汽车专业英语(幻灯片)chapter 4 body

《汽车专业英语(幻灯片)chapter 4 body》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、BodyQuestion1:ListthetypesofBODY.separateframeconstructionunitizedbodyconstructionsemi-integralbodyconstructionAseparateframemustbelightyetstrongenoughtoresistthevariousloadsandroadforces.Commercialvehiclesnormallyuseaseparatesteelframetoprovidetherigidityneededtosupportthevariousloads.Thetwolongsid

2、emembersofchannelsectionarerivetedtoanumberofcrossmemberstogivealowweightframewhichoffersgreatresistancetobending,twisting.分离式车架必须足够轻巧而且结实，以承受变化的载荷和路面作用力。商用车通常使用分离式钢质车架，以获得较好的刚度来承受变化的载荷。两根槽形的长纵梁铆接着很多横梁，这使车架重量较轻，具有较好的抗弯和抗扭能力。Mostcarsuseaunitizedbodyconstruction,acombinedbodyandframe.Unitizedbodyconst

3、ructionislighterthanbody/frameconstruction,butnoisier.Rubbermountsareusedbetweenthebodysectionandmechanicalpartstoabsorbvibrations.Thefloorpanismadeofsectionsthatsupporttherearsuspensionandthetransmission.多数轿车采用承载式车身，也就是车身和车架融为一体。承载式车身比非承载式车身质量轻，但噪声大。在车身和机械部件之间安装橡胶块以吸收振动。地板由一些支撑后悬架和变速器的部件组成。Modernca

4、rshaveablend-airsystemthatmixeswarmandunwarmedairtoheatthecar.The"heart''ofthesystemistheheatercore.Hotenginecoolantflowsfromtheradiator,throughthewaterpumphoses,andtotheheatercore.Therefore,theheatercoreisalwayshot.Thetemperatureofairenteringthepassengercompartmentiscontrolledbytheamountofairmoving

5、throughtheheatercore.Thisheatedairisblendedwithfresh,coolairthatbypassestheheater.Smalldoorsintheheatingsystemregulatetheair-flow.Controlleversonthedashpanelopenandclosethesedoorstodirectairtotheheatductsandwindowdefrosters.多数汽车采用加热过的或未加热过的空气的混合起来加热汽车。暖风系统的核心是热芯。热的冷却水来自散热器，通过水泵软管流到热芯。这样，热芯总是热的。流经热芯的

6、空气数量控制着进入车厢的空气温度。加热后的空气同流经加热器的新鲜冷空气混合。加热系统中的一些小风门控制空气的流量。前围板上的控制杆开启和关闭这些风门，从而将空气引入输热管和风窗除霜器。Thepurposeofventingsystemsistodrawinfreshairandremovestaleairfromtheinteriorofthecar.Freshairventingsystemsdirectairtotwodifferentplaces.First,theycandirectoutsideairintotheheaterhousing.Thisaireithercanbypas

7、sthecoiloritcanbeheatedbythecoil.Second,theaircanmovedirectlyintothepassengercompartmentthroughsmallventdoorsinthedashpaneloratfloorlevel.Ventingalsocantakeplacebyopeningthewindows.通风系统吸入新鲜的空气，排除车内不新鲜