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當前位置: 中國卡車網 > 用車養車 > 用車技巧 >

車輛脫檔是哪里的問題?與油耗有關系嗎?小編來告訴你答案

發布時間:2019-02-13 09:07:56 分享 反饋
×
  目前國內還有很大一部分卡車使用的是手動變速箱,在駕駛中換檔是非常頻繁的一個操作,把握合適的換檔時機,選擇合適的檔位,對于車輛動力油耗都至關重要,但是還有一些人在駕駛中難免會出現拖檔的情況。

  什么是拖檔

  拖檔其實主要有兩種,第一種大家都非常熟悉了,就是高檔低速拖,也就是說在車速不夠達到檔位的情況下選擇了較高的檔位,或者沒有及時降檔。

  發動機轉速達不到該檔位所必須的轉速,從而影響車輛或者發動機的正常運轉,增加發動機的磨損、減少發動機的使用壽命,此現象常見于車輛起步或車輛在行進過程中。

發動機轉速達不到該檔位所必須的轉速發動機轉速達不到該檔位所必須的轉速

  第二種就是低檔高速拖,這個情況與上面的剛好相反,容易使發動機在過高的轉速狀況下運行。

  每種發動機都有自己特定的轉速——功率特性,一旦超過了最佳工況區域,就要急劇費油,同時,超速運轉對發動機部件也是過大的壓力。

  不論那種拖,都不是好現象,都會對機器造成壞的影響,都會費油。不論那種拖檔,長時間這種情況運轉的話,一方面油耗高,影響車輛經濟性,同時對發動機和變速箱都會造成損壞,影響車輛使用壽命。

  近幾年來,卡車發動機進入了電控時代,同時排量和馬力越來越大,經濟性也得到了不少提升,不少發動機都宣傳具有低轉速大扭矩的特點,轉速越低越省油。但是好多開習慣此前機械泵也就是我們俗稱大泵車型的朋友開始會有些不適應的情況。

  不少車型都配有瞬時油耗表,一些朋友會受此影響比較大,過度關注瞬時油耗大小,換檔轉速過低,導致換檔后轉速更低,這也會導致車輛在駕駛中出現拖檔的情況。

變速器變速器

  還有就是經濟轉速區間的理解不到位,經常選擇在較低轉速就換檔,在有些情況這樣也不合適的,其實換檔后轉速略高,然后收著油駕駛,對油耗控制也有會些幫助的。

  個別朋友由于長途駕駛中為了省力,換檔不及時勤快也會導致拖檔,進而導致油耗相應升高。

  總之,拖檔是一種非常不好的駕駛狀態,長期拖檔行駛對油耗經濟性也好,還是發動機、變速箱、車輛動力傳動系統都會產生很壞的影響,長期積累會導致車輛提前損壞。所以在駕駛中要根據路況、車速及時換檔,防止拖檔。

  • 閱讀量:
  • 來源:卡車維修第一站
  • 作者:樂楓
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