油電車定速有比較省油嗎? - 常識
By Hedy
at 2020-04-04T10:16
at 2020-04-04T10:16
Table of Contents
43
直接點名
joshau,wumingxian,xdctjh,tseng413121
hardylee,LexusNo1
以上鍵盤油電專家。
先來解釋馬達,馬達跟引擎一樣,有最大工作轉速,也類似引擎那樣,超過一定轉速後,
雖然轉速還可以繼續攀升,但輸出功率會開始下降。且馬達的曲線一般比引擎要來得陡。
這是為什麼引擎需要變速箱來增加輸出轉速(得到更高極速)的原因。這常識就不多提了。
當轉速需求(時速)超過馬達能力轉速後,除非有變速箱,不然車速就無法再提升了。就
如同200p的引擎一檔油門給到底,不給換檔,極速就是那樣的原理相同。
這是為什麼油電車會有一個純電極速的原因
那來說到本主題的Camry 油電。
豐田的油電車使用ECVT作為動力分配系統,同時也用做變速箱使用。
https://kknews.cc/car/p4eeryz.amp
ECVT的運作原理網路上隨便找都一大堆
隨便google來一篇,建議被點名到的鍵盤油電專家認真看一下。
https://i.imgur.com/VHxnsZf.jpg
當高速行駛時,MG1會反轉,引擎運作,MG2會被迫帶動至高於MG2最大轉速
此時MG2作為發電機,MG1作為電動機
這兩顆馬達在這個狀態下只用來維持ECVT當下的變速比,MG2的發電全用來供應MG1,MG1的
輸出只用來維持變速比(類似作為支點的概念)
MG1這時的輸出並不用來帶動車輪,這是這套系統的運作原理。
所有車輪得到的動力,完全來自引擎供應。
這裡還有兩個重點
理論上此時MG2的發電只供應給MG1使用,但因為發電效率跟電能轉動能的效率。
所以MG2的發電並不足以供應MG1使用。
因此MG1還會逐漸消耗動力電池的電力。
而動力電池的電力補充,就跟一般概念一樣,要嘛趁減速時動能回充,要嘛分配引擎輸出
來充電。
另一個重點,當此時的MG2轉速大於純電極速。即使動力電池的電力充足,MG2也無法輸出
任何動力給車輪。
引申到實際使用狀況,即使在高速行駛中,因為路況讓動力電池有回充的機會,即使動力
電池充得滿滿的,只要車速高於純電極速,馬達就沒有能力輸出動力,因為已經超過最大
輸出轉速。
而ECVT這套系統作為變速箱邏輯時,是給引擎變速用的,並不是給馬達變速
你那裡的平行時空油電技術比較厲害
聽說是豐田那套油電系統
→ tseng413121: 油電高速是純油??哪來的腦補 04/03 20:02
不知你的油電高速馬達能輸出又是哪裡腦補來的?
--
小時候以為大便是裝在屁股裡,唸書以後才知道大便是裝在肚子裡。
現在才發現,有些人是裝在腦袋裡
--
直接點名
joshau,wumingxian,xdctjh,tseng413121
hardylee,LexusNo1
以上鍵盤油電專家。
先來解釋馬達,馬達跟引擎一樣,有最大工作轉速,也類似引擎那樣,超過一定轉速後,
雖然轉速還可以繼續攀升,但輸出功率會開始下降。且馬達的曲線一般比引擎要來得陡。
這是為什麼引擎需要變速箱來增加輸出轉速(得到更高極速)的原因。這常識就不多提了。
當轉速需求(時速)超過馬達能力轉速後,除非有變速箱,不然車速就無法再提升了。就
如同200p的引擎一檔油門給到底,不給換檔,極速就是那樣的原理相同。
這是為什麼油電車會有一個純電極速的原因
那來說到本主題的Camry 油電。
豐田的油電車使用ECVT作為動力分配系統,同時也用做變速箱使用。
https://kknews.cc/car/p4eeryz.amp
ECVT的運作原理網路上隨便找都一大堆
隨便google來一篇,建議被點名到的鍵盤油電專家認真看一下。
https://i.imgur.com/VHxnsZf.jpg
當高速行駛時,MG1會反轉,引擎運作,MG2會被迫帶動至高於MG2最大轉速
此時MG2作為發電機,MG1作為電動機
這兩顆馬達在這個狀態下只用來維持ECVT當下的變速比,MG2的發電全用來供應MG1,MG1的
輸出只用來維持變速比(類似作為支點的概念)
MG1這時的輸出並不用來帶動車輪,這是這套系統的運作原理。
所有車輪得到的動力,完全來自引擎供應。
這裡還有兩個重點
理論上此時MG2的發電只供應給MG1使用,但因為發電效率跟電能轉動能的效率。
所以MG2的發電並不足以供應MG1使用。
因此MG1還會逐漸消耗動力電池的電力。
而動力電池的電力補充,就跟一般概念一樣,要嘛趁減速時動能回充,要嘛分配引擎輸出
來充電。
另一個重點,當此時的MG2轉速大於純電極速。即使動力電池的電力充足,MG2也無法輸出
任何動力給車輪。
引申到實際使用狀況,即使在高速行駛中,因為路況讓動力電池有回充的機會,即使動力
電池充得滿滿的,只要車速高於純電極速,馬達就沒有能力輸出動力,因為已經超過最大
輸出轉速。
而ECVT這套系統作為變速箱邏輯時,是給引擎變速用的,並不是給馬達變速
→ wisdom: 油電高速時是純油,省油方式跟一般油車原理相同。04/03 18:47
推 joshau: 定速還是比油車省油,油電車引擎啟動並不會只有引擎的動力04/03 18:50
→ joshau: 電力也是會做輔助04/03 18:50
Camry 油電,純電極速不到100,就算有多餘的電力,也無法讓馬達輸出動力給車輪 → wumingxian: 油電高速是純油??哪來的平行時空04/03 18:51
→ wumingxian: 油電車在高速時馬達跟引擎會同時運作,哪來的純油?? 04/03 18:51 你那裡的平行時空油電技術比較厲害
→ joshau: 一樓是油電盲吧04/03 18:54
鍵盤油電專家?是你嗎? → xdctjh: 1樓是哪個遠古油電車?
聽說是豐田那套油電系統
→ tseng413121: 油電高速是純油??哪來的腦補 04/03 20:02
不知你的油電高速馬達能輸出又是哪裡腦補來的?
→ wumingxian: 時速100為何不能用馬達?? 油電車高速運作下,電池會持04/03 20:16
→ wumingxian: 續隨著馬達啟動而充放電,馬達跟引擎高速下會同時輸出04/03 20:17
→ wumingxian: 動力,就算高速整體油耗還是比純油車好!04/03 20:18
→ wumingxian: 建議買台油電車看看高速下的能源監控顯示吧! 多說無益04/03 20:19
→ wumingxian: 加速幅度不大,油電車高速下也會關閉引擎靠馬達動力04/03 20:21
→ wumingxian: 待電量不足或加速時油門深踩再啟動引擎來使油耗最佳化04/03 20:22
→ wumingxian: 只能說油電車電控系統遠比你想得還有料!不是只有純油04/03 20:25
→ wumingxian: 或純電動馬達這種二分法!!04/03 20:26
推 hardylee: 一樓油電盲幫Q04/03 23:00
鍵盤油電專家+1 → LexusNo1: 自己踩比較省+1,油電盲不要自己出來秀下限,乖。04/03 23:09
+2 --
小時候以為大便是裝在屁股裡,唸書以後才知道大便是裝在肚子裡。
現在才發現,有些人是裝在腦袋裡
--
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