後驅操控是好在哪? - 汽車
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By Delia
at 2016-11-18T14:36
at 2016-11-18T14:36
Table of Contents
車輛轉彎時,視不同的驅動方式會有兩種表現方式
轉向不足以及轉向過度
從下圖來說
http://i.imgur.com/YBnBuwP.png
當驅動力與離心力的合力大於輪胎抓地力時,輪胎會往合力方向滑出去
FF的驅動輪以及轉向輪均位於前輪,
後輪無驅動力輸出,僅靠前輪的拉力帶動,所以當驅動輪受到的合力超過輪胎抓地力時,
驅動輪(前輪)會帶著後輪一起往合力方向(彎道外側)移動,也就是所謂的推頭、轉向不足
而FR的驅動輪(後輪)與轉向輪(前輪)是分開的,前輪是受到後輪的推力,
所以當驅動輪的合力超過輪胎抓地力時,後輪沿合力方向滑動,
但仍保有向前推的驅動力,故轉向輪仍會持續受到推力而往彎道內側移動,
是為轉向過度
而4WD由於4輪均有驅動力,如假設4輪驅動力均等或前輪驅動力大於後輪時,
會有轉向不足的現象,反之後輪驅動力大於前輪驅動力時會偏向轉向過度的特性
所以後驅操控性到底好不好?
以極限操控的狀況下來說,是優於前驅的,但在基本行駛的狀況之下,
開什麼都一樣啦XD
--
轉向不足以及轉向過度
從下圖來說
http://i.imgur.com/YBnBuwP.png
當驅動力與離心力的合力大於輪胎抓地力時,輪胎會往合力方向滑出去
FF的驅動輪以及轉向輪均位於前輪,
後輪無驅動力輸出,僅靠前輪的拉力帶動,所以當驅動輪受到的合力超過輪胎抓地力時,
驅動輪(前輪)會帶著後輪一起往合力方向(彎道外側)移動,也就是所謂的推頭、轉向不足
而FR的驅動輪(後輪)與轉向輪(前輪)是分開的,前輪是受到後輪的推力,
所以當驅動輪的合力超過輪胎抓地力時,後輪沿合力方向滑動,
但仍保有向前推的驅動力,故轉向輪仍會持續受到推力而往彎道內側移動,
是為轉向過度
而4WD由於4輪均有驅動力,如假設4輪驅動力均等或前輪驅動力大於後輪時,
會有轉向不足的現象,反之後輪驅動力大於前輪驅動力時會偏向轉向過度的特性
所以後驅操控性到底好不好?
以極限操控的狀況下來說,是優於前驅的,但在基本行駛的狀況之下,
開什麼都一樣啦XD
--
Tags:
汽車
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