专业英语-4汽车底盘(一)

AutomobileEnglishTaskThreeAutomobileChassisObjectives1.Toknowabouttheimportanceoftheautomobilechassis;2.Tolearnthemainpartsoftheautomobilechassis;3.Tolearnthefunctionofthebrakingsystem,powertrain,steeringsystem,andsuspensionsystem.BackNext1BackNextPartⅠWarmupKnowaboutautomobilechassispowertrain传动系统steeringsystem转向系统Runninggear(suspensionsystem,wheels,tires)行驶系统（悬挂轮胎）brakingsystem制动系统chassisdifferential差速器Maindrivegear主驱动齿轮Driveshaft传动轴Transmission变速箱Clutch离合器BackNextPartⅠWarmupKnowaboutautomobilechassis1BackNextPartⅠWarmupKnowaboutautomobilechassis1BackNextPartⅠWarmupKnowaboutautomobilechassisGrasptheusefulwordsandphrasespulltooneside跑偏tireinflation胎压tirewear轮胎磨损PartⅡListeningandspeakingBackNextThefourmainsystemsofautomobilechassisarepowertrain(ordriveline)传动系,steeringsystem转向系,brakingsystem制动系andsuspensionsystem悬挂.PartⅢReadingPassageOneMainstructureofautomobilechassisBackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystem转向系统BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystemBackNextThesteeringsystemisthemeansbywhichthedriverofavehicleisabletocontrolthepositionofthefrontwheels.Thesystemmustprovideeaseofhandling,gooddirectionalcontrol,andstability.BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystemTherearetwotypesofthesteeringsystem,manualsteeringsystemandpowersteeringsystem.Powersteeringsystemincludeshydraulic（液压）powersteeringsystem,electricpowersteering(EPS)andelectrichydraulicpowersteeringsystem(EHPS).BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystemType:Mechanicalsteeringsystem机械转向系统Powersteeringsystem助力转向系统Hydraulicpowersteeringsystem液压助力转向系统Electroniccontrolpowersteering(EPS)Electro-hydraulicpowersteeringsystem(EHPS)PartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystemBackNextThekeycomponentsthatmakeupthesteeringsystemarethesteeringwheel,steeringcolumn,steeringshaft,steeringgear,pitmanarm（垂臂）,draglink（直拉杆）,steeringarm（转向节）,balljoints,andtie-rodassembly（横拉杆）.Hydraulicpowersteeringsystemsaddahydraulicpump,fluidreservoir,hoses,andeitherapowerassistunitmountedon,orintegralwithasteeringgearassembly.BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSteeringsystemBackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystem悬挂系统BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemSuspensionsystemhasthefollowingfunctions:Tokeepcar’swheelsinfirmcontactwiththeroad.Toprovideacomfortablerideforthepassengers.Toprovidesteeringstabilitywithgoodhandling.BackNextPartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemTherearethreefundamentalcomponentsofanysuspension:thesprings（弹簧）,shockabsorbers（减震器）andanti-swaybar(connectinglinkages)（横向稳定杆）.Withouttheseparts,thecomfortandeaseofdrivingwouldbereduced.Additionalwords:IndependentsuspensionDependentsuspensionNon-independentsuspensionPartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemBackNextCoilspring（螺旋弹簧）Leafspring（钢板弹簧）Torsionbar（扭力杆）Airspring（空气弹簧）PartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemBackNextElectroniccontrolsuspensionsystemActivesuspensionsystemSemi-activesuspensionsystemSpringstiffness弹簧刚度PartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemBackNextWheelalignment四轮定位Wheelcamber（前轮外倾角）KingpinCaster（主销后倾角）KingpinInclination（主销内倾角）Toe-in（前束）PartⅢReadingPassageOneMainstructureofautomobilechassisSuspensionsystemBackNextBackNextPartⅢReadingPassageOneMainstructureofautomobilechassisBrakingsystem（制动系统）Automobilebrakesmustbeabletostopthecar,preventexcessspeedwhencoasting,andholdthevehicleinpositionwhenstoppedongrades.Eachvehiclemusthavetwoindependentbrakesystemsforsafety.Themainbrakesystemisservicebrakesystem（主制动系统）.Thesecondaryisparkingbrakesystem（驻车制动）.PartⅢReadingPassageOneMainstructureofautomobilechassisBrakingsystem①brakepedal制动踏板②mastercylinder制动总泵③brakeline制动油管④wheelcylinder制动分泵⑤brakedrum制动鼓⑥brakelining制动蹄片⑦brakeshoe制动蹄⑧brakeshoereturnspring回位弹簧⑨wheelcylinderpiston车轮油缸活塞⑩mastercylinderpiston主缸活塞⑾pushrod推杆PartⅢReadingPassageOneMainstructureofautomobilechassisBrakingsystemBackNextAnti-lockBrakingSystemBackNextPartⅢReadingPassageOneMainstructureofautomobilechassisBrakingsystemBackNextPartⅢReadingPassageOneMainstructureofautomobilechassisBrakingsystemThepowertrain（传动系）carriespowerfromtheenginecrankshafttothecarwheels,sothewheelsrotateandthecarmoves.BackNextPartⅢReadingPassageTwoPowertrainpowertrainsteeringsystemRunninggear(suspensionsystem,wheels,tires)brakingsystemchassisdifferentialMaindrivegearDriveshafttransmissionclutchBackNextPartⅢReadingPassageTwoPowertrainrear-wheeldrivelinessystemPartⅢReadingPassageTwoPowertrainBackNextclutchManualtransmissionuniversaljointMaindrivegeardifferentialdriveshaftdriveaxlehousingwheelaxleBackNextengineAutomatictransmissiondriveshaftdifferentialEngineFRdrivesketchmapPartⅢReadingPassageTwoPowertrainAngledriveUniversaldriveDriveaxleGoforwardtransmiss