专业英语-4汽车底盘(一)PPT优秀课件

1、汽车实用英语,Automobile English,Task Three Automobile Chassis,Objectives 1. To know about the importance of the automobile chassis; 2. To learn the main parts of the automobile chassis; 3. To learn the function of the braking system, power train, steering system, and suspension system.,1,Part Warm upKnow

2、about automobile chassis,Part Warm upKnow about automobile chassis,1,Part Warm upKnow about automobile chassis,1,Part Warm upKnow about automobile chassis,Grasp the useful words and phrases pull to one side 跑偏 tire inflation 胎压 tire wear 轮胎磨损,Part Listening and speaking,The four main systems of auto

3、mobile chassis are power train (or drive line)传动系, steering system转向系, braking system 制动系and suspension system悬挂.,Part ReadingPassage One Main structure of automobile chassis,Part ReadingPassage One Main structure of automobile chassisSteering system 转向系统,Part ReadingPassage One Main structure of au

4、tomobile chassisSteering system,The steering system is the means by which the driver of a vehicle is able to control the position of the front wheels. The system must provide ease of handling, good directional control, and stability.,Part ReadingPassage One Main structure of automobile chassisSteeri

5、ng system,There are two types of the steering system, manual steering system and power steering system. Power steering system includes hydraulic（液压） power steering system, electric power steering (EPS) and electric hydraulic power steering system (EHPS).,Part ReadingPassage One Main structure of aut

6、omobile chassisSteering system,Type: Mechanical steering system 机械转向系统 Power steering system 助力转向系统 Hydraulic power steering system 液压助力转向系统 Electronic control power steering (EPS) Electro-hydraulic power steering system (EHPS),Part ReadingPassage One Main structure of automobile chassisSteering sys

7、tem,The key components that make up the steering system are the steering wheel, steering column, steering shaft, steering gear, pitman arm（垂臂）, drag link（直拉杆）, steering arm（转向节）, ball joints, and tie-rod assembly（横拉杆）. Hydraulic power steering systems add a hydraulic pump, fluid reservoir, hoses, an

8、d either a power assist unit mounted on, or integral with a steering gear assembly.,Part ReadingPassage One Main structure of automobile chassisSteering system,Part ReadingPassage One Main structure of automobile chassisSuspension system悬挂系统,Part ReadingPassage One Main structure of automobile chass

9、isSuspension system,Suspension system has the following functions: To keep cars wheels in firm contact with the road. To provide a comfortable ride for the passengers. To provide steering stability with good handling.,Part ReadingPassage One Main structure of automobile chassisSuspension system,Ther

10、e are three fundamental components of any suspension: the springs（弹簧）, shock absorbers（减震器） and anti-sway bar (connecting linkages)（横向稳定杆）. Without these parts, the comfort and ease of driving would be reduced.,Additional words: Independent suspension Dependent suspension Non-independent suspension,

11、Part ReadingPassage One Main structure of automobile chassisSuspension system,Coil spring（螺旋弹簧） Leaf spring（钢板弹簧） Torsion bar （扭力杆） Air spring（空气弹簧）,Part ReadingPassage One Main structure of automobile chassisSuspension system,Electronic control suspension system Active suspension system Semi-active

12、 suspension system Spring stiffness弹簧刚度,Part ReadingPassage One Main structure of automobile chassisSuspension system,Wheel alignment 四轮定位 Wheel camber （前轮外倾角） Kingpin Caster （主销后倾角） Kingpin Inclination（主销内倾角） Toe-in （前束）,Part ReadingPassage One Main structure of automobile chassisSuspension system,

13、Part ReadingPassage One Main structure of automobile chassisBraking system（制动系统）,Automobile brakes must be able to stop the car, prevent excess speed when coasting, and hold the vehicle in position when stopped on grades. Each vehicle must have two independent brake systems for safety. The main brak

14、e system is service brake system（主制动系统）. The secondary is parking brake system（驻车制动）.,Part ReadingPassage One Main structure of automobile chassisBraking system, brake pedal 制动踏板 master cylinder 制动总泵 brake line 制动油管 wheel cylinder 制动分泵 brake drum 制动鼓 brake lining 制动蹄片, brake shoe 制动蹄 brake shoe retu

15、rn spring 回位弹簧 wheel cylinder piston 车轮油缸活塞 master cylinder piston 主缸活塞 pushrod 推杆,Part ReadingPassage One Main structure of automobile chassisBraking system,Anti-lock Braking System,Part ReadingPassage One Main structure of automobile chassisBraking system,Part ReadingPassage One Main structure of

16、automobile chassisBraking system,The power train（传动系） carries power from the engine crankshaft to the car wheels, so the wheels rotate and the car moves.,Part ReadingPassage Two Power train,Part ReadingPassage Two Power train,rear-wheel drive lines system,Part ReadingPassage Two Power train,Part Rea

17、dingPassage Two Power train,Angle drive,Universal drive,Drive axle,Go forward,transmission,clutch,engine,Engine RR drive bus sketch map,The clutch in an automotive vehicle provides a means of connecting and disconnecting the engine from the transmission, both starting up and during shifts.,Part Read

18、ingPassage Two Power trainClutch,The transmission provides a means of varying the relationship between the speed of the engine and the speed of the wheels. Manual transmission requires use of a clutch to remove the engine torque to the transmission input shaft.,Part ReadingPassage Two Power trainTra

19、nsmission,Additional words 可变速比 variable ratios有级变速 definite ratios无级变速 indefinite ratios分动器 transfer case, transfer box 无级变速器(CVT) Continuously Variable Transmission,Part ReadingPassage Two Power trainTransmission,膜片弹簧离合器 diaphragm spring clutch 四挡变速器 four-speed transmission 输入轴（第一轴）input shaft 输出轴

20、（第二轴）output shaft 中间轴 counter shaft倒挡轴 reverse gear shaft,Part ReadingPassage Two Power trainTransmission,常啮合 constant mesh低速挡 low gear高速挡 high gear最高速挡 top gear 换挡 shift啮合套 sliding sleeve同步器 synchronizer变速杆 shifting lever,Part ReadingPassage Two Power trainTransmission,空挡 neutral gear一挡 the first g

21、ear二挡 the second gear三挡 the third gear倒挡 reverse gear直接挡 direct gear超速挡 overdrive,Part ReadingPassage Two Power trainTransmission,In an automatic transmission, gear ratios are changed automatically. This eliminates the need for the driver to operate the clutch and manually “shift gears”.,Part Readin

22、gPassage Two Power trainAutomatic transmission,The typical automatic transmission consists of a fluid torque converter（液力变矩器）, a planetary-gear system（行星齿轮机构）, and a hydraulic control system（液压控制系统）. In addition to the forward-gear ratios, neutral（空挡）, and reverse（倒档）, the automatic transmission has

23、 a “park” position.,Part ReadingPassage Two Power trainAutomatic transmission,Part ReadingPassage Two Power trainAutomatic transmission,The drive shaft (propeller shaft) connects the transmission output shaft to the differential pinion shaft. The universal joint is used to connect the drive shaft to

24、 the transmission output shaft. U-joints allow the drive shaft to flex when the drive angle changes.,Part ReadingPassage Two Power trainDrive shaft,When the car begins to round a curve, the differential pinion gears rotate on the pinion shaft. This permits the outer wheel to turn faster than the inn

25、er wheel.,Part ReadingPassage Two Power trainDifferential,Part ReadingPassage Two Power trainDifferential,Each vehicle must have two independent brake systems for safety. The main brake system is _, The secondary is _.,service brake system,parking brake system,Part ReadingPassage Two Power trainExer

26、cises,The brake system is one of the most important safety systems on the _.,vehicle,Part ReadingPassage Two Power trainExercises,The _ in an automobile provides a means of connecting and disconnecting the engine from the transmission.,clutch,Part ReadingPassage Two Power trainExercises,Manual trans

27、mission requires use of a _ to remove the engine torque to the transmission input shaft.,clutch,Part ReadingPassage Two Power trainExercises,The steering gear multiplies steering _ and changes its direction as received through the steering shaft from the steering wheel.,torque,Part ReadingPassage Tw

28、o Power trainExercises,The steering system is the means by which the driver of a vehicle is able to control the position of the _.,front wheels,Part ReadingPassage Two Power trainExercises,The _ provides a means of varying the relationship between the speed of the engine and the speed of the wheels.

29、 A. clutch B. drive shaft C. tire D. transmission,Part ReadingPassage Two Power trainExercises,The _ allows you to connect and disconnect the engine and the transmission both starting up and during shifts. A. clutch B. flywheel C. brake shoe D. cab,Part ReadingPassage Two Power trainExercises,Automo

30、bile _ must be able to stop the car, prevent excess speed when coasting, and hold the vehicle in position when stopped on grades. A. brakes B. engine C. transmission D. clutch,Part ReadingPassage Two Power trainExercises,Hydraulic brake systems utilize _ to transfer force from the drivers foot to the brake shoes. A. air B. solid C. liquid D. linkage,Part ReadingPassage Two Power trainExercises,Answer the following questions. 1. What is the function of the power train?,To carry power from the engine to the wheels.,Part ReadingPassage Two Power trai