教学材料《汽车专业英语》-1.3 Crankshaft and Connecting Rod Assembly

1.3CrankshaftandConnectingRodAssemblyTitle孟思聪

Lead-inWehavelearnedtwoassembliesoftheengine.TwoassembliesEnginecrankshaftandconnectingrodassemblyValvetrainLead-inEnginecrankshaftandconnectingrodassemblyNewLessonDiscussionReadthefirsttwoparagraphsofpart1.3quickly,discussandfindouttheanswerstothefollowingquestions:1What’sthefunctionoftheenginecrankshaftandconnectingrodassembly?2Thecompositionofthisassembly.NewLesson1What’sthefunctionoftheenginecrankshaftandconnectingrodassembly?Enginecrankshaftandconnectingrodassemblyconvertsthermalenergyintomechanicalenergyusedtodrivethevehicle.（Page11,Para.1）热能机械能NewLesson2Thecompositionofthisassembly.EnginecrankshaftandconnectingrodassemblypistonspistonringsconnectingrodscrankshaftsNewLessonPiston活塞顶活塞凹坑活塞槽岸活塞槽活塞销孔活塞裙回油孔NewLessonPistonPistonapistonheadpistonringspistongroovespistonlandspistonskirtsapistonpinhole活塞顶活塞环活塞环槽活塞槽岸活塞裙活塞销孔pistoncrownpistontoppistonroofNewLessonlands活塞槽岸head活塞头ringgrooves活塞环槽skirt活塞裙pistonpin活塞销connectingrod连杆NewLessonPistonHeadItisthetopsurfaceagainstwhichtheexplosiveforceisexerted.flatheadconvexheadconcavehead（3types）[top,crown,roof]PistonRingsNewLessoncompressionrings（gasrings）oilcontrolrings（oilrings）Topreventtheair-fuelmixtureandexhaustinthecombustionchamberfromleakingintothesumpduringcompressionandcombustion.Tokeepoilinthesumpfromleakingintothecombustionarea,whereitwouldbeburnedandlost.NewLessoncompressionringoilcontrolringNewLessonConnectingRod连杆小头连杆大头杆身连杆盖螺栓NewLessoncompressionringsoff-controlringspistonpinpistonskirtconnectingrodconnectingrodboltconnectingrodbearinghalfshell(s)connectingrodcapNewLessonNewLessonCrankshaftNewLessonCrankshaft油道曲柄曲轴前端连杆轴颈主轴颈平衡重曲轴后端飞轮法兰三曲拐曲轴flywheelcrankshaft1.crankshafttimingpulley2.vibrationdamper3.fanbeltpulleyNewLessonbalanceshaft平衡轴crankshaftcrankshaftgear曲轴正时齿轮balanceshaftgear平衡轴齿轮sectionofbalanceweight平衡重部分sprocketwheel平衡轴链轮NewLessonBalanceShaft20FlywheelNewLessonWhatarethefunctionsoftheflywheel?1.keeptheenginerunsmoothly.2.meshwithteethofstarter.3.serveasthedrivingmember.NewLesson22Whatisthepurposeoftheflywheel?Tokeepthecombustionpulsesfromgeneratingavibration,aflywheelisattachedtothebackofthecrankshaft.NewLesson23Theschoolisattachedtoouruniversity.这所学校附属于我们大学。Awalkingsensorisattachedtoashoeoftheuser.步行传感器被安装在使用者的鞋上。NewLesson24Theflywheelusesinertiatosmoothoutthenormalenginepulses.Theinertiatendstokeeptheflywheelturningatconstantspeed.NewLesson25

rubberdamperflywheelcrankshaftfrontendVibrationDamperWhatisthefunctionofit?ThisdampingdevicecontrolstorsionalvibrationsSum