奔驰722.9自动变速器新技术教材

第三章自动变速器控制系统第一节概述奔驰W211底盘配置有两种型号的变速器：一种是型电子控制5前速自动变速器。

另一种从2003年秋季开始配备的自动变速器（奔驰称为：7G-TRONIC）。

五前速电控变速器的控制原理及维修数据在之前的会员资料中已经有详细的介绍，因此本书不再重复，本书主要介绍自动变速器的控制原理。

变速器如下图所示：自动变速器自动变速器是一个全电子控制自动变速器，它具备七个前进档和2个倒档，在这个变速器中，所有的功能和元件都组合在一个总成中，整合的电子液压控制总成保证变速器中使用最少的线束。

电子液压控制总成安装在变速器壳体的下边，变速器油不断的通过其他部件流过控制总成整个表面，以保证控制总成不会过热。

与以前的变速器比较，变速器具有如下优点：1、减少燃料消耗；2、提高了换档质量；3、换档更便利。

每百公里平均能降低的油耗，0-100km/h加速时间缩短，而60-120km/h加速性能亦有提高，表现迅捷的同时换档却更加柔和。

所有这些都归功于型变速器带来的更密的速比和更宽的变速范围。

此外，在合适条件下，变速器的液力变矩器闭锁离合器能在任何一个档位下闭锁，从而避免了无谓的功率消耗，提高传动效率。

在强制降档（kick-down）的过程中，它能跳档减档，比如说从7档直接减到5档再到3档，从而简化操作，提升加速性能。

第二节机械结构及工作原理自动变速器由液力变矩器和锁止离合器，液压油泵，变速器壳体带变速器机械和电子液压控制总成。

变速器机械由一套拉威娜行星齿轮组，前单排行星齿轮系统，后单排行星齿轮系统和驻车棘爪组成。

执行元件由多片式离合器K1、K2、K3，多片式制动器B1、B2、B3和BR组成。

电子液压总成由电子控制总成VGS（Y3/8）、阀体和阀的壳体组成，如下图所示。

1、驻车锁定轮；2、涡轮；3、导轮；4、泵轮；5、变速器壳体透气孔；6、油泵；7、制动器B1；8、离合器K1；9、拉威娜行星齿轮组；10、制动器B3；11、离合器K2；12a、前单排行星齿轮系统；12b、后单排行星齿轮系统；13、制动器BR；14、离合器K3；15、制动器B2；16、锁止离合器；17、变矩器壳体；18、输出轴速度感应轮；19、转速信号感应圈；20、转速信号感应圈；21、电子液压控制装置；22、档位选择杆1．动力传输路线如下图所示：2．机械连接关系及部件名称识别2-涡轮；3-导轮；4-泵轮；5-拉威娜齿轮组小齿圈； 6-拉威娜齿轮组行星架；7-拉威娜齿轮组太阳轮；8-拉威娜齿轮组大齿圈；9-后单排齿轮组的齿圈；10-后单排齿轮组的行星架；11-后单排齿轮组的太阳轮；12-前单排行星齿轮组的齿圈；13-前单排行星齿轮组的行星架；14-前单排行星齿轮组太阳轮；16-锁止离合器；A-输入；B-输出；BR 、B1、B2、B3-多片式制动器；K1、K2、K3 多片式离合器；PL2k 拉威娜行星齿轮组的短行星轮；PL2l -拉威娜行星齿轮组的长行星轮；PL6-后单排行星齿轮组的行星齿轮；PL9 前单排行星齿轮组的行星齿轮注意：变速器中的拉威娜行星齿轮机构与传动的拉威娜行星齿轮机构在结构上有所区别，行星齿轮识别，如右图所示：各齿轮与执行元件的连接如上图所示。

Mercedes 722.9Presented by Dr William (Bill) Henney PhD F.I.M.IFeatures•Electronically Controlled Automatic Gearbox•7 Forward and 2 Reverse Gears•Transmission Control Module is :Integrated into the Valve Body and is “Flash”Capable•Torque Converter operates in Open and Slip Mode in all 7 Forward Gears•Gear Ratios achieved with 3 Clutches and 4 Brakes (No Free-Wheeling Units)•3 Planetary Gearsets2–Simple and 1-RavigneauxAdvantages•Shift comfort and driving pleasure enhanced through improved control of gear changes.1.Shorter computer reaction time by 0.1 second2.Downshifts shortened by up to 0.2 second3.Coast downshifts shortened by 0.4 -2.5 seconds •Fuel consumption improved by 4%•Noise level reduced due to lower engine speeds in higher gears.•Flexible adaptation to engine and vehicle.Transmission Applications •Currently only one size of 722.9 will be produced. Asmaller version W7A 700 has been postponed until further notice.•The transmission is also referred to as :NAG 2 (New Automatic Gearbox 2)7 G-Tronic•First installed in Non 4matic 2004 year -M113 engine vehicles. S430 –S500 –CL500 –E500 –SL500•722.6 Transmission (NAG 1 or NAG V) will continue to be built until 2012Variable Shift Programming •Just like the 722.6 it has two basic shift programs using the S/C button on the ESM Electronic Shifter Module.“S”(Sport) “C”(Comfort)1st Gear Starts 2nd Gear StartsNormal Shift Points Earlier Upshifts/Later Downshifts Reverse ratio -3.416:1 Reverse ratio -2.231:1•The Transmission will start in 1st gear if any of the following conditions apply:1st gear is manually selected75% of full throttle acceleration from start Cold Engine Temperature (Pre-Catalytic warm-up)Transmission FluidIt is suggested a new fluid should be used referred to as ATF3353. This has a higher thermal stability andfriction consistency.This fluid can be used on 722.3/4/5/6It requires no scheduled maintenance.Supplied by Shell & Fuchs Europein 1 Litre containers.Mercedes Part No. A001 989 45 03 10Transmission Fluid Level •No Dipstick or Dipstick tube.•Fluid level check using overflow method.•Oil pan has overflow pipe clipped onto the pan above drain plug.•Fluid level must be checked at specified temperature.NEWOLDPan depth +3mmOverflow pipe +13.5mm Transmission Fluid Level•A new oil pan is used and can be identified by its design and Part No. 220 270 09 12•The white overflow pipe has been increased in length and as a result will hold an extra 0.2 litres of fluid.Major ComponentsMajor Component Legend1.Park Pawl2.Turbine wheel3.Stator4.Impeller5.Transmission Breather6.Oil pump7.B1 Brake8.K1 Clutch9.Ravigneaux Gearset10.B3 Brake11.K2 Clutch12a. Front Simple Planetary12b. Rear Simple Planetary 13.BR Brake 14.K3 Clutch 15.B2 Brake 16.Torque Converter Clutch 17.Torque Converter housing 18.Output speed exciter ring 19.Internal speed ring magnet 20.Turbine speed ring magnet 21.Electro-hydraulic control unit 22.Range Selector LeverTorque Converter1.Lock-up with torsional damper springs 2.Turbine wheel 3.Stator 4.Impeller•Same as used in some 722.6 transmissions •Fluid capacity 4 Litres •Lock-up can be activated in all 7 gears •Incorporates damper springs to reduce vibrationTorque Converter•The Torque Converter is never fully locked•In 1st and 2nd gears if throttle and output speed are in zone A the Torque converter is openIf throttle and outputspeed are in zone B itoperates in slip-mode in all 7 forward gears•If temperature exceeds 140 Deg C the TCC is switched off and lower gear selected. (DTC 2226)BA N D A = OPEN N = OUTPUT SPEEDB = SLIP-MODE D = % THROTTLE•Torque converter housing is die-cast Aluminium •Transmission is die-cast magnesium (2Kg weight reduction)•New aluminium bolts must be used if removed and tightening torques should be adhered to•Thread repairs to magnesium case is permissibleTransmission HousingTransmission Housing •Housing gasket is made from aluminium sheet coated with elastomer and can be re-used•The gasket has a lipthat faces forwardto direct water awayfrom the casing•Salt water can damagemagnesium in as littleas 8 weeksOil Cooler Pipes•The transmission cooler pipes are sealed with an O’ring and retainedusing a boltOil Pump•This transmission as like the 722.6 uses a crescent style pump•The suction side has a recess to help reduce oil intake noise. This is also expected to be phased in on the 722.6•To improve performanceat high temperatures andalso reduce weight it isexpected that the pumpand gears will soon bemade from aluminiumRavigneaux Gear Set•The advantages of the Ravigneaux Gear set are that it combines two simple planetary sets into one simple unit•It increases available gear ratios compared to a simple planetary set. It has two ring gearsShort planetary gearLong planetary gearSun gearPlanetary gear carrierSmall ring gearLarge ring gearRavigneaux Gear Set•The input from the torque converter turbine arrives at the gear set via the small ring gear•The long planetary gear transfers drive via the the sun gear or short planetary gear depending upon the applied memberShort Planetary GearLong Planetary GearSun GearPlanetary Gear CarrierSmall Ring GearLarge Ring GearMulti -Disc Brakes•B1 & B3 Multi-disc brakes use single sided platesB1B3BRB2Outer teethInner teethMulti -Disc Clutches •All multi-disc clutches use single sided platesOuter teethInner teeth K1K2K3Shift Application ChartXXX-2.231R(2)X X X-3.416R(1)X X N(1)X XX 0.7287X X X0.8206X X X1.0005X X X 1.3684X X X 1.9213X X X2.8592X XX 4.3771K3K2K1BR B3B2B1RATIOGEAR (1) = S Mode (2) = C Mode•In neutral 2 elements are applied, so only 1 element needs to apply when selecting either D or R •A gear change is made by applying an element whilst disengaging anotherPower Flow 1st GearPower Flow 2nd GearPower Flow 3rd GearPower Flow 4th GearPower Flow 5th GearPower Flow 6th GearPower Flow 7th GearPower Flow Reverse (S mode)Power Flow Reverse (C mode)Shift Sequences•In addition to sequentially shifting the 722.9 can downshift skipping gears providing the one element applied, one element released principleXX X 1st X X X 2ndX X X 3rdX X X 4thX X X 5thX X X 6thX X X 7thK3K2K1B3B2B1Electro-hydraulic Module •Uses same principle as 722.6 of controlling hydraulics with electronics•The module will adapt for optimal shift quality •Mounted to the Valve body are components that control, monitor and enable the gear shiftsElectro-hydraulic ModuleElectro-hydraulic Module •Each Valve body is individually tested•Hydraulic pressures and currents are measured •Values are evaluated and corresponding algorithms are written to the modules permanent memory •This ensures that the module is calibrated to that valve body•Once this process is complete the valve body is installed in the transmissionElectric Control Module •The task of the Electric Control module is to -Evaluate various input signalsCalculate shift points according to programming Evaluate gear shifts and attempt to adaptActivate 8 control solenoid valvesTemperatureSensor“Flashable”capable software using SDS / DASElectric Control Module•As the control module is integrated into the valve body, wiring to the transmission has been greatly reduced•Electrical plug has only 5pins1.= CAN C High2.= CAN C Low3.= To diagnostic X11/44.= Circuit 87 (relay & fuse)5.= Circuit 31Electric Control Module •The plug connector is sealed by two O’rings and one square section sealPlug connectorO’RingsSquare section sealElectric Control ModuleY3/8n3 Output speed sensorY3/8n1 Input speed sensorY3/8n2 Internal speed sensorY3/8s1 Range selector sensor 11Electrical connector X11/4 Diagnostic socket Y3/8n4 Electric control module Y3/8y1 –Y3/8y8 SolenoidsInformation Received Over CAN C1.Engine RPM2.Engine coolant temperature3.Throttle pedal position4.Engine load5.ESP signals6.Cruise control signals7.ESM (Shifter position)Information Received Directly1.Speed sensors2.Range selector sensor3.Transmission fluid temperatureSpeed Sensors Y3/8n1 & n2•Front speed sensor (Y3/8n1) monitors turbine speed (input shaft/ small ring gear)•Centre speed sensor (Y3/8n2) monitors Ravigneaux planet carrier speed•These sensors are Active speed sensors•They permit a signal to be read through other Non-ferrous parts•The magnets are moulded in plastic rings and secured inside aluminium flangesRing magnet Parking gearExciter ringTurbine sensorInternalsensorOutput sensor Integrated ringmagnetSpeed Sensors Y3/8n1 & n2Y3/8n2Y3/8n1Speed Sensor Y3/8n3Ring magnet Parking gearExciter ringTurbine sensorInternalsensorOutput sensor Integrated ringmagnet•The Y3/8n3 sensor measures transmission output speed from a ring attached to the park gear •It is a Hall effect type sensor•Replaces wheel speed information previously used to calculate shift points and detects gear slip •Direct input to electric control module•Improves reaction time to changes in vehicle speedSolenoid Valves•The solenoids are actuated by the transmission control module using variable current•Each solenoid valve has a filter screen fitted•The 4 solenoids shown are normally closed. No current / no pressure. Pressure increases with currentB2 Brake TCC ValveB3 Brake K1 ClutchSolenoid Valves•The valves shown are normally open. They produce maximum pressure with no current applied and decrease pressure with current•These valves are responsible for limp-home mode when all valves are de-energisedK2 Clutch Pressure RegulatorK3 ClutchB1 BrakeHydraulic Diagram Shown in 2nd gearHydraulic Diagram LegendRange Selector Sensor (Y38s1)•The sensor is soldered onto the ribbon cable of the electric control module•This sensor cannot be replaced separately•It records the position of the range selection lever•It is a PLCD, Permanent magnetic Linear Contactless Displacement sensor•It is constructed of a soft magnetic core surrounded by a wire along it’s length with additional coil at each end•It has a permanent magnet on the range selector valve which changes it’s magnetic fieldand output voltageof the sensorWARNINGThis sensor must be“learned in”or Limp-homewill occurFluid Level Control•This feature reduces the possibility of gear sets running in fluid and causing ATF foaming •Two floats are used because the transmission is 41mm longer than the 722.6 and fluid has a tendency to run to the front of the case under sharp brakingFront level floatRear level floatCheck and Diagnosis•Oil Level Check•Limp-home Modes•DTC’s•EDAC•Replacement of Transmission or Control Module•SCN & CVN CodingFluid Level9.7 Litres 9.5 Litres Fluid fill total 40 –45 Deg C 30 –35 Deg C Level check40 Deg C 30 deg C Initial fill checkS127.00-P-0002B S127.00-P-0002A WIS document No.New pan Design Old Pan Design•The fluid level should be checked a specific fluid temperatures using SDS / DAS•There are two different oil pan designs with different fill specifications •Mercedes recommend using a special filling tool to add fluid via the drain bung。

本科生毕业论文（设计）题目奔驰722.9自动变速器的构造及检测维修学生姓名班级学院交通学院专业汽车检测与维修指导教师职称摘要随着自动变速器在现代轿车上使用的普及，自动变速器的维修也越来越成为汽修行业的重中之重。

本文以奔驰722.9自动变速器为例重点介绍了其结构、原理和维修方法。

论文介绍了奔驰722.9的结构、工作原理、常出故障及它所出故障的维修。

总结了奔驰722.9自动变速器在工作生活中所遇见的现实故障，对故障汽车不能升档、无前进档、无倒车档等常见故障进行了分析研究，提出了现实故障中的思路和排除的方法。

关键字：奔驰722.9自动变速器、结构、原理、检测、维修AbstractAlong with auto the gearbox is on the modern car usage of universality, auto the maintain of gearbox also more and more become a vapor to practice moral teachings an industry of heavy medium of heavy.This text with speed 722.9 auto gearbox for example point introduction it structure, principle with maintain a method.Thesis introduction speed 722.9 structures, work principle, often break down and it break down of maintain.Summary speed 722.9 auto the gearbox is in the work the life the reality meet break down, to break down the car can't rise file, have no go forward file, have no reverse's etc. familiar break down carried on analysis research, put forward reality break down medium of the method of way of thinking and expel.Key words: Speed 722.9 auto gearbox, structure, principle, examination, maintain目录第1章绪论 (1)第2章自动变速器的分类 (2)2.1 ECT电控液力自动变速器 (2)2.2自动变速器 (2)第3章电控液力自动变速器的构造 (3)3.1总体构造 (3)3.2 油泵 (3)3.3变矩器 (4)3.4拉维纳尔赫行星齿轮组： (5)3.5多片式离合器和制动器 (6)3.6 工作元件表： (7)3.7 各档位传动图及工作原理 (8)3.7.1 一档传动图及原理 (8)3.7.2 5档传动图及原理： (9)3.7.3 7档传动图及原理： (9)3.7.4 ‘S’模式的倒档传动图及原理： (10)3.7.5 驻车档锁止： (11)3.7.6 各油压说明 (12)3.7.7 换档功能和换档过程： (13)3.8 电子部件工作原理 (14)3.8.1 全集成式变速箱控制(VGS) (14)3.8.2 信号简图： (16)3.8.3 电磁阀： (16)第4章汽车自动变速器故障检修方法 (18)4.1自动变速器故障检测一般程序 (18)4.2自动变速器常见的故障及原因 (18)4.3轿车自动变速器出现故障，首先对其进行基础检验。

第四章 722.9自动变速器控制系统第一节技术数据一、722.9自动变速器油液项目Transmission 722.9除了722.960/961/962/963/964,除了722.901 with code A25Transmission 722.901with code A25Transmission722.960/961/962/963/964首次加注量(L)9L 6.7L 9.6LATF型号1、Fuchs Titan ATF 33532、MB 236.12 ATF 3353 A 001 989 45033、Mobil ATF 33534、Shell ATF3353二、722.9自动变速器传动比及元件工作表GearRatioW7A 700B1 B2 B3 BR K1 K2 K31 4.377 ●●●2 2.859 ●●●3 1.921 ●●●4 1.368 ●●●5 1.000 ●●●6 0.820 ●●●7 0.728 ●●●N ●●R（S）-3.416 ●●●R（C）-2.231 ●●●第二节 722.9自动变速器电子控制系统一、变速器控制系统元件图4-1 722.9自动变速器控制电磁阀（in models 211）Y3/8-变速器控制单元 Y3/8y1-压力控制电磁阀 Y3/8y2 –K1离合器控制电磁阀Y3/8y3- K2离合器控制电磁阀 Y3/8y4- K3离合器控制电磁阀 Y3/8y5 -B1制动器控制电磁阀Y3/8y6- B2制动器控制电磁阀 Y3/8y7-B3 制动器控制电磁阀 Y3/8y8- TCC锁止控制电磁阀涡轮转速传感器（Y3/8n1）、内部转速传感器（Y3/8n2 ）、输出转速传感器（Y3/8n3）与VGS完全集成式自动变速器电子控制单元牢固连接，不能单独更换。

图4-2 722.9自动变速器转速传感器功能图4-3 722.9自动变速器转速传感器Y3/8-变速器电子控制单元 Y3/8n1涡轮转速传感器 Y3/8n2-内部转速传感器 Y3/8n3-输出转速传感器 Y3/8n4 完全集成式自动变速器（VGS ）控制单元 Y3/8s1 换档杆行程传感器1314a3 Y3/8n3 Y3/8n1 Y3/8n22 Y3/8s1Y3/8y6 Y3/8y3 Y3/8y1 Y3/8y8Y3/8n3 Y3/8 32Y38y4 Y3/8n2 Y3/8y7 Y3/8y5 Y3/8n1 Y3/8y2 Y3/8n4 11二、阀体图图4-4 722.9自动变速器阀体分解图1-工作压力调节阀 2- K1调节阀 3- B1调节阀 4-换档阀B1/B3 5-调节阀B3 6-换档阀K3 7-换档阀B2-2 8-调节阀 B2/BR 9-换档阀 K2 10-回家模式换档阀 11-调节阀K2 12-润滑压力调节阀13-TCC锁止离合器调节阀 14-液力变扭器锁止离合器内部压力调节阀图4-5 722.9自动变速器阀体分解图15- K3压力调节阀 16-供油压力调节阀 17-供油压力2调节阀18-换档阀B2-1 19-换档杆阀（手控阀）三、换档操纵及锁止机构图4-6 722.9换档操纵装置（in models 211）N15/5 电子换档杆控制模块 S16/5-变速器模式开关图4-7 点火开关锁止功能（换档杆在P位置）N15/5-电子换档杆控制模块 N26/5电子转向锁止控制单元 N73 EIS [EZS]控制单元N15/589103102100 10169 80图4-8 R/P锁止结构第三节 722.9自动变速器动力传递一、变速器内部结构图4-9 722.9变速器内部结构（in models 211）二、各档位动力传递路线（一）、1档动力传递路线2 Turbine wheel 12 Intemal gear B2 Mutiple-disc branke B23 Stator 13 Ptanet carrier B3 Multiple-disk branke B34 Lmpeller 14 Sun gear K1 Multi-disk clutch K15 Small intemal-geared wheel 16 Torque conveter lock dutch K2 Multi-disk clutch K26 Dual planet carrier K3 Multi-disk clutch K37 Sun gear A Input PL2K Short planet gears8 Large internal-geared wheel B Output PL21 Long plantet gears9 Intemal gear BR Multi-disk brake BR PL6 Planet gears10 Planet carrier B1 Multip;e-disc brank B1 PL9 Planet gears11 Sun gear（二）、2档动力传递路线图4-11 722.9自动变速器2档动力传递路线（三）、3档动力传递路线图4-12 722.9自动变速器3档动力传递路线（四）、4档动力传递路线图4-13 722.9自动变速器4档动力传递路线（五）、5档动力传递路线图4-14 722.9自动变速器5档动力传递路线（六）、6档动力传递路线图4-15 722.9自动变速器6档动力传递路线（七）、7档动力传递路线图4-16 722.9自动变速器7档动力传递路线第四节自动变速器故障码表及数据流一、故障码表（722.6）P2000 Component N15/3 (ETC[EGS] control unit)is defective.P2001 Component N15/3 (ETC[EGS] control unit)is defective.P2002 Component N15/3 (ETC[EGS] control unit)is defective.P2003 Component N15/3 (ETC[EGS] control unit)is defective.P2004 Component N15/3 (ETC[EGS] control unit)is defective.P2005 Component N15/3 (ETC[EGS] control unit)is defective.P2006 Component N15/3 (ETC[EGS] control unit)is defective.P2007 Component N15/3 (ETC[EGS] control unit)is defective.P2008 Component N15/3 (ETC[EGS] control unit)is defective.P200A Component N15/3 (ETC[EGS] control unit)is defective.P200B Component N15/3 (ETC[EGS] control unit)is defective.P200C Component N15/3 (ETC[EGS] control unit)is defective.P2013 Component N15/3 (ETC[EGS] control unit)is defective.P2100 The internal electrical check of component Y3/6y3(1-2 and 4-5 shift solenoid valve) has failed. P2101 Component Y3/6Y3(1-2 and 4-5 shift solenoid valve) has a short circuit to ground.P2102 The internal electrical check of component Y3/6y5(2-3 shift solenoid valve)has failed.P2103 Component Y3/6y5(2-3 shift solenoid valve) has a short circuit to ground.P2104 The internal electrical check of component Y3/6y4(3-4 shift solenoid valve)has failed.P2105 Component Y3/6y4(3-4 shift solenoid valve)has a short circuit to ground.P2106 The internal electrical check of component Y3/6y6(Torque converter lockup PWM solenoid valve) has failed.P2107 The internal electrical check of component Y3/6y1(Modulating pressure control solenoid valve) Has failed.P2108 The internal electrical check of component Y3/6y2(Shift pressure control solenoid valve)has failed. P2200 Component Y3/6n2(speed sensor 2)is faulty or the sensor supply has Short circuit.P2203 The internal electrical check of component Y3/6n3(speed sensor3)has failed.P220A The speed comparison of Y3/6n2 to Y3/6n3 is implausible.P220B The speed of Y3/6n2 or Y3/6n3 is too high.P2220 Component Y3/6s1 (Starter lockout contact)or component Y3/6b1(Transmission oil temperature Sensor)is faulty or both.P2221 The signal of component Y3/6b1(Transmission oil temperature sensor)and(or) Y3/6s1(Starter lockout Contact)is implausible.P2222 The signal of component Y3/6b1(Transmission oil temperature sensor)and(or) Y3/6s1(Starter lockout Contact)is implausible.P2300 CAN communication with other control units installed in this vehicle is not possible.(Bus OFF Fault)P2301 CAN communication with other control units installed in this vehicle is not possible.(Bus OFF Fault)P2500 The transmission has an impermissible transmission ratio.P2502 The gear is implausible or the transmission is slipping.P2503 The gear comparison is negative or the target is not reached.P2507 Engine overspeed Y3/6n2(speed sensor2)P2508 Engine overspeed Y3/6n2(speed sensor3)P2510 The torque converter lock-up clutch causes impermissible closing.P2511 The torque converter lock-up clutch has excessive power consumption.P2512 Actuation of torque converter lockup clutch is not possible.P2560 The gear is implausible or the transmission is slipping.(1.gear)P2561 The gear is implausible or the transmission is slipping.(2.gear)P2562 The gear is implausible or the transmission is slipping.(3.gear)P2563 The gear is implausible or the transmission is slipping.(4.gear)P2564 The gear is implausible or the transmission is slipping.(5.gear)P2602 The voltage supply of the valves is faulty.P2603 The voltage supply of the speed sensors is faulty.P260E The supply voltage of the sensors is too low (undervoltage)P260F The supply voltage of the sensors is too high (overvoltage)二、722．9变速器故障代码0218 齿轮油的温度过高0604 部件Y3/8n4（完全集成式变速箱控制系统（VGS）控制单元）损坏。

第三章自动变速器控制系统第一节概述奔驰W211底盘配置有两种型号得变速器:一种就是722、6型电子控制5前速自动变速器。

另一种从2003年秋季开始配备得722、9自动变速器(奔驰称为:7GTRONIC)。

722、6五前速电控变速器得控制原理及维修数据在之前得会员资料中已经有详细得介绍,因此本书不再重复,本书主要介绍722、9自动变速器得控制原理。

722、9变速器如下图所示:722、9自动变速器就是一个全电子控制自动变速器,它具备七个前进档与2个倒档,在这个变速器中,所有得功能与元件都组合在一个总成中,整合得电子液压控制总成保证722、9变速器中使用最少得线束。

电子液压控制总成安装在变速器壳体得下边,变速器油不断得通过其她部件流过控制总成整个表面,以保证控制总成不会过热。

与以前得变速器比较,722、9变速器具有如下优点:1、减少燃料消耗;2、提高了换档质量;3、换档更便利。

每百公里平均能降低0、6L得油耗,0100km/h加速时间缩短0、3s,而60120km/h加速性能亦有提高,表现迅捷得同时换档却更加柔与。

所有这些都归功于722、9型变速器带来得更密得速比与更宽得变速范围。

此外,在合适条件下,变速器得液力变矩器闭锁离合器能在任何一个档位下闭锁,从而避免了无谓得功率消耗,提高传动效率。

在强制降档(kickdown)得过程中,它能跳档减档,比如说从7档直接减到5档再到3档,从而简化操作,提升加速性能。

第二节机械结构及工作原理722、9自动变速器由液力变矩器与锁止离合器,液压油泵,变速器壳体带变速器机械与电子液压控制总成。

变速器机械由一套拉威娜行星齿轮组,前单排行星齿轮系统,后单排行星齿轮系统与驻车棘爪组成。

执行元件由多片式离合器K1、K2、K3,多片式制动器B1、B2、B3与BR组成。

电子液压总成由电子控制总成VGS(Y3/8)、阀体与阀得壳体组成,如下图所示。

1、驻车锁定轮;2、涡轮;3、导轮;4、泵轮;5、变速器壳体透气孔;6、油泵;7、制动器B1;8、离合器K1;9、拉威娜行星齿轮组;10、制动器B3;11、离合器K2;12a、前单排行星齿轮系统;12b、后单排行星齿轮系统;13、制动器BR;14、离合器K3;15、制动器B2;16、锁止离合器;17、变矩器壳体;18、输出轴速度感应轮;19、转速信号感应圈;20、转速信号感应圈;21、电子液压控制装置;22、档位选择杆1.动力传输路线如下图所示:722、9自动变速1短行星轮 ;2长行星轮;3太阳轮;4行星架2.机械连接关系及部件名称识别2涡轮;3导轮 ;4泵轮;5拉威娜齿轮组小齿圈; 6拉威娜齿轮组行星架 ;7拉威娜齿轮组太阳轮;8拉威娜齿轮组大齿圈;9后单排齿轮组得齿圈;10后单排齿轮组得行星架 ;11后单排齿轮组得太阳轮 ;12前单排行星齿轮组得齿圈;13前单排行星齿轮组得行星架;14前单排行星齿轮组太阳轮 ;16锁止离合器;A 输入;B 输出;BR 、B1、B2、B3多片式制动器;K1、K2、K3 多片式离合器;PL2k 拉威娜行星齿轮组得短行星轮;PL2l 拉威娜行星齿轮组得长行星轮;PL6后单排行星齿轮组得行星齿轮;PL9 前单排行星齿轮组得行星齿轮注意:722、9变速器中得拉威娜行星齿轮机构与传动得拉威娜行星齿轮机构在结构上有所区别,行星齿轮识别,如右图所示:各齿轮与执行元件得连接如上图所示。

奔驰722.9自动变速器动力流矢量图分析法及其在教学中的应用作者：林夏武来源：《广东教育·职教版》2014年第01期摘要：矢量图分析是近年来逐步普及的用以分析自动变速器构造和动力传递的有效方法。

本文以奔驰722.9自动变速器教学为例，介绍教学过程中如何教会学生应用这项方法学习自动变速器。

关键词：矢量图；自动变速器动力流；奔驰722.9自动变速器中图分类号：G712 文献标识码：A 文章编号：1005-1422（2014）01-0132-03一、矢量图分析法的实用价值为了使维修人员对自动变速器结构、原理以及动力传递等关键内容透彻地理解，现代的企业中逐步推行一种能简单、明了地分析自动变速器结构和动力传递路线的方法——矢量法。

这种方法能够使维修人员快速地理解一款不熟悉的自动变速器的结构和动力传递路线，进而方便的对自动变速器动力流故障进行分析与判断。

对于职业学校的学生来说，自动变速器是汽车类专业学习中的一项难点，如果能教会他们利用这项方法，对攻克这项难点，提高学习兴趣有事半功倍的效果。

二、矢量图分析法对单排行星齿轮机构的分析单排行星齿轮运动性质如图1所示矢量分析图的基本框架，再根据不同齿轮的运行状态，可推导出整个行星轮系的传动情况。

图中S代表太阳轮转速，位于最左端；R代表内齿圈转速，位于最右端；C代表行星架；位于S和R之间某个位置，C点左右线段长度之比是α∶1。

α=齿圈齿数/太阳轮齿数，故α>1。

以齿圈固定为例，可以画出太阳轮与行星架转速比例及方向，行星齿轮机构的各种运动性质都可以用矢量图表示。

对于刚入门的学生，教学中可结合单排行星排教具演示行星齿轮机构各种工作状态，同时结合矢量图进行讲解，这样可将较难理解的周转轮系工作原理转变成较容易理解的图形。

三、奔驰722.9自动变速器动力流矢量图分析（1）奔驰722.9自动变速器于2003年9月上市，首先使用在奔驰W211（E500）、215（CL500）、220（S500）、230（SL500）等车型，目前已得到广泛应用。

自动变速器动力传递路线分析(十八)奔驰722.9(W7A 700 and W7A 400)自动变速器于2003年9月中旬上市，首先使用在211(E500)、215(CL500)、220(S430、S500)、230(SL500)等车型上。

722.9自动变速器是Mercedes―Benz第5代变速器，是在722.6自动变速器基础上发展而来，并逐步取代它。

该自动变速器有7个前进挡和2个倒挡，具有质量轻、燃油经济性好和增加驾驶乐趣的优点。

722.9动力传递路线，它由1个拉维那式复合行星齿轮机构和2个独立的简单行星齿轮机构来实现7前进挡、2倒挡共9速传动比变化。

在变速器内部有7组换挡执行元件，其中包括3组离合器和4组制动器。

各挡位传动比及不同挡位时各执行元件的状态。

一、1挡动力传递路线1挡动力传递路线，为能表达清楚，现将各行星齿轮机构的状态分别说明如下：1．前行星齿轮机构：前排行星齿轮机构是一个拉维那式复合行星齿轮机构，它由两个行星轮系组合而成，包括2个太阳轮、2套行星轮系和2个齿圈，其中前面是大齿圈，后面是小齿圈，行星架是动力输出端。

变速器的输入轴与前排拉维那式复合行星齿轮机构的后小齿圈相连。

是动力输入端。

1挡时。

制动器B3工作，固定前面的大齿圈，则行星架为同向减速输出。

2、行星齿轮机构：前行星齿轮机构的行星架是动力输出端，它与后行星齿轮机构的齿圈相连，则后行星齿轮机构的齿圈是动力输入端；制动器B2和离合器K3工作，固定后太阳轮，则后行星架同向减速旋转，将动力传递给中间齿圈。

3．中间行星齿轮机构：中间齿圈是动力输入端；制动器B2工作，固定中间太阳轮，则中间行星架同向减速旋转，是动力输出端。

由以上分析可知，1挡时，三个行星齿轮机构都在执行减速运动。

传动比最大。

前排拉维那式复合行星齿轮机构的实物。

在基础知识介绍中，没有对类似的拉维那式复合行星齿轮机构的传动比进行分析，这里作简单介绍，以利于读者区分1、2挡传动比的定量关系。