為什麼都是前輪碟煞?不是後輪碟煞? - 機車
By Ursula
at 2016-08-22T23:43
at 2016-08-22T23:43
Table of Contents
※ 引述《mevacol (咩瑪扣)》之銘言:
: 小弟最近在考慮買鼓煞 或是碟煞版的機車(勁豪125鼓煞 台南辦到好47000)
: 發現碟煞版的機車 幾乎都是前輪碟煞後輪鼓煞
: 而我們知道機車一般都是後輪動力 不是前輪動力
: 為什麼強力的碟煞 不是放在後輪 而是要放在前輪呢?
: 感覺前輪碟煞翻車的風險比較大耶!
基本上車輛煞車時依靠的是輪胎與地面的摩擦力(或稱「抓地力」)
依照國中理化教過得 最大靜摩擦力=靜磨擦係數*正向力
若是超過最大靜摩擦力就會開始滑動,在車輛上通常稱為「打滑」
而在煞車時,受慣性影響,全車的重心會前移
因此煞車時,前輪所承受的重量大於後輪,因此其正向力大於後輪
故前輪的最大靜摩擦力較大,安置煞車力道較強的碟煞位置當然以前輪為優先
若是前鼓後碟
則後輪碟煞可能煞車力道太強超過後輪的最大靜摩擦力,後輪打滑
若是顧慮此點而減弱煞車力道,則與前後雙股煞相比無明顯優勢
前碟後鼓則可充分發揮碟煞的優勢而無此顧慮
--------------------------------------------------------------------
看來最近真的太閒
--
: 小弟最近在考慮買鼓煞 或是碟煞版的機車(勁豪125鼓煞 台南辦到好47000)
: 發現碟煞版的機車 幾乎都是前輪碟煞後輪鼓煞
: 而我們知道機車一般都是後輪動力 不是前輪動力
: 為什麼強力的碟煞 不是放在後輪 而是要放在前輪呢?
: 感覺前輪碟煞翻車的風險比較大耶!
基本上車輛煞車時依靠的是輪胎與地面的摩擦力(或稱「抓地力」)
依照國中理化教過得 最大靜摩擦力=靜磨擦係數*正向力
若是超過最大靜摩擦力就會開始滑動,在車輛上通常稱為「打滑」
而在煞車時,受慣性影響,全車的重心會前移
因此煞車時,前輪所承受的重量大於後輪,因此其正向力大於後輪
故前輪的最大靜摩擦力較大,安置煞車力道較強的碟煞位置當然以前輪為優先
若是前鼓後碟
則後輪碟煞可能煞車力道太強超過後輪的最大靜摩擦力,後輪打滑
若是顧慮此點而減弱煞車力道,則與前後雙股煞相比無明顯優勢
前碟後鼓則可充分發揮碟煞的優勢而無此顧慮
--------------------------------------------------------------------
看來最近真的太閒
--
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