汽车专业英语课件.ppt

汽车专业英语课件
第一页，共17页。
Section 1 Automotive Basics第一篇 汽车基础
Chapter 1 General Information
Basic Parts Classific unit. There are two types of engine: gasoline engine (also called a spark-ignition engine) and diesel engine (also called a compression-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 the 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 running smoothly. Motor oil is the lubricant used in the system.
Basic Parts of Automobile
Engine
第七页，共17页。
An automobile body (-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 attractive, colorful, modem appearance for the vehicle. It is streamlined to lessen wind resistance and to keep the car from swaying at the driving speeds.
Body
Basic Parts of Automobile
第八页，共17页。
-2 An automobile body
第九页，共17页。
The chassis includes the power train, suspension, steering, and brake systems.
The 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 engine's power from and to the driving wheels of the vehicle. The main purpose of the transmission 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 b