煞車時應以前煞為主,後煞為輔 - 機車
By Mary
at 2016-08-10T21:47
at 2016-08-10T21:47
Table of Contents
當煞車開始作用時 因為慣性的原因
車體重心開始向前移動 也就是前輪的接地力(正向力)逐漸變大
同時後輪的正向力變小
在摩擦力(煞車力道的來源)正比於正向力的前提之下
前輪的最大靜摩擦力會變大 然後後輪的會變小
也就是說前輪相較於後輪能承受更大的煞車力道
而車輪打滑的發生就是發生在煞車力超過最大靜摩擦力的時候
再加上上面所說的 我們可以得知當煞車時
前輪較後輪更不容易發生打滑
因此才會說要以前煞為主後煞為輔
※ 引述《cynicalmon (分享個人訊息)》之銘言:
: 各位車友午安,
: 小弟菜B8下禮拜要考駕照,
: 做題庫時遇到某題目百思不得其解,
: 特地上來發文請教大家。
: 該題意思大概是‘煞車時應以前煞為主,後煞為輔,而且即使遭遇下坡仍應以前煞為主’
: 小弟之前的習慣是先煞後煞,再煞前煞,所以對這題目有疑問,
: 想請教各位原因,可以的話麻煩順便分享一下自己的煞車方式讓小弟我改進,感謝!!
--
車體重心開始向前移動 也就是前輪的接地力(正向力)逐漸變大
同時後輪的正向力變小
在摩擦力(煞車力道的來源)正比於正向力的前提之下
前輪的最大靜摩擦力會變大 然後後輪的會變小
也就是說前輪相較於後輪能承受更大的煞車力道
而車輪打滑的發生就是發生在煞車力超過最大靜摩擦力的時候
再加上上面所說的 我們可以得知當煞車時
前輪較後輪更不容易發生打滑
因此才會說要以前煞為主後煞為輔
※ 引述《cynicalmon (分享個人訊息)》之銘言:
: 各位車友午安,
: 小弟菜B8下禮拜要考駕照,
: 做題庫時遇到某題目百思不得其解,
: 特地上來發文請教大家。
: 該題意思大概是‘煞車時應以前煞為主,後煞為輔,而且即使遭遇下坡仍應以前煞為主’
: 小弟之前的習慣是先煞後煞,再煞前煞,所以對這題目有疑問,
: 想請教各位原因,可以的話麻煩順便分享一下自己的煞車方式讓小弟我改進,感謝!!
--
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