Unit汽车专业英语(车辆的种类汽车基本结构)课件.ppt

Unit oneAutomobile Basics Contents Pre-questions II. Text Explanation III. Exercises Types of Modern Automobiles 1）cars 2）passenger cars 3）trucks 4）tractors and vehicle combination 5）special type vehicle 6）Self-dumping car 7）farm vehicle 8) off-road vehicle Pre-questions Special vehicle car Tractor Truck Passenger Cars 2、with respect to engine arrangement and driving type engine arrangement and driving type diagram front engine 、 front-wheel drive front engine 、 rear-wheel drive Rear engine、 rear-wheel drive Pre-questions Do you know who built the first car in the world and when? Karl Benz In 1886 Pre-questions How many main parts does the automobile consist of? 1-engine 2-chassis 3-body 4--electrical system Pre-questions New Words and New Words and Expressions component [k?mp?un?nt] n.成分，组成，部件，零件 chassis [∫?si] n.底盘 transmission [tr?nzmi∫?n] n.变速器，传动, 传动系统，传送，发射 ignite [ignait] v.点火, 点燃 suspension [s?spen∫?n]n.悬架，悬挂 New Words and New Words and Expressions spark-ignition engine 点燃式发动机 compression-ignition engine 压燃式发动机 storage battery 蓄电池 ignition coil 点火线圈 power train 传动系，动力装置 propeller shaft 传动轴 ( = drive shaft ) Section A The Basic Components of an Automobile Todays average car contains more than 15,000 separate, individual parts that must work together. These parts can be grouped into four major categories: engine, body, chassis and electrical equipments. Engine The engine acts as the power unit. The internal combustion engine is most common: this obtains its power by burning a liquid fuel inside the engine cylinder. There are two types of engine: gasoline (also called a spark-ignition engine) and diesel (also called a compression-ignition engine). Both engines are called heat engines; the burning fuel generates heat which causes the gas inside the cylinder to increase its pressure and supply power to rotate a shaft connected to the transmission . Chassis The chassis is an assembly of those systems that ar