為何油車鏈條比皮帶耐用 電車則相反? - gogoro
By Noah
at 2021-03-06T06:29
at 2021-03-06T06:29
Table of Contents
我認為可以從下列幾點來討論
1.扭力
Gogoro的扭力真的有比較大嗎?其實沒有,拿數據來討論
Gogoro最大扭力 25/205 Nm(馬達/輪上),150檔車引擎最大扭力大約也就15 Nm
只看引擎數字的確大很多,但實際作用在鏈條上還是要看輪上扭力
檔車有變速箱會將扭力放大,總共會放大三次
一次減速比抓3,一檔齒比抓2.5,二次減速比抓2.7,15*3*2.5*2.7=303 Nm
算起來還比Gogoro大許多,但一般下不會拉轉到最大扭力才起步
所以一般騎法下,檔車的輪上扭力是比Gogoro小,但是拉轉彈離合可以比Gogoro大
2.動力輸出特性
電動機的特性就是最大扭力很快到達,起步後很快就可以到最大扭力
可以說是從起步時就用最大力量在拉扯鏈條,維持住最大扭力一段時間才開始下降
引擎的扭力輸出跟轉速成正相關,直到最大扭力才開始下降
在起步加速拉轉到最大扭力的過程中,輪上扭力是漸增到最大扭力的
但是一般騎法下不會拉到最大扭力才換檔降轉速
所以一般騎法下,檔車的輪上扭力是到不了最大扭力的
3.緩衝系統
Gogoro後齒盤上有齒盤襯套再接後輪,我看圖橡皮厚度也不寬
但是檔車起步時有離合器可以緩衝一次動力,加上後齒盤上又有減震橡皮二次緩衝
減震橡皮的厚度比Gogoro的襯套大多了,效果應該好很多
同樣在加減速的過程中,檔車鏈條上的作用力會比Gogoro鏈條和緩許多
所以綜合以上幾點,如果檔車鏈條想要模擬Gogoro鏈條使用環境的話
每次起步時要拉轉到最大扭力,再彈離合起步,然後一直拉到最大扭力才換檔
加減速的過程中要一直控制檔位在最大扭力轉速附近騎,感覺跟下賽道沒兩樣
加上輪上扭力又比Gogoro大,問題可能就會變成為何電車鏈條比油車耐用了
--
Tags:
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