bridge 轴承盖accuracy 精度circular 圆形的tighten 上紧assist 援助，帮助 expel 驱逐，驱赶thermal 热的recondition 修理，使复原 frequent 频繁的accomplish 完成rocket 摇，臀杆tappet 挺杆，凸子，顶头 prop 支撑，维持 allowance 允许，裕量 appropriate 适当的Lesson 14extensive 广阔的，广泛的 overhaul 彻底检修，大修，解松(船)的绳索，essential 必要的，基本的 external 外部的 prudent 谨慎的 cut off 切断，断开 graduation 分度，刻度 reasonable 合理的，有益的 tolerance 容许量 pyrometer 高温计 register 记录，登记 ancillary 辅助的 symptom 症状，征兆 accompany 陪伴，结伴Lesson 15displacement 位移，排水量 centrifugal 离心的 rotary 旋转的 reciprocating 往复的 volute 涡形(的)，涡壳 turbine 涡轮，涡轮机 regenerative 再生的 periphery 外围，周边 mesh 啮合 helical 螺旋状的 void 空的，空旷的 slot 槽elliptical 椭圆的 swash 遮蔽，隐藏 tangential 无关的 moderate 中等的，适度的 attain 达到，获得Lesson 16boiler 锅炉distinct 截然不同的 furnace 炉子，炉膛 bent 弯的drum 鼓，锅筒 header 联箱 generate 产生 downcomer 下降管 natural 自然的 donkey 辅助的 installation 装置steam ship 蒸汽机船 motorship 内燃机船 composite 混合的，复合的 mounting 附件fitting 附件，配件 overpressure 超压presence 在场，出席 initially 初始地 purge 吹除，驱气 vapour 蒸汽 burner 燃烧器，喷灯 sample 样品 analysis 分析scum 泡沫，浮渣 soot blower 吹灰器 draught 强行通风 superheater 过热器 gradual 逐渐的 refractory 耐火的 ease 释放 recovery 回收，再生 saturated 饱和的 emulsion 乳化液，混合液exceed 超过extraction 提取物，提出物 economizer 省油(煤)器，节能器 combustible 可燃的secure 封闭，关紧 depressurize 减压liberate 释放funnel 烟囱intermediate port 中途港。

一．1.the internal combustion engine 内燃机2. a reciprocating engine 往复发动机3.exhaust emissions 废气排放4.fuel consumption燃料燃烧5.fuel economy 燃油经济性bustion chamber燃烧室7.hybrid-electric vehicle 混动汽车8.mass production大规模生产9.dual-fuel vehicle 双燃料汽车10.air-cooled engine 风冷式发动机二．1. A diesel engine compresses its cylinder air on its compresstion stroke before anyfuel enters the cylinder2.The internal combustion engine is the one most commonly used in theautomotive field.3.According to the fuel energy used,the internal combustion engines are alsodivided into gasoline engines,and diesel engine.4.The piston converts the potential energy of the fuel into the kinetic energy.5.The power production cycle consists of four strokes of the position in areciprocating engine.6.The engine is generally considered the “heart” of an automobile7.This four strokes cycle of piston within the cylinder is repeated time and again topush the vehicle foreard.8.There are actually various types of engines such an electric engines,steamengines,and internal combustion engines.1. compression ratio : the total volume divided bv the compression volume2. internal combustion engine : burning their fuel inside their cylinders3. engine : a heart of an automobile4. stroke : the movement of the piston within the cylinder and the distance of piston travel5. reciprocating : the up and down action of a piston in the cylinder6. gasoline : a mixture of flammable liquid hydrocarbons derived chiefly from crude petroleum.四．1.If you know something about ordinary gasoline engines, you will have notice thatdiesel engines, in many respects, work in the same way as gasoline engines.（柴油机的工作方式在很多方面和汽油机是一样的）2.The engine is the source of power that makes the car and the truck move.(使得汽车行驶)3.As it would not be reasonable to have to stop the engine every time it wasrequired to stop the car.(每次都到停车)4.Some of parts make the car move comfortable or better looking, but most ofthem are to make it run.(有些部件使得汽车更舒适或更美观)5.Not all of this heat can be used, and if allowed to remain in the engine, it wouldsoon destroy it.(如果让其热量保留在发动机中)一、1.gasoline engine 汽油机2.in low-speed driving condition在低速行车条件下3.achieve a variety of different objectives 达到各种不同的目的4.higher energy density高能量密度5.electric motor 电动机6.air conditioning空调装置7.regenerative braking 反馈制动8.power source动力源9.resource consumption 资源消耗10.dashboard display汽车仪表板显示二、1.The engine converts the expanding force of combustion into rotary force used topropel the vehicle.2.The gasoline engine and electric motor shut off automatically so that energy isnot wasted in idling.3.Clean cities uses hybrid electric vehicles as a way for coalitions to reducepetroleum consumption.4.Any vehicle without a transmission could be made to move but not smoothly.5.The electric motor applies resistance to the drive-train causing the wheels toslow down.6.The engine turns a high-speed generator, producing electricity.7.An intelligent power-control system determines the most efficient operation ofthe engine and energy storage system.8.If 10000 hybrid-electric vehicles were on the road rather than current standardvehicles, substantial reductions in emissions and fuel use would occur annually.1. transmission: an automotive assembly of gears by which power is transmitted from the engine to a driving axle.2. parking : to put or leave (a vehicle) for a time in a certain location.3. start : to set into motion , operation, or activity.4. battery : a single cell, such as a dry cell, that prouduces an electric current.5. braking : to reduce the speed of with or as if with a brake.四、1.We want hybrid-electric vehicle that reflect the spirit of the time and vehicleconcepts that express their individuality.(要能反映出时代精神)2.There are various types of engines such as electric motors, steam engines andinternal combustion engines.(电动机、蒸汽机和内燃机)3.The transmission is a speed and power changing device.(一个使速比变化的装置)4.Scientists have still been making efforts to concentrate the future developmentof engines on the three targets: reducing fuel consumption, lowering exhausted emissions, and reducing engine noise.(减少耗油量、降低废气排量以及降低发动机噪声)5.Hybrid system are increasingly becoming more prevalent in light-duty vehicles,but also in transit buses and other heavy-duty vehicles.(正日益变得更加流畅)6.We want hybrid-electric vehicle that reflect the spirit of the time and vehicleconcepts that express their individuality.(要能反映出时代精神)7.There are various types of engines such as electric motors, steam engines andinternal combustion engines.(电动机、蒸汽机和内燃机)8.The transmission is a speed and power changing device.(一个使速比变化的装置)9.Scientists have still been making efforts to concentrate the future developmentof engines on the three targets: reducing fuel consumption, lowering exhaustedemissions, and reducing engine noise.(减少耗油量、降低废气排量以及降低发动机噪声)10.Hybrid system are increasingly becoming more prevalent in light-duty vehicles,but also in transit buses and other heavy-duty vehicles.(正日益变得更加流畅)U5E11. The power train has two maan functions :it conveys powerfrom the engine to the wheels , and it changes the amount of torque2. The power train consists of an engine , a transmission ,a clutch , a drive shaft and differential3. The feature of a manual transmission is to deliver enginepower to the front wheels and rear wheels4. manual transmissions usually have five speeds , which means that the output shaft can rotate faster than the input5. There are several basic components in the clutch , suchas the flywheel , clutch disk , pressure plate , release bearing and linkage.6 Automatic transmissions are used not only in many rear-wheel-dnve and four-whe el-dnve ve- lcles, but In most front-wheel-dnve ones1.T2. T3. F4. F5. T6. FE21. manual transmission 手动变速器2. automatic transmission自动变速器3.planetary gear set 行星齿轮组4. Transaxle assembly驱动桥总成5. differential gear 差速器6. clutch pedal离合器踏板7.gearshift lever 变速杆8. release bearing分离轴承9. engine braking 发动机制动10.torque converter液力变矩器E31.If you’ve read about manual transmissions you know hat an engine is connectedto a transmission by way of a clutch.2.Cars with an automatic transmission have no clutch that disconnects thetransmission from the engine. Instead, they use an amazing device called a torque converter.3.One important function of the power train is to transmit the power of the engineto the wheels.4.The type of transmission ( manual or automatic) determines how the slip joint isconnected to the drive shaft.5.The clutch is located between the back of the engine and the front of thetransmission6.The face of the flywheel that touches the clutch disc is made of iron Even if theflywheel were aluminum , the face is iron.7.When the operator presses the clutch pedal ,the clutch release lever or fork .8.The clutch release bearing in most cases, is a ball bearing assembly with amachined face on one side.E41.clutch : any of various devices for engaging and disengaging two working engagingand disengaging two working parts of a shaft2.shaft: a long, generally cylindrical bar, especially one that rotates and transmits power3.transmission : a speed and power changing device4.gearshift : a mechanism for changing from one gear to another in a5.transaxle : an automotive part that combines the transmission and the differential and is used on vehicles with front-wheel drive6.flywheel: a heavy-rimmed rotating wheel used to minimize variations in angular velocityE51.The power is then carried from the engine through the power train to the car (通过传动系扒发动机传递到车轮) so that the wheels turn and the car moves.2.( 如果汽车变速器需要修理和更换)If your car transmission needs repairs orreplacement，you’ve come to the right phone.3.If you wanted a top speed of 80 km/h，then the gear ratio would be similar tothird gear ( 速比相近于3 挡) ,in most manual transmission cars .4.The torque converter does not require any regular maintenance or adjustments( 不要求定期维护或调整) ，but it may be possible to change the transmission fluid .5.The drive shaft can be. either open or enclosed , depending on the type of driveused (取决于所使用的驱动类型)U6E11 If your brakes can work properly , good brakes are essential for safety during dn、ruvtg.2. The disk brake is the best brake which is generally due to its simpler design , lighteri .elju Ind better braking performance.3 Brake linings used to be made maxnly of metals., because of ats heat absorbing propertlcb4Caliper is an important part, and it must be replaced if it indicates a sign of leak！ng lbfa_e Eutd. .lc5 The reason why we still have cars wlth drum brakes ls cheap.6.Drum brakes consist of some parts , such as a backing plate, brake shoes , brake dm. .1, wheel cylnder, return springs and an automatic or self-adjusting system.. brake shoes a brake1.T2. T3. F4. T5. T6. FE21.brake system制动系统2. the parking brake驻车制动器3.the service brake system行车制动系统4. the disk brake盘式制动器5.the hand brake 手制动6.the brake shoe制动蹄片7.drum brake 鼓式制动器8. brake pads制动块9brake performance 制动性能10. brake fluid制动液E31.The most vital factor in the running and control of the modem vehicles is thebreaking system.2.Brake fluid is a special liquid for use in a hydraulic brake system.3.The small forces applied to the brake pedal usually produce relatively largeforces.4.The rate of slowing down or retardation is governed by the speed of conversionof energy.5.Brake is a friction device for converting the power into heat by means of friction6.To decelerate and stop the moving automobile, the service brake are usuallyused.7.The brake lining of a friction maternal are secured to the shoes by brass8.The brake drum is mounted on the wheel hub.E41 brake : the means of bringing to rest a moving vehicle in a shortest possible distance.2 service brake : stop or slow a car by depressing and releasing the brake pedal.3 hand brake : keep the car from rolling on unleveled ground.4 drum brake : a backing plate , brake shoes , wheel cylinder , return springs etc.5 parking brake : hold the automobile at rest.E51.An automobile brake system is actually a friction device to change power intoheat（实际上就是一种把动力转变成热量的摩擦装置).2.Basically , automobile brakes are of two types: the mechanical brakes and thehydraulic brakes (机械制动器和液压制动)3.The most vital factor in the running and control of the modem vehicles is theautomobile brake system (汽车制动系统).4.There are two brake shoes at each wheel. The bottoms of the shoes are heldapart by an adjuster. The tops of shoes are held apart by a wheel cylinder（蹄片顶部由轮缸分别固定）5.Brake lines are steel tubing with copper and lead coating to prevent rust andcorrosion ( 以防锈蚀)U7EXERCISE 11. T2. F3. F4. F5. T6. F1 . The most important function of the suspension system ls to supply comfortable , safe nde cot- trol2. According to the article , we know that there are five basic types of spnngs used ln sus,eT"-sions ：coil spring , leaf spring , torsion bar spring , traction,barand air spnngn3. The disadvantage of a coil spring ls its compactness , lack of moving parts , and excellentweight supporting characteristics.4. According to e passage , leaf springs are often used on the front suspension of front drive vehtcles5. When the coil springs , leaf springs , torsion bar spring ,L air springs ls defected , thls couldd cause the car to bounce up and down without any control6. Shock absorber movement ls limited by forcing fluid , d which causes the shock absorber to causes the shock absorbercompress or extend at a slow rate.EXERCISE 21.suspension system 悬架系统2.front suspension system前悬架系3.air compressor 空气压缩机4.torque tube传递转矩管5.axle housing alignment 桥壳定位6.coil spring 螺旋弹簧7.lower control arm 下控制臂8.rebound clip缓冲夹9.traction bar 牵引杆10.control arm控制臂EXERCISE 31.The leaf springs or leaves. most commonly used tn automobiles is' made up ofseveral long plates ,2.Suspension refers to the use of the front and rear springs to suspend a vehicle ' srear springs to suspend a vehicle sprung weight3.Shock absorber are hydraulic restricting devices used to hmt the speed of springaction.4.The car frame is connected to the axles by springs which absorb road shock5.The coil springs is made from a length of steel rod wound Into a coil.6.The front-suspension system must allow the wheels to move up and down.7.In operations, the lower control arms pivot up and down , twisting the torsionbars spring.8.Rebound clips are place along the spnng to prevent separahon of the leaveswhen the spring rebounds.EXERCISE 41.coil spring : a round bar of spring steel wound into the shape of a coil2.leaf spring : several layers of spring steel stacked one upon the other3.torsion ba r : spring a long solid steel shaft held at one end to the suspension s control arm4.air spring : a rubber bag or bladder full of air5.shock absorber : a hydraulic device by forcing fluid through passages or orifices6 suspension : use of the front and rear spring to suspend a vehicleEXERCISE 51.We all Know that springs are the major component（弹簧是主要部件) .nautomobile suspension.2.The automobile suspension is one of the major automobile system (汽车的主要系统之一。

1、电器设备：electrical equipment2、铰接客车：articulated bus3、内燃机：internal combustion engine4、变矩器：torque converter5、差速器：differential gear6、传动轴：propeller shaft7、转向柱：steering column8、钢板弹簧：leaf spring9、螺旋弹簧：coil spring10、扭杆弹簧：torsion bar11、连杆：connection rod12、上止点：top read center13、下止点：bottom read center14、吸气行程：induction stroke15、做功行程：power stroke16、压缩行程：compression stroke17、排气行程：exhaust stroke18、有效容积：swept volume19、发动机排量：engine capacity20、转向系统：steering system21、传动系统：power train system22、制动系统：brake system23、车身：automobile body24、底盘：chassis25、发动机：engine26、电气系统：electrical system27、压缩比：compression ratio28、气缸体：cylinder block29、气缸盖：cylinder head30、顶置凸轮：overhead-cam31、灰铸铁：gray iron32、碳钢：carbon steel33、铝合金：aluminum alloy34、进气总管：internal manifold35、曲轴箱：crankcase36、活塞环（销）：piston ring（pin）37、切向力：tangential force38、径向力：radial force39、气缸壁：cylinder wall40、气缸筒：cylinder bore41、往复运动：reciprocating motion42、点火次序：firing order43、人造橡胶：elastomer44、合成橡胶：synthetic rubber 45、气门间隙：valve clearance46、凸轮挺赶：cam follower47、气门正时：valve timing48、进气门：intake valve49、排气门：exhaust valve50、电子式气阀控制：electronic valve control51、顶置凸轮轴：overhead camshaft52、齿轮带：cog-type belt1、有些零件使汽车更舒服或更美观，但其中大多数是使汽车行驶。

内燃机英语名词--------------------------------------------------------------------------------活塞式内燃机英语名词、术语(一)（GB1883 ）序号中文名词、术语英文名词、术语1 往复活塞式内燃机Reciprocating engine2 二冲程内燃机Two-stroke engine3 四冲程内燃机Four-strokeen gine4 汽油机Gasolineengine5 顶置气门汽油机Overhead-valve engine6 侧置气门汽油机Side-valvengine7 汽油喷射式汽油机Gasoline-injection engine8 顶置凸轮轴内燃机Overhead camshaft engine9 柴油机Dieselengine10 煤气机Gas engine11 柴油煤气机Gas-Diesel engine12 多种燃料内燃机Multi-fuel engine13 低转速柴油机Low-speed Dieselengine14 中转速柴油机Medium-speed Diesel engine15 高转速柴油机High-speedDieselengine16 增压柴油机Supercharged Diesel engine17 低增压柴油机Low-supercharged Diesel engine18 中增压柴油机Medium-supercharged Dieselengine19 高增压柴油机High-supercharged Dieselengine20 超高增压柴油机Superhigh supercharged Dieselengine21 废气涡轮增压柴油机Turbocharged Diesel engine22 机械增压柴油机Mechanical pressure-charged engine23 两级增压柴油机Two stage super-charged engine24 复合式柴油机Compound Dieselengine25 十字头式柴油机Crosshead Diesel engine26 船用挂机Outboardengine27 水冷内燃机Water-coolede ngine28 风冷内燃机Air-cooled engine29 单缸内燃机Single-cylindeenrg ine30 多缸内燃机Multi cylinder engine31 卧式内燃机Horizontalengine32 立式内燃机Vertical engine33 斜置式内燃机34 直列式内燃机In-line engine35 对置气缸内燃机Opposed-cylinder-type engine36 对动活塞内燃机Opposed-pistonengine37U 形内燃机U-pistonengine38V 形内燃机V-engine39W 形内燃机W-engine40X 形内燃机X-engine41 星形内燃机Radialengine42 ▽形内燃机▽-Type engine43 工字形内燃机工-type engine44 王字形内燃机王-type engine往复活塞式内燃机英语名词、术语(二)（GB1883 ）序号中文名词、术语英文名词、术语45 气缸直径Cylinderbore46 活塞行程Stroke 47 上止点Top dead centre48 下止点Bottom dead centre49 行程缸径比Stroke-borrea tio50 连杆比Ratio between crank radius andconnecting rod length 51 充量Charge52 工质Working medium53 进气行程Suctionstroke54 压缩行程Compression stroke55 膨胀行程Expansionstroke56 排气行程Exhauststroke57 换气-压缩行程（二冲程）Scavenging-compression stroke 58 膨胀-换气行程（二冲程）Expansion-scavengingstroke59 工作循环Working cycle60 扫气过程Scavenging61 直流扫气Uniflowscavenging62 回流扫气Loopscavenging63 横流扫气Crossscavenging64 扫气泵扫气Scavenging by blower65 曲轴箱扫气Crankcase scavenging66 活塞底泵扫气Under-piston pump scavenging67 进气温度Intaketemperature68 进气压力Intakepressure69 进气涡流Intakeswirl70 排气温度Exhaust-gastemperature71 排气背压Back pressure72 排气烟度Exhaust gas opacity73 充量系数Charging efficiency7474 残余废气系数Residual gas ratio75 扫气利用系数Coefficient of scavenging76 扫气漏失系数77 扫气系数Scavengingfactor78 压缩始点压力Compression beginning pressure79 压缩终点压力Compression end pressure80 压缩始点温度Compression beginning temperature81 压缩终点温度Compression end temperature82 最高燃烧温度Maximum combustion temperature83 膨胀终点温度Expansion end temperature84 膨胀终点压力Expansion end pressure85 平均压力增长率Mean rate of pressure increase86 放热速率Rate of heat release87 燃烧速率Burningvelocity88 火焰传播速度Rate of flame propagation89 表面点火Surfaceignition90 放热规律Regularity of heat release91 过量空气系数Excess air factor92 总过量空气系数Total excess air factor 93 气缸工作容积Piston swept volume 94 总排量Engine sweptvolume95 压缩多变指数Polytropic exponent of compression96 膨胀多变指数Polytropic exponent of expansion97 最高爆发压力Maximum cylinder pressure98 压力升高比Rate of explosion99 初期膨胀比Cut-offr ate100 后期膨胀比Expansionrate101 放热系数Coefficient of heat release102 热平衡Heat balance103 有效功的热当量Mechanical equivalent of heat104 排气热损失Exhaustloss105 冷却热损失Coolingloss106 热平衡余项损失Heat loss as residual term of the heatbalance107 示功图Indicator diagram 108 示功图丰满系数Diagram factor109 扫气过量空气系数Delivery ratio110 空燃比Air-fuerla tio111 扫气效率Scavengingefficiency112 低热值Lower calorificvalue113 空气利用率Rate of air utilization114 热量利用系数Coefficient of heat utilization115 压缩比Compression ratio116 有效压缩比Effective compression ratio117 分子变更系数118 指示功Indicatedwork119 平均指示压力Mean indicated pressure120 指示热效率Indicatedthermalefficiency121 指示热消耗率Indicated specific heat consumption122 工作过程Working process123 压缩空气瓶容量124 指示燃油消耗率Indicated specific fuel consumption125 燃油消耗率Specific fuel consumption126 燃油消耗量Fuelconsumption127 热消耗量Heat consumption128 机油消耗率Specific oil consumption129 机油消耗量Oilconsumption130 空气消耗量Airconsumption131 最低燃油消耗率Minimum specific fuel consumption132 进排气重叠角Valve overlap133 进气持续角Intake valve-opening time134 排气持续角Exhaust valve-opening time135 点火提前角Advance angle of ignition136 进气提前角Intake advance angle137 进气滞后角Intake retard angle138 排气提前角Exhaustadvanceangle139 排气滞后角Exhaust retard angle140 扫气持续角Scavenging port-opening time 141 燃烧持续期Combustion duration 142 滞燃期Ignitiolna g143 显然期Apparent combustion period144 后燃期Afterburning145 早燃Preignition146 回火Back fire147 爆燃Detonation148 工作粗暴Engineroughness149 发火顺序Firingorder150 正时Valve timing往复活塞式内燃机英语名词、术语(三)（GB1883 ）序号中文名词、术语英文名词、术语151 燃烧过程Combustion process152 油膜燃烧Film combustion153 空间燃烧Space combustion154 复合燃烧Compound combustion155 混合气形成Mixing156 废气净化Exhaust emission control157 雾化Atomization158 喷油速率Injection rate159 喷油规律Characteristic of fuel delivery160 喷油持续角Fuel injection period161 喷油延迟角Fuel injection lag162 供油提前角Deliverybeginning163 喷油提前角Fuel injection beginning164 换气过程Gas exchangeprocess165 配气相位Valve timing166 残余废气Residualgas167 增压Supercharging168 增压比Pressureratio169 气波增压Comprex supercharging170 增压压力Boostpressure171 废气涡轮增压Turbocharging172 机械增压Mechanicalsupercharging173 复合增压Two stagesupercharging174 定压增压Constantpressure175 脉冲增压Pulseturbocharginsgy stem 176 增压中冷Intercooling 177 增压度Degree ofcharging178 增压器出口温度Supercharger outlet temperature179 脉冲进气Impulse suction往复活塞式内燃机英语名词、术语(四)（GB1883 ）序号中文名词、术语英文名词、术语180 时间-面积值/角度-面积值Time area181 积炭Carbon deposit182 结胶Sticking183 敲缸Knock184 气阻Vapour lock185 燃烧室面容比Surface volume ratio186 燃烧室的挤流面积Squish area187 激冷效应Quenching188 燃料当量比Equivalenceratio189 L型燃烧室** Side valve combustion chamber190 楔形燃烧室** Wedge combustion chamber191 盆型燃烧室** Basin type chamber192 F型燃烧室** F-head type combustion chamber193 半球形燃烧室** Semispherical combustion chamber194 开式燃烧室* Open combustion chamber195 分开式燃烧室* Divided combustion chamber196 半开式燃烧室* Semi-divided combustion chamber197 涡流室燃烧室* Swirl chamber type198 预燃室燃烧室* Precombustion chamber type199 直接喷射燃烧室* Direct injection type chamber200* 主燃烧室Main combustion type chamber201* 球型燃烧室Spherical combustion chamber202* ω型燃烧室ωtype chamber203* 盆型燃烧室Dish type chamber204 层状充气Stratificehda rging205 挤压涡流Squishswirl206 螺旋进气道Spiralport207 切向气道Tangentialp ort注释：*指柴油机燃烧室，**指汽油机燃烧室。

1. accessory [əkˈsesəri] 附件2. atmosphere[ˈætməsfɪə(r)] 空气3. bare[beə(r)] 裸露4. bearing [ˈbeərɪŋ]轴承5. bedplate ['bedpleɪt] 机座6. blower[ˈbləʊə(r)] 压气机7. bolt[bəʊlt] 螺栓8. brake[breɪk] 刹车9. calorific[ˌkæləˈrɪfɪk] 热值10. camshaft[ˈkæmʃɑ:ft] 凸轮轴11. capacity[kəˈpæsəti] 电容12. cetane number [ˈsi:tein ˈnʌmbə]十六烷值13. cetane ['si:teɪn] 十六烷值14. charge [tʃɑ:dʒ] 充气15. combustion chamber [kəmˈbʌstʃənˈtʃeimbə] 燃烧室16. combustion[kəmˈbʌstʃən] 燃烧17. compress[kəmˈpres]压缩18. connect rod big end[kəˈnekt] [rɒd]连杆大端19. crank journal[kræŋk ˈdʒə:nl] 主轴颈20. crankshaft[ˈkræŋkʃɑ:ft] 曲轴21. crown [kraʊn] 活塞顶22. curve[kɜ:v] 曲线23. cylinder[ˈsɪlɪndə(r)] 气缸24. diesel[ˈdi:zl]柴油机25. drawbar ['drɔ:ˌbɑ:] 挂钩26. dynamometer[ˌdaɪnə'mɒmɪtə] 测功器27. eliminate[ɪˈlɪmɪneɪt] 排除28. exert [ɪgˈzɜ:t] 施加29. exhaust gas driven turbocharger[ɪgˈzɔ:st][gæs][ˈdrɪvn][ˈtɜ:bəʊtʃɑ:dʒə(r)] 废气涡轮增压器30. exhaust[ɪgˈzɔ:st] 排气31. fan[fæn] 风扇32. film[fɪlm] 油膜33. flame[fleɪm] 火焰34. frame[freɪm] 机架35. friction [ˈfrɪkʃn] 摩擦36. gallon[ˈgælən] 加仑37. generator[ˈdʒenəreɪtə(r)] 发电机114. frequency response [ˈfri:kwənsiriˈspɔns] 频率响应115. frequency responsecharacteristic [ˈfri:kwənsi riˈspɔns][ˌkærəktəˈrɪstɪk]频率响应特性116. Hall effect [ɪˈfekt] 霍耳效应117. Hall element [ˈelɪmənt] 霍耳元件118. dynamic response [daiˈnæmik riˈspɔns]动态响应119. eddy-current ['edi:k'ʌrənt]涡流120. eddy-currentdynamometer ['edi:k'ʌrənt] [ˌdaɪnə'mɒmɪtə] 电涡流测功器121. eddy-current testing ['edi:k'ʌrənt][ˈtestɪŋ]涡流检测122. eddy-current testinginstrument ['edi:k'ʌrənt][ˈtestɪŋ][ˈɪnstrəmənt] 涡流检测仪123. eddy-current thicknessgauge['edi:k'ʌrənt] [ˈθɪknɪs geidʒ]涡流测厚仪124. inductive transducer [inˈdʌktivtrænzˈdju:sə] 电感式传感器125. charge amplifier[tʃɑ:dʒˈæmpləˌfaɪə] 电荷放大器126. ammeter [ˈæmi:tə(r)] 电流表127. voltmeter[ˈvəʊltmi:tə(r)] 电压表128. chromatography [ˌkrəʊməˈtɒgrəfi] 色谱学129. chromatograph['krəʊmətəgrɑ:f]色谱法130. chromatogram[krəʊ'mætəˌgræm]色谱图131. chromatograph ['krəʊmətəgrɑ:f]色谱仪132. linear range[ˈlɪniə(r)][reɪndʒ]线性范围133. linear system [ˈlɪniə(r)] [ˈsɪstəm]线性系统134. natural frequency [ˈnætʃərəl ˈf ri:kwənsi]固有频率135. phase difference [feiz ˈdifərəns]相位差136. piezoelectric effect[paɪˌi:zəʊɪ'lektrɪk] [ɪˈfekt]压电效应137. piezoelectric accelerationtransducer [paɪˌi:zəʊɪ'lektrɪk] [əkˌseləˈreɪʃn][trænzˈdju:sə(r)] 压电式加速度传感器138. piezomagnetic effect[paɪi:zəʊmæg'netɪk] [ɪˈfekt]压磁效应139. pressure transducer [ˈpreʃətrænzˈdju:sə]38. gross [grəʊs] 毛重39. handle[ˈhændl]控制40. hold-over['həʊld'əʊvər] 遗留物41. horsepower[ˈhɔ:spaʊə(r)] 马力42. ignite[ɪgˈnaɪt]点火43. illustrate [ˈɪləstreɪt] 图示44. impose[ɪmˈpəʊz] 施加45. inhale[ɪnˈheɪl]进气46. initial[ɪˈnɪʃl]初始值47. injection [ɪnˈdʒekʃn] 喷射48. injector [ɪn'dʒektə] 喷油器49. intermittent [ˌɪntəˈmɪtənt]断续50. Internal combustion engine[inˈtə:nəl kəmˈbʌstʃən ˈendʒin] 内燃机51. intimate[ˈɪntɪmət] 宣布52. jacket [ˈdʒækɪt] 水套53. lever[ˈli:və(r)] 杠杆54. liner [ˈlaɪnə(r)] 气缸套55. list [lɪst] 清单56. load[ləʊd] 负荷57. major [ˈmeɪdʒə(r)]主体58. mean [mi:n] 均值59. measure [ˈmeʒə(r)] 测量60. mixing['mɪksɪŋ]混合61. offer[ˈɒfə(r)] 提供62. offset[ˈɒfset] 偏移63. opposed [əˈpəʊzd] 对置64. overlap[ˌəʊvəˈlæp] 重叠65. overload [ˌəʊvəˈləʊd] 过载66. particular [pəˈtɪkjələ(r)] 特色67. peak[pi:k] 峰值68. pilot [ˈpaɪlət] 引导69. pin[pɪn] 销70. piston ring[ˈpistən riŋ]活塞环71. piston[ˈpɪstən] 活塞72. plier['plaɪə] 钳子73. propeller [prəˈpelə(r)] 螺旋桨74. puzzle[ˈpʌzl] 疑惑75. radius [ˈreɪdiəs] 半径76. recommend[ˌrekəˈmend] 推荐77. represent[ˌreprɪˈzent] 代表78. reservoir [ˈrezəvwɑ:(r)] 瓶79. resistance [rɪˈzɪstəns] 电阻压力传感器140. relative error[ˈrelətiv ˈerə]相对误差141. sampling[ˈsɑ:mplɪŋ]采样142. sampling frequency[ˈsɑ:mplɪŋ][ˈfri:kwənsi]采样频率143. sampling period [ˈsɑ:mplɪŋ] [ˈpɪəriəd]采样周期144. sampling rate [ˈsɑ:mplɪŋ][reɪt]采样率145. sound field [saund fi:ld]声场146. sound intensity [saund inˈtensiti]声强147. sound intensity level [saund inˈtensiti ˈlevl]声强级148. sound level [saund ˈlevl]声级149. sound pressure [saund ˈpreʃə]声压150. sound pressure level[saund ˈpreʃəˈlevl]声压级151. sound power level[saund ˈpauəˈlevl]声功率级152. span[spæn]量程153. strain[streɪn]应变154. strain effect[strein iˈfekt]应变155. strain gauge[strein geidʒ]应变片156. strain-gauge-typetransducer [streɪn] [geɪdʒ][taɪp][trænzˈdju:sə(r)] 应变式传感器157. step response[step riˈspɔns]阶跃响应158. step response time [step riˈspɔns taim]阶跃响应时间159. thermal radiation [ˈθə:məl ˌreidiˈeiʃən]热辐射160. thermocouple ['θɜ:mə'kʌpl]热电偶161. thermocouple wires thermocouple wires ['waɪəz]热电偶丝162. thermodynamic scale [ˈθə:məudaiˈnæmik skeil]热力学温标163. threshold value [ˈθreʃhəuld ˈvælju]阈值164. time constant[taim ˈkɔnstənt]时间常数165. transducer [trænzˈdju:sə(r)]传感器166. transfer function[trænsˈfə: ˈfʌŋkʃən]传递函数167. transient [ˈtrænziənt]瞬态168. steady state [ˈstedi steit]稳态169. zero drift [ˈziərəu drift]零点漂移170. signal-to-noise ratio[ˈsɪgnəl] [tə]80. revolution[ˌrevəˈlu:ʃn] 转81. ring[rɪŋ]活塞环82. rod [rɒd] 连杆83. satisfactory [ˌsætɪsˈfæktəri] 安全84. scavenge [ˈskævɪndʒ] 扫气85. seal [si:l] 密封86. silencer[ˈsaɪlənsə(r)] 消音器87. skirt[skɜ:t] 活塞裙88. specifications [spesɪfɪ'keɪʃnz]说明书89. spray [spreɪ] 喷洒90. stroke [strəʊk] 冲程91. term[tɜ:m] 术语92. torque [tɔ:k] 扭矩93. travel [ˈtrævl]传播94. turbocharger [ˈtɜ:bəʊtʃɑ:dʒə(r)]增压器95. twist [twɪst] 扭曲96. vaporization [,veipərai'zeiʃən]蒸发97. variable[ˈveəriəbl] 变量98. vehicular [vəˈhɪkjələ(r)] 车辆99. viscosity[vɪ'skɒsətɪ] 粘度100. weld[weld] 焊接101. absolute error [ˈæbsəlju:tˈerə] 绝对误差102. amplitude [ˈæmplɪtju:d]振幅，幅值103. atmospheric pressure [ˌætməˈsferɪk ˈpreʃə]气压104. sensor[ˈsensə(r)]传感器105. biosensor[bi:əʊ'sensər] 生物传感器106. calibration [ˌkælɪˈbreɪʃn]校准，标定107. capacitivetransducer [kə'pæsɪtɪv] [trænzˈdju:sə(r)]电容传感器108. charge amplifier [tʃɑ:dʒˈæmpləˌfaɪə] 电荷放大器109. damping['dæmpɪŋ]阻尼110. damping coefficient [ˈdæmpiŋ ˌkəʊəˈfɪʃənt] 阻尼系数111. delay time [diˈlei taim]滞后时间112. deviation [ˌdi:viˈeɪʃn] 偏差113. error of indication [ˈerə(r)][ˌɪndɪˈkeɪʃn]示值误差[nɔɪz] [ˈreɪʃiəʊ]信噪比171. sensing element [sensɪŋ][ˈelɪmənt]敏感元件172. sensitivity [ˌsensəˈtɪvəti]灵敏度173. sensitivity characteristic [ˌsensɪˈtɪvɪti: ˌkæriktəˈristik]灵敏度特性174. sensitivity drift[ˌsensɪˈtɪvɪti: drift]灵敏度漂移175. sensitivity error[ˌsensɪˈtɪvɪti: ˈerə]灵敏度误差176. sensitivity coefficient [ˌsensɪˈtɪvɪti:ˌkəʊəˈfɪʃənt]灵敏度系数177. response[rɪˈspɒns]响应178. response characteristic[riˈspɔnsˌkæriktəˈristik]响应特性179. response speed [riˈspɔns spi:d]响应速度180. response time[riˈspɔns taim]响应时间181. on -line[ɒn] [laɪn] 在线182. on-line processing[ɒn] [laɪn][ˈprəʊsesiŋ]在线处理183. on-line equipment [ɒn] [laɪn] [ɪˈkwɪpmənt] 在线设备184. on-line real-time processing[ɒn] [laɪn] [ˈri:əl][taɪm] [ˈprəʊsesiŋ]在线实时处理185. in line [in lain]在线186. off line [ɔf lain]离线187. real time [riəl taim]实时188. random error[ˈrændəm ˈerə]随机误差189. systematic error[ˌs istəˈmætik ˈerə]系统误差190. noise [nɔɪz]噪声191. vibration[vaɪˈbreɪʃn]振动192. vibration analyzer[vaɪˈbreɪʃn] ['ænəˌlaɪzə]振动分析仪193. infrared spectrum [ˈinfrəˈred ˈspektrəm]红外光谱194. infrared fiber [ˌɪnfrəˈred] ['faɪbə]红外光纤195. hysteresis error [ˌhistəˈri:sis ˈerə]滞后误差196. hysteresis [ˌhɪstə'ri:sɪs]滞后197. intelligent sensor [inˈtelidʒənt ˈsensə]智能传感器198. flow rate [fləu reit]流量199. flowmeter ['fləʊmi:tə]流量计200. scale[skeɪl]标度尺。

煤矿安全专业英语1．mine ventilation 矿山通风internal combustion engine 内燃机dilute 冲淡, 变淡, 变弱, 稀释contaminant 污染物noxious 有害的exhaust shaft 出风井colliery 煤矿sink 挖掘suction 吸入, 吸力, 抽气, 抽气机, 抽水泵, 吸引canary [动]金丝雀, 淡黄色trap door 通风门trapper 设阱捕兽者, [矿]矿井风门开关管理员moisture content 湿度thermodynamic 热力学的, 使用热动力的head 液压，气压：液体或气体产生的压力；压差static energy 静压能velocity energy 动能potential energy 位能、势能incompressible fluid 不可压缩流体3．Face 工作面blind 不通的（巷道）entry 水平巷道，主平巷（美国烟煤地区名称）；通向地面的通风巷道（煤）active entry 生产煤巷adit entry 平硐air entry 风巷crosscut 石门brattice 风障auxiliary fan 局部通风机open连通的air leakage 漏风heading 平巷blowing (or blower） system 压入式系统exhaust system 抽出式系统gas up 瓦斯积聚methane buildup 甲烷积聚4.axial-flow fan 轴流式风机centrifugal fan 离心式风机variable-pitch 可变安装角characteristic curve 特性曲线blade 叶片power output 输出功率power input 输入功率5.downcast shaft 进风竖井drift 水平巷道slope 斜井adit 平硐intake airway 进风巷return airway 回风巷upcast shaft 回风竖井"blow-out" panel 冲击板（防爆门）stopping 风墙Seal 密闭Stratum 【地质学】地层：组成成份大致相同的沉积岩的岩床或岩层spontaneous combustion 自燃door 风门airlock 风闸6.ventilation network 通风网络dead-end 独头巷道junction (node) 节点mass flow 质量流量volume flow 体积流量mesh 网孔datum 数据（data)【测】基点线, 基准面specific volume 比容barometric[,b?r?u'metrik] 大气压力的loop 回路Kinetic [ki'netik] energy 动能NVE=natural ventilation energy 自然通风能量NVP=natural ventilation pressure 自然风压7.propane 丙烷carbon dioxide 二氧化碳stratification 分层buoyancy 浮力turbulence 湍流hydrocarbon 碳氢化合物（烃类）8.rank 品级bituminous 烟煤anthracite 无烟煤igneous 【地】火成的natural fracture 原生裂隙cleat 【地质】割理porosity [p?:'r?siti] 多孔性9.conflagration [k?nfl?'ɡrei??n] 大火, 大火灾, 突发compressor [k?m'pres?] 压缩机Thrower ['θr?u?] 【军】投掷器, 喷射器, 发射器combustible [k?m'b?st?bl] 易燃物；可燃物earth [?:θ] [电] 接地, n.地线; 泥土；尘世；陆地smouldering ['sm?uld?ri?] 闷烧, 低温炼焦, 低温干馏propagation [,pr?p?'ɡei??n] 蔓延proliferate [pr?u'lif?reit] 增生蔓延distilled 由蒸馏得来的conveyor 运输机gearhead ['ɡi?hed] 机头sprinkler system ['spri?kl?] 自动喷水消防系统high expansion foam [f?um] 高倍膨胀泡沫10.sulphide ['s?lfaid] 硫化物inhibit [in'hibit] 阻止反应，减慢（反应的）速度oxidation [,?ksi'dei??n] 氧化作用SHT-self-heating temperature 自然温度Exothermic [,eks?u'θ?:mik] [化]发热的, 放出热量的chemisorption [kemi'z?:p??n] 化学吸附作用peroxy-complexe [p?'r?ksi] [k?p l?ks] 过化合物oxalic acid [?k's?lik] ['?sid] 草酸aromatic acid [,?r?u'm?tik] 芳香酸gobstink [sti?k] 采空区臭味Incineration [in,sin?'rei??n] 烧成灰susceptibility to spontaneous combustion 自然倾向性petrology [pi:'tr?l?d?i] 岩石学adiabatic [,?di?'b?tik] [物]绝热的, 隔热的goaf (gob) [ɡ?uf] 采空区friability [frai?'biliti] 脆性winning ['wini?] 【矿】开采; 备采煤区pillar 支柱per centage extraction 开采百分率multi-lift 多分层caving mining 崩落开采法gradient ['ɡreidi?nt] 倾斜度;梯度11.aerosol ['ε?r?s?l] 浮质(气体中的悬浮微粒,如烟,雾等) Microflora [,maikr?u'fl?:r?] 微植物群respiratory ['resp?r?t?ri] 呼吸的abrasion [?'brei??n] 磨损boring 打眼；钻进；钻探extraction 开采longwall 长壁开采法shearer （滚筒式）采煤机。

内燃机专业英语自编讲义部分：1. Engine Classification and Overall MechanicsThe automobile engines can be classified according to: 1. number of cylinders; 2. arrangement of cylinders; 3. arrangement of valves; 4. type of cooling; 5. number of cycles (two or four); 6. type of fuel burned; 7. type of ignition.The engine is the source of power that makes the wheels go around and the car move. The automobile engine is an internal-combustion engine because the fuel (gasoline) is burned inside it. The burning of gasoline inside the engine produces high pressure in the engine combustion chamber. This high pressure forces piston to move, the movement is carried by connecting rods to the engine crankshaft. The crankshaft is thus made to rotate; the rotary motion is carried through the power train to the car wheels so that they rotate and the moves.The engine requires a fuel system to supply it with a mixture of air and fuel. The fuel system does this by pumping liquid gasoline from a tank into the carburetor, a mixing device that mixes the gasoline with air. The mixture is delivered to the engine where it is burned.The engine also needs a cooling system, the combustion of the air-fuel mixture in the engine creates a very high temperature (as high as 2000 to 2700 ℃). The cooling system takes heat away from the engine by circulating a liquid coolant (water mixed with antifreeze) between the engine and a radiator. The coolant gets hot as it goes through the engine. It cools off as it goes through the radiator. Thus, the coolant continually takes heat away from the engine, where it could do damage, and delivers it to the radiator. Air passing through the radiator takes heat away from the radiator.The engine also includes a lubricating system. The purpose of the lubricating system is to supply all moving parts inside the engine with lubricating oil; the oil keeps moving parts from wearing excessively.The engine requires a fourth system, the ignition system. The ignition system provides high-voltage electric sparks that ignite, or set fire to, the charges of air-fuel mixture in the engine combustion chambers.The fifth is starting system and its purpose is to change the electrical current into the mechanical energy to push the crank-shaft around. By means of this, the engine can be started.These five systems are discussed briefly in following sections.Words and Expressionscombustion chamber 燃烧室；ignition. 点燃；power train 动力传动系统；carburetor 化油器；antifreeze 防冻的；coolant 冷却剂（液态）；crankshaft 曲轴2. Four-stage-engine OperationThe action taking place in the engine cylinder can be divided into four stages, or strokes. “Stroke” refers to piston movement; as stroke occurs when the piston moves from one limiting position to the other. The upper limit of piston movement is called TDC （top dead center）. The lower limit of piston movement is called BDC (bottom dead center). A stroke is piston movement from TDC to BDC or from BDC to TDC. In other words, the piston completes a stroke each time it change its direction of motion.Where the entire cycle of events in the cylinder requires four strokes (or two crankshaft revolutions), the engine is called a four-stroke-cycle engine, or a four-cycle engine. The four piston strokes are intake, compression, power, and exhaust.Intake stroke. On the intake stroke, the intake valve has opened, the piston is moving downward, and a mixture of air and vaporized gasoline is entering the cylinder through the valve port. The mixture of air and vaporized gasoline is delivered to the cylinder by the fuel system and carburetor.Compression stroke. After the piston reaches BDC, or the lower limit of its travel, it begins to move upward. As this happens, the intake valve closes. The exhaust valve is also closed, so that the cylinder is sealed. As the piston moves upward (pushed now by the revolving crankshaft and connecting rod), the air-fuel mixture is compressed. By the time the piston reaches TDC, the mixture has been compressed to as little as one-tenth of its original volume, or even less. This compression of the air-fuel mixture increases the pressure in the cylinder. When the air-fuel mixture is compressed, not only does the pressure in the cylinder go up, but the temperature of the mixture also increases.Power stroke. As the piston reaches TDC on the compression stroke, an electric spark is produced at the spark plug. The ignition system delivers a high-voltage surge of electricity to the spark plug to produce the spark. The spark ignites, or sets fire to, the air-fuel mixture. It now begins to burn very rapidly, and the cylinder pressure increases to as much as 3-5 MPa or even more. This terrific push against the piston forces it downward, and a power impulse is transmitted through the connecting rod to the crankpin on the crankshaft. The crankshaft is rotated as the piston is pushed down by the pressure above it.Exhaust stroke. As the piston reaches BDC again, the exhaust valve opens. Now, as the piston moves up on the exhaust stroke, it forces the burned gases out of thecylinder through the exhaust-valve port. Then, when the piston reaches TDC, the exhaust valve closes and the intake valve opens. Now, a fresh charge of air-fuel mixture will be drawn into the cylinder as the piston moves down again toward BDC. The above four strokes are continuously repeated.Words and Expressionsstroke 行程，冲程；BDC 上止点；TDC 下止点；surge 冲击，脉动；terrific 了不起的，绝妙的；crankpin 曲柄销，连杆轴颈；intake stroke 吸气冲程；compression stroke 压缩冲程；power stroke 做功冲程；exhaust stroke 排气冲程；fresh charge （发动机）吸入的新鲜混合油气3. Two-stage-engine OperationIn the four-stroke-cycle engine, already discussed in lesson 1、2, the complete cycle of events requires four piston strokes (intake, compression, power, and exhaust). In the two-stroke-cycle, or two-cycle, engine, the intake and compression strokes and power and exhaust strokes are in a sense combined. This permits the engine to produce a power stroke every two piston strokes, or every crankshaft rotation.In the two-cycle engine, the piston acts as a valve, clearing valve ports in the cylinder wall as it nears BDC.A fresh air-fuel charge enters through the intake port, and the burned gases exit through the exhaust port. The complete cycle of operation is as follows: As the piston nears TDC, ignition takes place. The high combustion pressures drive the piston down, and the thrust through the connecting rod turns the crankshaft. As the piston nears BDC，it passes the intake and exhaust ports in the cylinder wall. Burned gases, still under some pressure, begin to stream out through the exhaust port. At the same time, the intake port, now cleared by the piston, begins to deliver air-fuel mixture, under pressure, to the cylinder. The top of the piston is shaped to give the incoming mixture an upward movement. This helps to sweep the burned gases ahead and out through the exhaust port.After the piston has passed through BDC and stars up again, it passes both ports, thus sealing them off. Now the fresh air-fuel charge above the piston is compressed and ignited. The same series of events takes place again and continue as long as the engine runs.We mentioned that the air-fuel mixture is delivered to the cylinder under pressure. In most engines, this pressure is put on the mixture in the crankcase. The crankcase is sealed except for a leaf, or reed, valve at the bottom. The reed valve is a flexible, flat metal plate that rests snugly against the floor of the crankcase. There are holes under the reed valve that connect to the engine carburetor. When the piston is moving up, a partial vacuum is produced in the sealed crankcase. Atmospheric pressure lifts the reed valve off the holes, and air-fuel mixture enters the crankcase. After the piston passes TDC and starts down again, pressure begins to build up in the crankcase. This pressure closes the reed valve so that further downward movement of the piston compresses the tapped air-fuel mixture in the crankcase. The pressure which is built up on the air-fuel mixture then causes it to flow up through the intake port into the engine cylinder when the piston moves down far enough to clear the intake port.The two-stroke engine is not only very simple but gives nearly twice the powerof a four stroke engine from a cylinder of given size, but it is wasteful of gasoline, as some mixture inevitably finds its way into the exhaust system on the combines intake/exhaust stroke, and there are always some combustion products left in the cylinder which reduce the rapid burning of the fuel. This kind of engine is always used in motorcycles.Words and Expressionssweep 扫气；connecting rod 连杆；crankcase 曲轴箱；seal off 密封；leaf （reed）valve 片簧阀；air-fuel charge 可燃混合油气4. Diesel Engine Operating FeaturesWe all know that diesel engines, in principle, work in the same way as gasoline engines do. Both kinds of engines are internal-combustion engines, but each of them has its characteristic features. As their names suggest this type of engines burn their fuel inside the working parts of the engines. “Internal” means “inside”, “combustion”means “catching fire or burning”. In any internal combustion engine, burning fuel heats air which consequently expands, and in expanding exists a push to a piston which, in turn, rotates the engine crankshaft through a connecting rod.Now let us compare the diesel engine with the gasoline engine. Firstly, the explosive mixture of the gasoline engine is provided by a carburetor, but in the case of the diesel engine the supply is a ffected by an injection or “jerk” pump which forces a “short” of fuel into each cylinder in turn according to the correct firing sequence. Secondly, the fundamental difference between gasoline and diesel engines is that in the gasoline engine the source of the heat for igniting the charge, namely, an electric spark, is generated outside the engine, and is taken, as it were, into the waiting charge at the required instant. In the diesel engine the source of heat for igniting the charge is created within the engine by compressing pure air to a degree that will initiate combustion and then injecting the fuel at the right time in relation to the movement of the crankshaft. Both classes of engines are of very similar construction. But as the diesel engine is called upon to withstand very much greater stresses due to higher pressures in cylinders, it has to be of more substantial construction, and is thus heavier. In general, the diesel engine may weigh about 9.25 kilograms per kilowatt. The most important advantage of the gasoline engine is its lower weight per kilowatt. The gasoline engine for automobiles weighs about 6.17 kilograms per kilowatt, and gasoline engines for airplanes may weigh as little as 0.77 kilograms per kilowatt. This advantage prevents the diesel engine from replacing the gasoline engine in some automobiles and airplanes.However, the diesel engine is more efficient, because it has higher compression ration. Its ratio may be as high as 16 to 1. Up to 40 percent of the chemical energy of the burning fuel may be changed into mechanical energy. In addition, the diesel engine runs cooler than the gasoline engine. This advantage is especially obvious at lower speeds. Diesel oil is not only cheaper than gasoline, but also safer to store. Words and Expressions：diesel：柴油机；internal-combustion engines：内燃机；jerk pump：脉动史喷油泵；compression ration：压缩比5. Engine Cylinder Block CrankcaseWe have seen how the mixture of air and fuel is delivered by the fuel system to the engine cylinder, where it is compressed, ignited, and burned. We have noted that this combustion produces a high pressure that pushes the piston down so that the crankshaft is rotated. Now let us examine the various parts of the engine in detail.Engine cylinder blockThe cylinder block of liquid-cooled engines forms the basic framework of the engine. Other parts are attached to the cylinder block or are assembled in it. The block is cast in one piece from gray iron or iron alloyed with other metals, such as nickel or chromium. Some blocks are cast from aluminum. The block contains not only the cylinders but also the water jackets that surround them. In aluminum blocks, cast-iron or steel cylinder sleeves (also called bore lines) are used. These metals have better wearing qualities than aluminum and can better withstand the wearing effect of the pistons and ring moving up and down in the cylinders. For most engines, cast iron has been found to be a satisfactory cylinder-wall material. However, in some small engines, the cylinder walls are plated with chromium, a very hard metal, to reduce wall wear and lengthen their life.Cylinder HeadThe cylinder head is usually cast in one piece from iron, from iron alloyed with other metals, or from aluminum alloy. Aluminum has the advantage of combining lightness with high heat conductivity. That is, an aluminum head tends to turn cooler, other factors being equal. There are two types of head, L head and I head. Cylinder head contains water jackets for cooling; in the assembled engine, these water jackets are connected through openings to the cylinder-block water jackets. Spark-plug holes are provided, along with pockets into which the valves can move as they open.GasketsThe joint between the cylinder block and the head must be tight and able to withstand the pressure and heat developed in the combustion chambers. The block and head cannot be machined flat and smooth enough to provide an adequate seal. Thus, gaskets are used. Head gaskets are made of thin sheets of soft metal or asbestos and metal. All cylinder, water, valve, and head-bolt openings are cut out. When the gasket is placed on the block and the head installed, tightening of the head bolts (or nuts) squeezes the soft metal so that the joint is effectively sealed. Gaskets are also used to seal joints between other parts, such as between the oil pan, manifolds, orwater pump and the block.Oil PanThe oil pan is usually formed of pressed steel. It usually holds 5 to 10 litres of oil, depending on the engine design. The oil pan and the lower part of the cylinder block together are called the crankcase; they enclose, or encase, the crankshaft. The oil pump in the lubricating system draws oil from the oil pan and sends it to all working parts in the engine. The oil drains off and runs down into the pan. Thus, there is constant circulation of oil between the pan and the working parts of the engine.Words and Expressionscylinder block 气缸体；block crankcase 曲轴箱；framework 结构，车架；gray iron 灰铸铁；water jacket 水套；plate……with 镀金属；cylinder head 气缸盖；gaskets 密封垫；asbestos 石棉；manifold 岐管；oil pan 油盘；pocket 凹槽；bore liner 气缸衬套6. Piston Connecting RodPistonThe piston is essentially a cylindrical plug that moves up and down in the engine cylinder. It is equipped with piston rings to provide a good seal between the cylinder wall and piston. The piston absorbs heat from the gas, and this heat must be carried away if the metal temperature is to be carried away if the metal temperature is to be held within safe limits. The constant reversal of the piston travel sets up inertial forces, which increase both with the weight of the piston and with its speed. For this reason, designers try to keep piston weight low, particularly in high-speed engines. As lower hood lines and over-square engines became popular, the semi-slipper and full-slipper pistons came into use. On these pistons the number piston rings was reduced to three, two compression and one oil-control. One reason for the slipper piston is that, on the short stroke, over-square engine, the piston skirt had to be cut away to make room for the counterweights on the crankshaft. Also, the slipper piston, being shorter and having part of its skirt cut away, is lighter. This reduces the inertial load on the engine bearings and, in addition, makes for a more responsive engine. The lighter the piston, the less the bearing load and the longer the bearings will last. Another way to lighten the piston is to make it of light metal. The idea piston material would be light and strong, conduct heat will, expand only slight when heated, resist wear, and be low in cost. Thus, most automotive-engine pistons today are made of aluminum, which is less than half as heavy as iron. Iron pistons were common in the earlier engines. Aluminum expands more rapidly than iron with increasing temperature, however, and since the cylinder block is of iron, special provisions must be made to maintain proper piston clearance at operating temperatures. To take care of it, the crown is machined on slight taper, the diameter being greatest where the crown meets the skirt and becoming less toward the top.Piston RingsA good seal must be maintained between the piston and cylinder wall to prevent blow-by. “Blow-by” is the name that describes the escape of burned gases from the combustion chamber, past the piston, and into the crankcase. In other words, these gases “blow by” the piston. It is not practical to fit the piston to the cylinder closely enough to prevent blow-by. Thus, piston rings must be used to provide the necessary seal. The rings are installed in grooves in the piston. Actually, there are two types of rings, compression rings and oil-control rings. The compression rings seal in theair-fuel mixture as it is compressed and also the combustion pressures as the mixture burns. The oil-control rings scrape off excessive oil from the cylinder wall and return it to the oil pan.The rings have joints (they are split) so that they can be expanded and slipped over the piston head and into the recessed grooves cut in the piston. Rings for automotive engines usually have butt joints, but in some heavy-duty engines, the joints may be angles, lapped, or of the sealed type.The rings are somewhat larger in diameter than they will be when in the cylinder. Then, when they are installed, they are compresses so that the joints are nearly closed. Compressing the rings gives them an initial tension; they press tightly against the cylinder wall.Connecting RodThe connecting rod is attached at one end to a crankpin on the crankshaft and at the other to a piston, through a piston pin or wrist pin. The connecting rod must be very strong and rigid and also as light as possible. The connecting rod carries the power thrusts from the piston to the crankpin. At the same time, the rod is in eccentric motion. To minimize vibration and bearing loads, the rod must be light in weight. To maintain good engine balance, connecting rods and caps are carefully matched in sets for engines. All rods in an engine must be of equal weight; if they are not, noticeable vibration may result. In original assembly, rods and caps are individually matched to each other and usually carry identifying numbers so they will not be mixed if the engine is disassembled for service. They must not be mixed during any service job, since this could result in poor bearing fit and bearing failure.Words and Expressionscounterweight 平衡重；groove 凹槽；recess 凹口；lap 搭接；eccentric 偏心的；lower hood lines 低发动机罩；over-square engine 短行程发动机；semi-slipper piston 半裙式活塞；full-slipper piston 全裙式活塞；match in set 配套；blow-by 漏气；initial tension 初张力；poor bearing fit 轴承不配套；bearing failing 轴承故障。