




版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1、STRUCTURE of the Professional English,Automotive Maintenance and Repair,Section 1 Automotive Basics第一篇 汽车基础,Chapter 1 General Information Basic Parts Classification Chapter 2 Internal Combustion Engine Operation Classifications Block And Head Piston And Connecting Rod Crankshaft Valve System Fuel In
2、jection Direct Injection Common Rail Cooling Lubrication Chapter 3 Power Train Clutch M/T A/T CVT AMT DCT Chapter 4 Steering and Suspension Systems Chapter 5 Braking Systems Chapter 6 Electrical And Electronic Systems Power Sourse Startor Alternator Lights Signals Anti-theft Air-conditioning,本部分讲授内容
3、,New Words,1.1 Basic Parts of Automobile 1.1.1 Engine,New Words,1.1 Basic Parts of Automobile 1.1.1 Engine,New Words,1.1 Basic Parts of Automobile 1.1.1 Engine,Todays average car contains more than 15,000 separate, individual parts that must work together. These parts can be grouped into four major
4、categories: engine, body, chassis and electrical equipments,see Fig.1-1,Fig.1-1 basic parts of a car,1.1 Basic Parts of Automobile 1.1.1 Engine,The engine acts as the power unit. There are two types of engine: gasoline engine (also called a spark-ignition engine) and diesel engine (also called a com
5、pression-ignition engine). All engines have fuel, exhaust, cooling, and lubrication systems. Gasoline engines also have an ignition system. The ignition system supplies the electric spark needed to ignite the air-fuel mixture in the cylinders. The fuel system stores liquid fuel and delivers it to th
6、e engine. The fuel is mixed with air to form a combustible mixture in the carburetor, the manifold, or the cylinders themselves. The cooling system removes excessive heat from the engine. Air and a coolant are used to carry away the heat. The lubrication system is important in keeping the engine run
7、ning smoothly. Motor oil is the lubricant used in the system,1.1 Basic Parts of Automobile 1.1.1 Engine,An automobile body (Fig.1-2) provides a protective covering for the engine, passengers, and cargo. The body is designed to keep passengers safe and comfortable. The body styling provides an attrac
8、tive, colorful, modem appearance for the vehicle. It is streamlined to lessen wind resistance and to keep the car from swaying at the driving speeds,1.1.2 Body,1.1 Basic Parts of Automobile,Fig.1-2 An automobile body,The chassis includes the power train, suspension, steering, and brake systems. The
9、power train system comprises clutch, transmission, propeller shaft, rear axle and differential and the driving road wheels. The clutch or torque converter has the task of disconnecting and connecting the engines power from and to the driving wheels of the vehicle. The main purpose of the transmissio
10、n or gearbox is to provide a selection of gear ratios between the engine and driving wheels, so that the vehicle can operate satisfactorily under all driving conditions. Gear selection may be done manually by the driver or automatically by a hydraulic control system. The function of the propeller (d
11、rive) shaft is to transmit the drive from the gearbox to the input shaft of the rear axle and differential assembly. Flexible joints allow the rear axle and wheels to move up and down without affecting operation. The rear axle and differential unit transmits the engines rotational power through 90 f
12、rom propeller shaft to axle shaft to road wheels. A further function is to allow each driving wheel to turn at a different speed when cornering. A third function is to introduce another gear ratio for torque multiplication,1.1 Basic Parts of Automobile 1.1.3 Chassis,The basic job of the suspension s
13、ystem is to absorb the shocks caused by irregular road surfaces that would otherwise be transmitted to the vehicle and its occupants, thus helping to keep the vehicle on a controlled and level course, regardless of road conditions. The steering system provides the means by which the front wheels are
14、 directionally turned. The steering system may be power assisted to reduce the effort required to turn the steering wheel and make the vehicle easier to manoeuvre. The braking system on a vehicle has three main functions. It must be able to reduce the speed of the vehicle, when necessary; it must be
15、 able to stop the car in as short a distance as possible; it must be able to hold the vehicle stationary. Each wheel has a brake assembly, of either the drum type or the disc type, hydraulically operated when the driver applies the foot brake pedal,1.1 Basic Parts of Automobile 1.1.3 Chassis,The ele
16、ctrical system supplies electricity for the ignition, horn, lights, heater, and starter. The electricity level is maintained by a charging circuit. This circuit consists of a battery, and an alternator (or generator). The battery stores electricity. The alternator changes the engines mechanical ener
17、gy into electrical energy and recharges the battery,1.1 Basic Parts of Automobile 1.1.4 Electrical Equipment,Chapter 1 General Information1.2 Classification of Automobile,New Words,New Words,Chapter 1 General Information1.2 Classification of Automobile,Chapter 1 General Information1.2 Classification
18、 of Automobile,Motor vehicles can be classified depending on the following features: Uses of vehicle. Motor vehicles can be divided into passenger cars and commercial vehicles. Passenger cars are primarily intended for use in transporting people, as well as their luggage and other small cargo. The n
19、umber of seats, including that of the driver, is restricted to nine. Commercial vehicles are designed to transport people and cargo and for pulling trailers, see Fig.1-3. Body shapes. A sedan has an enclosed body with a maximum of 4 doors to allow access to the passenger compartment. The design also
20、 allows for storage of luggage or other goods. A sedan can also be referred to as a saloon and traditionally has a fixed roof. There are soft-top versions of the same body design except for having 2 doors, and these are commonly referred to as convertibles (Fig. 1-4,Chapter 1 General Information1.2 Classification of Automobile,Chapter 1 General Information1.2 Classification of Automobile,Fig.1-4 Body shapes,Multi
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 2025年企业员工专项技能培训合同范文
- 2025年新版建筑项目分包合作框架合同
- 公寓出租商用合同范例
- 2025年度门卫消防安保聘用合同
- 自建房施工安全管理承包合同(2025年度)
- 二零二五年度智慧城市建设技术保密合同
- Unit 3 What would you like Part A Lets learn(教学设计)-2023-2024学年人教PEP版英语五年级上册
- 小学信息技术一年级上册第第7课 《播放动画与幻灯片》教学设计
- 《百变飞机 》(教学设计)浙教版二年级上册综合实践活动
- Unit2 An Accident(教学设计)-2024-2025学年北师大版(三起)英语六年级上册
- 移动公司2024招聘试题
- 电子装配操作安全课件
- 《义务教育道德与法治课程标准(2022年版)》
- 2024发电企业智慧电厂智慧安防技术方案
- 腾讯专有云产品介绍-售前篇
- 建筑施工安全生产责任制矩阵表(项目级)
- 甲状腺癌诊疗指南(2022年版)
- 外研版五年级英语下册M5u1-it's-big-and-light视导课件
- 火花机保养维护计划表
- 公司借款申请表
- 二年级口算天天练100题打印
评论
0/150
提交评论