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後置後驅

後置後驅

後置發動機,後輪驅動佈局Rear-engine, Rear-wheel drive layout,縮寫RR),簡稱後置後驅,意指引擎放置在車尾,由後輪驅動整輛汽車的方式。

內燃機車

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早期廣泛運用在微型車,例如福斯金龜車菲亞特500等等,但是現代多運用在巴士上,而轎車已經很少使用。此方式的優點是結構緊湊,不需要沉重的傳動軸,而且也沒有複雜的前輪傳動兼驅動系統。缺點是因後軸負荷較大,在操控方面會發生與前置前驅相反的轉向過度。世界上採用此設置方式最出名的經典車款是保時捷911,其「甩尾」為車迷所津津樂道。

電動車

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現在,一些電動車也用後置後驅的設計,包括三菱iMiEVTesla Model STesla Model Y 後驅版等。

電動機的重量及冷凍需求較少,因此較易使用後置設計。

缺點

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由於引擎的位置位在後方,一旦發生事故時少了引擎作緩衝,大大增加司機和前座乘客的傷亡。同時也因軸負荷較大,在操控方面會發生與前置前驅相反的轉向過度。

參看

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相關條目

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後置後驅
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