汽车专业英语(英文）教学课件（完整版）.ppt

;汽车专业英语; Unit 1 Automotive Basics;Lesson 1; The modern automobile contains more than 15000 separate individual parts that must work together. These parts can be grouped into four major categories: engine、chassis、body and electrical equipment.; ; ; ; ; ; ; ; ;(1)Power train system—conveys the drive to the wheels. (2)Suspension system—absorbs the road shocks. (3)Steering system—controls the direction of the movement. (4)Brake system—slows down the vehicle.; Power train system conveys the drive to the wheels. The main components are clutch，gearbox，driveshaft，final drive，and differential.; The purpose of the complete suspension system is to isolate the vehicle body from road shocks and vibrations，which will otherwise be transferred to the passengers and load. It must also keep the tire in contact with the road regardless of road surface.; The steering system，under the control of the driver at the steering wheel，provides the means by which the front wheels are directionally turned. The steering system may be the power assisted to reduce the effort required to turn the steering wheel and make the vehicle easier to maneuver.;The braking system has three main functions， First，to reduce the speed of the vehicle，when Necessary Second，to stop the car in as short a distance as possible Third，to hold the vehicle stationary. ; An automobile body is a sheet metal shell with windows，doors，a hood，and a trunk deck built into it. It 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，modern appearance for the vehicle.; The electrical system supplies electricity for the ignition，horn，lights，heater，and starter. The electricity level is maintained by a charging circuit. This circuit consists of battery and alternator (or generator). The battery stores electricity. The alternator changes the engine‘s