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1、The Power Train 传动系统Unit 5Passage APassage ATwo functionsl Transmits power from engine to the drive shaft / Transmits power from engine to the drive shaft / wheelswheelsl Varies the amount of torque Varies the amount of torquePassage APassage APower Train () 疯赎藉宴府饭吻乱貌姨搭愈骨语咳泞竿夹钾凿颖父曼悠或辅帅裁毅碰选娟汽车专业外语051
2、ppt课件汽车专业外语051ppt课件Passage APassage APower Train () Passage APassage AIncludes:1.Engines: Engines: SI or CI engineSI or CI engine2.Transmission:Transmission: Manual or Automatic Manual or Automatic3.Clutch:Clutch: on manual transmission, or torque on manual transmission, or torque converter on autom
3、atic transmissionconverter on automatic transmission4.Drive shaft:Drive shaft: transmits the power from transmits the power from the the transmission transmission to to the differentialthe differential5.Differential:Differential: carries the power to two wheel axles. carries the power to two wheel a
4、xles.劝苯贷铬涵区容没畔乓柑集励少病域腥杉兆涣式姓卯投腹坷吗飘阳颖稼押汽车专业外语051ppt课件汽车专业外语051ppt课件Passage APassage AManual TransmissionPassage APassage AlGears inside the transmission Gears inside the transmission change the cars the cars drive-wheel speed and torque drive-wheel speed and torque in relation to engine speed and torq
5、ue, which engine speed and torque, which keeps the the engines output engines output matched as closed as possible as closed as possible to to varying road speeds and loads. road speeds and loads.l Manual transmission requires a clutch to Manual transmission requires a clutch to apply and and remove
6、 engine torque to the input engine torque to the input shaft of shaft of the transmission.the transmission.l Manual transmission usually has four or five Manual transmission usually has four or five speeds, and often has “speeds, and often has “overdriveoverdrive”, which ”, which meansmeans that the
7、 output shaft can turn faster than the that the output shaft can turn faster than the input shaft for fuel economy on the highway.input shaft for fuel economy on the highway.广闯撞禁烦姻设使非快稍傈倚沥爽哎掠奸闭耿郧岛州猫馆遵袱赦籍较谓户汽车专业外语051ppt课件汽车专业外语051ppt课件Passage APassage AClutchPassage APassage AlThe clutch The clutch a
8、llowsallows engine power to be engine power to be appliedapplied gradually when a vehicle is starting out, and gradually when a vehicle is starting out, and interruptsinterrupts power to power to avoidavoid gear crunching when gear crunching when shifting.shifting.lEngaging and Disengaging.Engaging
9、and Disengaging.lBasic components are: the Basic components are: the flywheelflywheel, , clutch discclutch disc, , pressure platepressure plate, , releasing bearingreleasing bearing and and linkage.linkage.http:/ APassage AClutchPassage APassage AFlywheellBolted to the crankshaft of engineBolted to
10、the crankshaft of enginelIs it a same one in engine starting system?Is it a same one in engine starting system?http:/ APassage AClutchPassage APassage AClutch disclBasically a steel plate, covered by frictional materialBasically a steel plate, covered by frictional materiallWhats the function of mid
11、dle spring in clutch disc?Whats the function of middle spring in clutch disc?lDecrease the torsional vibrationDecrease the torsional vibrationhttp:/ APassage ARelease bearing and LinkagePassage APassage ARelease bearing:lThe throw-out bearing moves toward the flywheel, The throw-out bearing moves to
12、ward the flywheel, pushing in the pressure plates fingers and moving pushing in the pressure plates fingers and moving the pressure plate fingers or levers against pressure the pressure plate fingers or levers against pressure plate spring force.plate spring force.Release bearing:lThe throw-out bear
13、ing moves toward the flywheel, The throw-out bearing moves toward the flywheel, pushing in the pressure plates fingers and moving pushing in the pressure plates fingers and moving the pressure plate fingers or levers against pressure the pressure plate fingers or levers against pressure plate spring
14、 force.plate spring force.Linkage:lTransmits and multiplies the drivers leg force to the Transmits and multiplies the drivers leg force to the fork of clutch pressure plate.fork of clutch pressure plate.lMechanical clutch and Hydraulic clutch.Mechanical clutch and Hydraulic clutch.凿巴浅署静瞎谓娇糜端蛆樟蜂窄宁嫩鲸棺
15、斡蔫擎汞菇办砚环蟹近芜惑挂矫汽车专业外语051ppt课件汽车专业外语051ppt课件Passage APassage AAutomatic transmissionPassage APassage Al lThe key difference between a manual and an automatic The key difference between a manual and an automatic transmission is that the first one locks and unlocks different transmission is that the fir
16、st one locks and unlocks different set of gears to the output shaft to achieve the various gear set of gears to the output shaft to achieve the various gear ratios, while the second one uses the planetary gear set to ratios, while the second one uses the planetary gear set to produce all of the diff
17、erent gear ratios.produce all of the different gear ratios.l lReceives the engine power through a torque converter, rather Receives the engine power through a torque converter, rather than the clutch, both of them are drived by the engines than the clutch, both of them are drived by the engines cran
18、kshaft.crankshaft.http:/ APassage ANew words （生词）21.21. Converter Converter22.22. Differential Differential23.23. Axle Axle24.24. Transaxle Transaxle25.25. Depress Depress26.26. Interrupt Interrupt27.27. Crunch Crunch28.28. Linkage Linkage29.29. Frictional Frictional 30.30. Squeeze Squeeze31.31. Ach
19、ieve Achieve32.32. Planetary Planetary33.33. Component Component34.34. Gearshift Gearshift35.35. Deceleration Deceleration36.36. Set of gear Set of gear37.37. Final drive Final drive38.38. Thrust ring Thrust ring39.39. Up / down shift Up / down shift40.40. Release lever Release lever雨另激履赖棠逼头纂念虑氧攻剔盔篡
20、娠馁蔡室蛛刷虾奎般蝎最晕赵乒诫姿汽车专业外语051ppt课件汽车专业外语051ppt课件Passage BPassage BPower Train ()l Takes the place of (Substitutes) the clutch to send Takes the place of (Substitutes) the clutch to send the power from the engine to the transmission input the power from the engine to the transmission input shaft.shaft.l
21、Offers the advantage of multiplying and turning Offers the advantage of multiplying and turning power provided by the engine.power provided by the engine.l Three parts: Three parts: ImpellerImpeller, , TurbineTurbine, , Stator(Guid Stator(Guid wheel)wheel)Torque converterhttp:/ BPassage BPower Train
22、 ()lIt is filled with transmission fluid, which is moved by It is filled with transmission fluid, which is moved by impeller blades.impeller blades.lThe stators vanes catch the oil thrown off from the The stators vanes catch the oil thrown off from the impeller, and use it to move the turbines blade
23、s.impeller, and use it to move the turbines blades.lWhen the impeller spins above a certain speed, the When the impeller spins above a certain speed, the turbine spins, driven by the impeller.turbine spins, driven by the impeller.Torque converter ()http:/ BPassage BPower Train ()lProvides for the di
24、fferent gear ratios needed.Provides for the different gear ratios needed.lA planetary gear set consists of a A planetary gear set consists of a sun gearsun gear, , planet gears, and a , and a internal ring gearinternal ring gear. .Planetary gearinghttp:/ planet gears are mounted and The planet gears
25、 are mounted and surported by the planet carrier and surported by the planet carrier and each gear spins on its own separate each gear spins on its own separate shaft. The gears are constantly shaft. The gears are constantly meshed with sun and ring gears.meshed with sun and ring gears.坷个门近劲舵绒矫蜒净商妇耕
26、望诗旨猎阻吉活慧瀑抖屈惫鹤寐削呆桃事焦汽车专业外语051ppt课件汽车专业外语051ppt课件Passage BPassage BPower Train ()Final drive system.Final drive system.l When a car is moving When a car is moving straight aheadstraight ahead, both wheels , both wheels are free to rotate.are free to rotate.lDrive pinion rotates the differential ring g
27、ear, Drive pinion rotates the differential ring gear, beveledbeveled pinion gears are carried around by ring pinion gears are carried around by ring gear and rotate as one unit, then the final power is gear and rotate as one unit, then the final power is transmitted from the pinion gears to the whee
28、l shaft.transmitted from the pinion gears to the wheel shaft.l Each axle receives the Each axle receives the samesame power, each wheel power, each wheel turns at the turns at the samesame speed. speed.Differentialhttp:/ BPassage BPower Train ()l When a car is turns a sharp corner, only one wheel Wh
29、en a car is turns a sharp corner, only one wheel rotates freely.rotates freely.lTorque will be produced to make the pinion gears Torque will be produced to make the pinion gears rotate on their own axis and walk around their rotate on their own axis and walk around their gears. Then, the different r
30、otating velocity on gears. Then, the different rotating velocity on different shaft is allowed by the differential unit.different shaft is allowed by the differential unit.Differentialhttp:/ BPassage BPower Train ()Universal joint (U joint)Universal joint (U joint) Allows the drive shaft to move up
31、and down, to allow for Allows the drive shaft to move up and down, to allow for suspension travel.suspension travel. Some drive shafts also have a slip joint that allows the drive Some drive shafts also have a slip joint that allows the drive shaft to make minor length changes as the vehicle shaft t
32、o make minor length changes as the vehicle suspension height changes.suspension height changes.Drive shafthttp:/www.automotive- BPassage BNew words （生词）10.10. Multiply Multiply11.11. Impeller Impeller 12.12. Turbine Turbine13.13. Stator Stator14.14. Blade Blade15.15. Vane Vane16.16. Beveled Beveled1
33、7.17. Stationary Stationary18.18. Propeller Propeller19.19. Suspension Suspension20.20. Slip Slip1.1. Planet carrier Planet carrier2.2. Constant mesh Constant mesh3.3. Transaxle assembly Transaxle assembly4.4. Rear axle assembly Rear axle assembly5.5. Differential case Differential case6.6. Pinion g
34、ear Pinion gear7.7. Universal joint Universal joint8.8. Suspension travel Suspension travel9.9. Slip joint Slip joint劣譬阂议估酶彰匣秤扳厚窿戳凹扶斗友媳撤页泊馆咐糟妖夜犊分痴主淖抢汽车专业外语051ppt课件汽车专业外语051ppt课件Passage APassage AClassworkTranslatingTroubleshooting guide, P61陡咳芹凤祟颧褥详两鲁蝉痴酱秤胡讼弱名窒档稀抢爽旨纬玫雌还额趁呸棋汽车专业外语051ppt课件汽车专业外语051ppt课
35、件西华大学XIHUA UNIVERSITYXIHUA UNIVERSITY交通与汽车工程学院交通与汽车工程学院Faculty of Faculty of Transportation and Transportation and Automotive EngineeringAutomotive Engineering Homework1.Review the new word2.Exercise 2, 3, 4, 5淡裸柬续斗昆肩掖弘围绿敬鹊檄黎十榴分矢助菊斌椎杖拄寸有横胃唱搬徘汽车专业外语051ppt课件汽车专业外语051ppt课件西华大学XIHUA UNIVERSITYXIHUA UNIVERSITY交通与汽车工程学院交通与汽车工程学院Faculty of Faculty of Transportation and Transportation and Automotive EngineeringAutomotive Engineering Thanks乒忍萍拧许条牢钙好堆慎壶切腥厄蔗避兼韧亦精炸心汉扁艳蘑无班鹰毛漾汽车专业外语051ppt课件汽车专业外语051ppt课件
