摘要由于现代社会的不断发展，作为现代化基础建设主要工具和手段的工程机械扮演着重要的角色。
工程机械设备是集机、电、液一体化和信息、激光等高新技术以及审美艺术于一身的现代机电产品，并且正在向着自动化、远距离控制和智能化等方向发展。
铲土机械作为现代工程机械很重要的一种设备也是如此。
铲土机械主要用于铲装土壤、沙石、煤炭、石灰等散状物料，也可对矿石、硬土等作轻度铲挖作业，换装不同的辅助工作装置还可以进行推土、起重、破碎等作业。
由于铲土机械具有作业速度快、效率高、机动性好、操作轻便等优点，因此广泛用于公路、铁路、建筑、水电、港口、矿山等建筑工程。
在我国，铲土机械经历了50～60年的发展后，到20世纪90年代中末期国外铲土机械技术已达到相当高的水平。
基于液压技术、微电子技术和信息技术的各种智能系统已广泛应用于铲土机械的设计、计算操作控制、检测监控、生产经营和维修服务等各个方面，使铲土机械在原来的基础上更加“精致”，其自动化程度也得以提高，从而进一步提高了生产效率，改善了司机的作业环境，提高了作业舒适性，降低了噪声、振动和排污量，保护了自然环境，最大限度地简化维修、降低作业成本，使其性能、安全性、可靠性、使用寿命和操作性能都达到了很高的水平。
随着国家机械工业的不断发展,由于液力传动的一系列优点,液力传动在工程机械领域得到了广泛的应用。
液力传动设计中发动机与液力变矩器的匹配是设计的关键技术之一。
本文主要研究工作如下:（1）对于现今的铲土机械的发动机和液力变矩器进行简单的介绍和分析。
（2）对铲土机械的发动机和液力变矩器其的匹配计算进行分析计算。
关键字：发动机；液力变矩器；AbstractDue to the continuous development of modern society, modern infrastructure as main tool and means of mechanical engineering plays an important role. Engineering machinery and equipment is set machine, electricity, liquid and information integration, laser technology and aesthetic art in one of the modern mechanical and electrical products, and is more automatic, remote control and intelligent development. Earth-moving machinery as a modern engineering machinery is very important in a device is so. Shoveling machine mainly used for loading soil, sand, coal, limestone and other bulk materials, is also available on the ore, hard soil for mild shovel digging, dress up different auxiliary device can also carry out bulldozing, lifting, crushing and other operations. As a result of shoveling machine is operating speed, high efficiency, good mobility, convenient operation and other advantages, it is widely used in highway, railway, construction, utilities, ports, mines and other construction projects.In our country, earth-moving machinery after 50～60years of development, to the end of nineteen ninties of foreign Earth-moving machinery technology has reached a very high level. Based on the hydraulic technology, microelectronic technology and information technology has been widely used in all kinds of intelligent systems Earth-moving machinery design, calculation of operation control, monitoring, production and repair services of all aspects, so that the earth machinery in the original basis of more" refined", the automation degree is improved, thereby further improving production efficiency, thus improving the operating environment for drivers, improving operation comfort, reduced noise, vibration and pollution, protect the natural environment, maximally simplified repair, reduces the operation cost, make its performance, safety, reliability, service life and operation performance have reached a very high level.Along with the development of the machinery industry, because of the advantages of a series of hydraulic transmission, hydraulic transmission in the field of mechanical engineering has been widely applied. Hydraulic transmission design of engine and hydraulic torque converter is one of the key technologies of matching design. The main research works are as follows: (1) the earthmachinery of the engine and hydraulic torque converter are introduced and analyzed. (2) for earth-moving machinery of the engine and hydraulic torque converter and its matching calculation analysis.Keywords: engine; torque converter;第一章铲土机械的发动机1.1 铲土机械的分类铲土机械主要分为装载机，铲运机和推土机：1.1.1推土机推土机是土方工程机械的一种主要机械，按行走方式分为履带式和轮胎式两种.因为轮胎式推土机较少。
