FORD Focus 變速箱過熱 失去動力 - 汽車

By Ursula
at 2017-04-22T04:27
at 2017-04-22T04:27
Table of Contents
原文吃光光~
原po你的車是Focus 1.6L NA, 查了規格
最大馬力125 hp/6300rpm
最大扭力16.2 kgm/4000rpm
輪胎205/60 R16
變速箱搭的是PowerShift 6速乾式雙離合器
找了一下這台車的spec,大概跟歐洲版的一樣
歐洲版的輪胎是搭205/55 R16 http://tinyurl.com/lqo2dds
不過變速箱應該是一樣的,所以齒輪比是可以參考的
3.917, 2.429, 1.605, 1.141, 0.867, 0.702
終傳比 4.58
輪胎圓周(205*60%*2+25.4*16)*pi/1000=2.05m
紅線轉速6500
所以各檔極速
=6500/齒輪比/終傳比*圓周/1000*60
一檔45,二72,三109,四153,五201,六249
依照轉速跟時速,得到這張圖表
http://imgur.com/UOYc8Np
原po第一個錯誤是捨棄1.0L Turbo車型,而選1.6L NA
1.0L最大扭力17.3 kgm/1400~4500 rpm,
假設2台齒輪比都一樣,1.0L你在這個轉速範圍都可以榨出最大扭力,
假設山路可用時速是20~60,你檔位掛在3檔已經可以涵蓋這段車速,
都是最大扭力,連換檔都不用,超級好開。但如果是1.6L NA,
最大扭力要到4000轉才有,有些陡坡你可得切到1,2檔才好爬。
第二個錯誤,捨SelectShift而選PowerShift乾式。
小弟雖然也是雙離合器的用戶,但我的是DSG DQ250濕式。
雖然雙離合器開起來真的很爽,換檔快、動力效率高,
但說真的我實在不敢買乾式的,畢竟乾式少了變速箱油來冷卻,
過於頻繁換檔很容易過熱。尤其大多數車主都是D檔到底,
D檔簡單講就是以省油為第一目標,轉速都很低就升檔了。
我不知道PS是幾轉升檔,但我猜應該1500~2000就升檔,
所以應該時速60幾就可以升到6檔(DQ250是如此)。
假設你用D檔,時速50,檔位在5檔,轉速1700,
遇到一個陡坡,全油門踩下去,電腦幫你降到3檔3000轉來爬坡,
爬完後收了油門,電腦立刻又幫你升回4->5檔。
D檔就是省油導向,你只要收油門,電腦一定就是幫你升到
可用的最高檔位,保持在低轉速。問題是這又是一台NA車,
轉速低根本超沒力。一旦你要爬坡覺得沒力,又重踩油門,
電腦又幫你降到可用的最低檔位,以便拉高轉速榨出高扭力。
你只要一直重複這種循環,離合器很容易就過熱,顧路給你看。
所以說山路請愛用S檔,拉高轉速才換檔,收油也不會馬上幫你升檔。
如果可以的話,最好用手動排檔,時速20~60的山路,這台大概就是
2, 3檔,轉速就維持在2000~4000轉,檔位不用一直換來換去,
轉速也比較靠近最大扭力,我相信如果你用手動換檔,你應該不會來
來發這篇顧車文。
--
原po你的車是Focus 1.6L NA, 查了規格
最大馬力125 hp/6300rpm
最大扭力16.2 kgm/4000rpm
輪胎205/60 R16
變速箱搭的是PowerShift 6速乾式雙離合器
找了一下這台車的spec,大概跟歐洲版的一樣
歐洲版的輪胎是搭205/55 R16 http://tinyurl.com/lqo2dds
不過變速箱應該是一樣的,所以齒輪比是可以參考的
3.917, 2.429, 1.605, 1.141, 0.867, 0.702
終傳比 4.58
輪胎圓周(205*60%*2+25.4*16)*pi/1000=2.05m
紅線轉速6500
所以各檔極速
=6500/齒輪比/終傳比*圓周/1000*60
一檔45,二72,三109,四153,五201,六249
依照轉速跟時速,得到這張圖表
http://imgur.com/UOYc8Np
原po第一個錯誤是捨棄1.0L Turbo車型,而選1.6L NA
1.0L最大扭力17.3 kgm/1400~4500 rpm,
假設2台齒輪比都一樣,1.0L你在這個轉速範圍都可以榨出最大扭力,
假設山路可用時速是20~60,你檔位掛在3檔已經可以涵蓋這段車速,
都是最大扭力,連換檔都不用,超級好開。但如果是1.6L NA,
最大扭力要到4000轉才有,有些陡坡你可得切到1,2檔才好爬。
第二個錯誤,捨SelectShift而選PowerShift乾式。
小弟雖然也是雙離合器的用戶,但我的是DSG DQ250濕式。
雖然雙離合器開起來真的很爽,換檔快、動力效率高,
但說真的我實在不敢買乾式的,畢竟乾式少了變速箱油來冷卻,
過於頻繁換檔很容易過熱。尤其大多數車主都是D檔到底,
D檔簡單講就是以省油為第一目標,轉速都很低就升檔了。
我不知道PS是幾轉升檔,但我猜應該1500~2000就升檔,
所以應該時速60幾就可以升到6檔(DQ250是如此)。
假設你用D檔,時速50,檔位在5檔,轉速1700,
遇到一個陡坡,全油門踩下去,電腦幫你降到3檔3000轉來爬坡,
爬完後收了油門,電腦立刻又幫你升回4->5檔。
D檔就是省油導向,你只要收油門,電腦一定就是幫你升到
可用的最高檔位,保持在低轉速。問題是這又是一台NA車,
轉速低根本超沒力。一旦你要爬坡覺得沒力,又重踩油門,
電腦又幫你降到可用的最低檔位,以便拉高轉速榨出高扭力。
你只要一直重複這種循環,離合器很容易就過熱,顧路給你看。
所以說山路請愛用S檔,拉高轉速才換檔,收油也不會馬上幫你升檔。
如果可以的話,最好用手動排檔,時速20~60的山路,這台大概就是
2, 3檔,轉速就維持在2000~4000轉,檔位不用一直換來換去,
轉速也比較靠近最大扭力,我相信如果你用手動換檔,你應該不會來
來發這篇顧車文。
--
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