時速跟轉速的關係 - 汽車
By Odelette
at 2018-08-01T06:16
at 2018-08-01T06:16
Table of Contents
之前推文有板友提到轉速跟時速的換算
所以小弟做了個excel
https://goo.gl/UTChpe
主要就是把輪胎週長算出來
(胎寬x扁平比x2+輪圈直徑)xPi
然候跟轉速除以減速比x:1去算速度
(轉速/(檔位減速比x終傳)x輪胎週長)=速度
雖然沒有計算修正因子(輪胎非正圓,變形等)
心裡想應該差不多吧
但是實際以馬三轉速算起來卻怪怪的
如圖
https://i.imgur.com/YxsBLSl.jpg
馬三在100km/h時,轉速為2190rpm
而2000轉時,GPS應該在91.3km/h
看滿多經驗談,說馴時速100km/h時轉速低於2000
跟算出來不一樣
想請各位版友看看,我是算法錯了,還是資料查錯
或是其實差不多
檔案連結在上面,主要就是輸入藍底資訊
然後就能用轉速算時速也可以反過來速度算轉速
(減速比為n:1)
先謝了
補充:後來發現我找錯資料,除了輪胎
也誤植了減速比,輸入到歐洲手排的
而且馴的資料市場不同都有不同
使用2017 155ps 2.0 skyactive G 北美的資料
https://i.imgur.com/x8wuURG.jpg
時速100時轉速約為1754rpm
2000轉可以開到GPS 114
有車主能驗證一下嗎?
--
所以小弟做了個excel
https://goo.gl/UTChpe
主要就是把輪胎週長算出來
(胎寬x扁平比x2+輪圈直徑)xPi
然候跟轉速除以減速比x:1去算速度
(轉速/(檔位減速比x終傳)x輪胎週長)=速度
雖然沒有計算修正因子(輪胎非正圓,變形等)
心裡想應該差不多吧
但是實際以馬三轉速算起來卻怪怪的
如圖
https://i.imgur.com/YxsBLSl.jpg
馬三在100km/h時,轉速為2190rpm
而2000轉時,GPS應該在91.3km/h
看滿多經驗談,說馴時速100km/h時轉速低於2000
跟算出來不一樣
想請各位版友看看,我是算法錯了,還是資料查錯
或是其實差不多
檔案連結在上面,主要就是輸入藍底資訊
然後就能用轉速算時速也可以反過來速度算轉速
(減速比為n:1)
先謝了
補充:後來發現我找錯資料,除了輪胎
也誤植了減速比,輸入到歐洲手排的
而且馴的資料市場不同都有不同
使用2017 155ps 2.0 skyactive G 北美的資料
https://i.imgur.com/x8wuURG.jpg
時速100時轉速約為1754rpm
2000轉可以開到GPS 114
有車主能驗證一下嗎?
--
Tags:
汽車
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