wheelsandtyres车轮和轮胎

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1、Wheelsandtyres车轮和轮胎wheel[wiːl]车轮tyre[‘taiə]轮胎hub[hʌb]轮毂nave[neiv]轮辐wheel[wi:l]rim[rim]轮辋bead[bi:d]胎圈belts[belts]带束层sidewall[‘saidwɔ:l]胎壁tread[tred]胎面Newwords&phraseswidth[widθ]宽度aspect[‘æspekt]ratio[’reiʃiəu]扁平比load[ləud]负荷loadrating载重指数speed[spi:d]速度diameter

2、[dai‘æmitə]直径inch[intʃ]英寸1英寸=2.54厘米FunctionWalkingparts行走部件Theyareconnectedtotheaxlesandareincontactwiththeroadsurface.Theyrotatearoundtheaxlesandrollontheroad.车轮和车胎连接车轴，接触地面，可以绕车轴转动并在地面滚动。Thetiresandwheelsmustsupportthevehicleweightfirstly.Thetiresarealsoreq

3、uiredtochangethevehicledirectionwhilethevehicleisinmotion.轮胎和车轮首先要能支撑车和装载的重量，同时要求在汽车行进时轮胎能够改变汽车的行驶方向。WheelsFunction:Supportthevehicle支承整车；Cushionofshocksfromroadsurface缓和由路面传来的冲击；Providedrivingandbrakingforcebyadhesionoftiresandroadsurface通过轮胎与路面间存在的附着作用产生驱动力

4、和制动力；ComponentsWheelrim轮辋Hub轮毂wheelnave轮辐轮毂TyresThetyreprovidesacushionbetweenthevehicleandtheroadtoreducethetransmissionofroadshocks.轮胎在汽车和路面之间作为垫带以衰减汽车在行驶时产生的振动。Italsoprovidesfrictiontoallowthevehicletoperformitsnormaloperations.同时它还提供了汽车正常行驶时所需要的摩擦力。Tyrety

5、pesTwotypesoftyreconstructionarecommon:radial-ply(R)&cross-ply（BiastireB)子午线轮胎VS斜交轮胎Radial-plytire:1946MichelinofFrancesoftsidewall&runscoolerthanacross-plytireandlongertreadlife散热性能好，可适应高温、高速行驶，胎面使用寿命长Bias-plytire:stiffsidewall&maketiresrunathightemperature胎

6、体牢固平稳，胎侧相对坚硬，产生摩擦和热量，高温运转，易磨损。子午线轮胎斜交轮胎TyrestructureBead(胎圈）：Steelcablecoatedwithrubber高强度的并涂有橡胶的钢丝圈Belts(带束层）：reinforcetheareaunderthetread加固胎面下方区域，防刺穿Body（胎体）：severallayersoffabrics胎体由几层不同的织物组成，(ply帘布层）Tread（胎面）：rubberSidewall(胎侧）：lateralstability&protectth

7、ebodypliesandhelpkeeptheairfromescaping保证轮胎横向稳定性，保护胎体帘布层并防止漏气Mostcartireshavetwobodyplies.大多数车用轮胎有两层胎体帘布层。TyreratingsAtyreratingisprintedonthesidewallofeverytyre.It’saseriesofnumbersandlettersthatgiveyouimportantinformationaboutthetyre.轮胎规格TiretypeP----passen

8、gervehicletyre客车轮胎LT----lighttruck轻型卡车T----temporaryorsparetires备胎Tyrewidth轮胎宽度Measuredfromsidewalltosidewall两胎侧之间的距离Inmillimeters(mm)以毫米为单位Aspectratio扁平比/高宽比H/W（℅）；Thesmallertheaspectrat