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    江陵縣建筑工程機械_中特工程_建筑工程機械設備:
    四輪一帶廠家,四輪一帶,湖北中特

    后(hou)(hou)(hou)輪(lun)(lun)驅(qu)(qu)動(RWD):豪華(hua)轎車(che)通常采用后(hou)(hou)(hou)驅(qu)(qu),重(zhong)量分配接近(jin)于50∶50,提供(gong)了更(geng)平穩(wen)的駕(jia)駛。RWD與FWD驅(qu)(qu)動情況正相(xiang)反,操控性能有所提高(gao)。當加(jia)(jia)速(su)時車(che)身(shen)重(zhong)心向(xiang)后(hou)(hou)(hou)轉移,這正是(shi)你所希望(wang)的,因(yin)為后(hou)(hou)(hou)輪(lun)(lun)主管(guan)牽引力,前(qian)輪(lun)(lun)主管(guan)汽(qi)車(che)方向(xiang)。你還(huan)可(ke)以在彎(wan)道加(jia)(jia)速(su)。這并(bing)不是(shi)說RWD在結構上就好(hao),它也存在缺陷,如從前(qian)到后(hou)(hou)(hou)的傳動軸(使車(che)內地板從前(qian)到后(hou)(hou)(hou)隆起),還(huan)有一個很大(da)的差速(su)器(qi)在后(hou)(hou)(hou)部(bu),增加(jia)(jia)了重(zhong)量和成本,它同樣不適應全天候(hou)駕(jia)駛。


    ESC、TCS系統(tong)通(tong)過控(kong)(kong)制發動(dong)(dong)機動(dong)(dong)力輸(shu)出(chu)和制動(dong)(dong)系統(tong)來(lai)保證平(ping)穩駕駛,以(yi)損失(shi)動(dong)(dong)力作為安(an)全(quan)保證以(yi)防止超(chao)越物理(li)極限;AWD控(kong)(kong)制并調整每個車(che)輪(lun)的(de)(de)扭矩輸(shu)出(chu),在(zai)(zai)不(bu)干涉發動(dong)(dong)機動(dong)(dong)力輸(shu)出(chu)的(de)(de)情況下提(ti)高(gao)了(le)物理(li)極限,保證你全(quan)天候的(de)(de)駕駛樂趣。車(che)輛的(de)(de)驅(qu)動(dong)(dong)型式有FWD(Front-Wheel Drive)、RWD(Rear-Wheel Drive)、4WD(Four-Wheel Drive)和AWD(All-Wheel Drive)。我們先(xian)來(lai)看看這幾(ji)種驅(qu)動(dong)(dong)型式。前(qian)輪(lun)驅(qu)動(dong)(dong)(FWD):今天占(zhan)轎(jiao)車(che)產品的(de)(de)70%的(de)(de)經濟型及中級(ji)轎(jiao)車(che)都采用了(le)前(qian)輪(lun)驅(qu)動(dong)(dong)。就(jiu)像名字所暗示的(de)(de),只(zhi)有前(qian)輪(lun)傳遞動(dong)(dong)力。安(an)裝在(zai)(zai)前(qian)部的(de)(de)發動(dong)(dong)機將動(dong)(dong)力直接傳輸(shu)到前(qian)輪(lun),提(ti)高(gao)了(le)牽(qian)引效(xiao)率,60%~70%的(de)(de)重(zhong)量(liang)集中在(zai)(zai)轎(jiao)車(che)前(qian)部,提(ti)供了(le)更(geng)好(hao)的(de)(de)冰雪穩定性,但(dan)前(qian)輪(lun)要承受(shou)75%的(de)(de)制動(dong)(dong),而且在(zai)(zai)急加(jia)速(su)時車(che)身(shen)重(zhong)心(xin)后移,就(jiu)會造成加(jia)速(su)延遲,在(zai)(zai)操控(kong)(kong)上也存在(zai)(zai)著轉向過度和后輪(lun)打(da)滑現(xian)象。


    全(quan)(quan)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)也(ye)分兩種形式(shi):一種是(shi)(shi)全(quan)(quan)時(shi)全(quan)(quan)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong),即(ji)全(quan)(quan)部(bu)時(shi)間都是(shi)(shi)全(quan)(quan)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong);另一種是(shi)(shi)短時(shi)全(quan)(quan)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong),它可(ke)以切斷某個(ge)橋(qiao)(qiao)的(de)(de)(de)動(dong)(dong)(dong)(dong)力(li),以減少燃料消耗和(he)磨損,只在需要時(shi)再使用全(quan)(quan)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)。過(guo)去(qu)只有(you)越野車(che)采用4輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong),一般(ban)的(de)(de)(de)越野車(che),變(bian)速(su)(su)(su)器(qi)(qi)后(hou)面裝(zhuang)有(you)手動(dong)(dong)(dong)(dong)分離器(qi)(qi),前(qian)(qian)(qian)后(hou)車(che)軸各裝(zhuang)一個(ge)稱為驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)(qiao)的(de)(de)(de)部(bu)件。變(bian)速(su)(su)(su)器(qi)(qi)輸(shu)出的(de)(de)(de)扭(niu)矩(ju)通過(guo)分力(li)器(qi)(qi)和(he)傳動(dong)(dong)(dong)(dong)軸,分別傳遞(di)到前(qian)(qian)(qian)后(hou)車(che)軸上(shang)的(de)(de)(de)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)(qiao),再通過(guo)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)橋(qiao)(qiao)將(jiang)(jiang)扭(niu)矩(ju)傳遞(di)到輪(lun)(lun)(lun)子(zi)上(shang)。現(xian)在轎(jiao)車(che)的(de)(de)(de)馬力(li)都比較(jiao)大,加速(su)(su)(su)時(shi)重心后(hou)移,全(quan)(quan)車(che)重量就會(hui)向后(hou)軸移動(dong)(dong)(dong)(dong),造成前(qian)(qian)(qian)軸輕飄。前(qian)(qian)(qian)輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)的(de)(de)(de)轎(jiao)車(che)即(ji)使在良好的(de)(de)(de)路面上(shang)也(ye)會(hui)打滑(hua),4輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)就可(ke)以防止這種現(xian)象發生。轎(jiao)車(che)上(shang)的(de)(de)(de)4輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)裝(zhuang)置是(shi)(shi)常嚙(nie)合(he)(he)式(shi),增加了粘(zhan)性耦(ou)(ou)合(he)(he)器(qi)(qi),省去(qu)了手動(dong)(dong)(dong)(dong)分力(li)器(qi)(qi),自動(dong)(dong)(dong)(dong)將(jiang)(jiang)扭(niu)矩(ju)按需分配在前(qian)(qian)(qian)后(hou)輪(lun)(lun)(lun)子(zi)上(shang)。在正(zheng)常路面上(shang),4輪(lun)(lun)(lun)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)裝(zhuang)置將(jiang)(jiang)引擎輸(shu)出扭(niu)矩(ju)的(de)(de)(de)92%分配到前(qian)(qian)(qian)輪(lun)(lun)(lun),8%分配到后(hou)輪(lun)(lun)(lun);在滑(hua)溜的(de)(de)(de)路面上(shang),將(jiang)(jiang)至少40%的(de)(de)(de)引擎機(ji)輸(shu)出扭(niu)矩(ju)分配給(gei)后(hou)輪(lun)(lun)(lun);當前(qian)(qian)(qian)輪(lun)(lun)(lun)開始打滑(hua)時(shi),前(qian)(qian)(qian)、后(hou)輪(lun)(lun)(lun)的(de)(de)(de)轉(zhuan)速(su)(su)(su)差(cha)異(yi)會(hui)使耦(ou)(ou)合(he)(he)器(qi)(qi)中的(de)(de)(de)粘(zhan)液立即(ji)變(bian)稠并(bing)鎖住耦(ou)(ou)合(he)(he)器(qi)(qi),從而使傳動(dong)(dong)(dong)(dong)軸只將(jiang)(jiang)扭(niu)矩(ju)傳遞(di)至后(hou)輪(lun)(lun)(lun),待(dai)前(qian)(qian)(qian)、后(hou)輪(lun)(lun)(lun)的(de)(de)(de)轉(zhuan)速(su)(su)(su)差(cha)異(yi)消失就自動(dong)(dong)(dong)(dong)回復原有(you)驅(qu)(qu)(qu)(qu)動(dong)(dong)(dong)(dong)形式(shi)。

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