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仙桃市四輪一帶_中特工程(在線咨詢)_推土機四輪一帶：

四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)（4 Wheel Drive)主變速(su)器通(tong)(tong)過一個輔助變速(su)器將動(dong)(dong)(dong)力傳送(song)(song)到(dao)前輪(lun)(lun)和(he)后輪(lun)(lun). 輔助變速(su)器通(tong)(tong)常有(you)三檔(dang)(dang)選(xuan)擇； 空檔(dang)(dang)，四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)，四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)低(di)檔(dang)(dang)。空檔(dang)(dang)時，四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)就變成了(le)兩輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)。四(si)輪(lun)(lun)驅(qu)(qu)(qu) 動(dong)(dong)(dong)適(shi)合于(yu)惡劣的路面駕(jia)(jia)駛(shi)，例如(ru)，雨雪(xue)天和(he)多沙石路面。四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)低(di)檔(dang)(dang)則適(shi)合高難(nan)度的越(yue)野駕(jia)(jia)駛(shi)。全(quan)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong) (All Wheel Drive)全(quan)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)是四(si)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)的一種. 它(ta)自動(dong)(dong)(dong)將發動(dong)(dong)(dong) 機(ji)提(ti)供(gong)的 扭矩分送(song)(song)到(dao)前輪(lun)(lun)和(he)后輪(lun)(lun)，不需要手(shou)動(dong)(dong)(dong)去調整，也沒有(you)低(di)檔(dang)(dang)選(xuan)擇。全(quan)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong) 減低(di)了(le)車輪(lun)(lun)打滑的程度，改善了(le)駕(jia)(jia)駛(shi)者(zhe)的控車能力。全(quan)輪(lun)(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)通(tong)(tong)常是一種 正(zheng)常路面駕(jia)(jia)駛(shi)系統，并不設計用于(yu)越(yue)野駕(jia)(jia)駛(shi)。

汽(qi)車(che)(che)在(zai)行(xing)駛時，電(dian)腦利用下述3種傳(chuan)感(gan)器(qi)不(bu)斷檢測汽(qi)車(che)(che)的(de)(de)行(xing)駛狀態，即4個車(che)(che)輪(lun)的(de)(de)轉(zhuan)速傳(chuan)感(gan)器(qi)、汽(qi)車(che)(che)的(de)(de)前(qian)后左右(you)加(jia)速度(du)(du)傳(chuan)感(gan)器(qi)、發動(dong)(dong)機轉(zhuan)速傳(chuan)感(gan)器(qi)。此外，利用轉(zhuan)向(xiang)(xiang)盤轉(zhuan)向(xiang)(xiang)角(jiao)傳(chuan)感(gan)器(qi)、油門(men)踏板開度(du)(du)傳(chuan)感(gan)器(qi)不(bu)斷地判斷司機的(de)(de)駕駛意圖(tu)，按(an)預先給定的(de)(de)程序進行(xing)綜(zong)合控(kong)制。在(zai)AWD系(xi)(xi)統(tong)中，向(xiang)(xiang)前(qian)后車(che)(che)輪(lun)的(de)(de)動(dong)(dong)力(li)分(fen)配(pei)影響到(dao)汽(qi)車(che)(che)的(de)(de)行(xing)駛性(xing)(xing)能(neng)。如當汽(qi)車(che)(che)向(xiang)(xiang)前(qian)后輪(lun)驅動(dong)(dong)力(li)的(de)(de)分(fen)配(pei)比為0:100時，具有(you)較高的(de)(de)轉(zhuan)向(xiang)(xiang)性(xing)(xing)能(neng)和極限(xian)行(xing)駛性(xing)(xing)能(neng)，當驅動(dong)(dong)力(li)分(fen)配(pei)比為50:50時，穩(wen)定性(xing)(xing)得(de)到(dao)提高，但(dan)轉(zhuan)向(xiang)(xiang)性(xing)(xing)能(neng)和 極限(xian)行(xing)駛性(xing)(xing)能(neng)會下降(jiang)。在(zai)轉(zhuan)向(xiang)(xiang)性(xing)(xing)能(neng)、穩(wen)定性(xing)(xing)和極限(xian)行(xing)駛性(xing)(xing)能(neng)之間要獲得(de)良好平衡，必須確定優的(de)(de)前(qian)后驅動(dong)(dong)力(li)分(fen)配(pei)系(xi)(xi)數，理想(xiang)的(de)(de)分(fen)配(pei)系(xi)(xi)數按(an)照不(bu)同的(de)(de)路(lu)面有(you)所不(bu)同，在(zai)允許(xu)強力(li)加(jia)速的(de)(de)鋪裝路(lu)面上(shang)考慮(lv)到(dao)載(zai)荷轉(zhuan)移，以向(xiang)(xiang)后輪(lun)分(fen)配(pei)較大(da)驅動(dong)(dong)力(li)為宜。但(dan)是，在(zai)打滑的(de)(de)路(lu)面，當向(xiang)(xiang)后輪(lun)分(fen)配(pei)較大(da)驅動(dong)(dong)力(li)時，就會引起(qi)過(guo)度(du)(du)轉(zhuan)向(xiang)(xiang)。有(you)資料(liao)認(ren)為，理想(xiang)的(de)(de)前(qian)后驅動(dong)(dong)力(li)分(fen)配(pei)比在(zai)3O ：70～50：50。目前(qian)，本田新一(yi)代Legend轎車(che)(che)的(de)(de)SH—AWD能(neng)使前(qian)后驅動(dong)(dong)力(li)分(fen)配(pei)在(zai)70：30—30：70內連續變化。

輪(lun)(lun)體、支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)軸(zhou)、軸(zhou)套、密封圈、端(duan)蓋(gai)等相關部件構成。支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)可分(fen)為單邊支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)與雙邊支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)；挖掘機(ji)用支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)與推土機(ji)用支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)，挖掘機(ji)用支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)一(yi)般(ban)是黑(hei)色(se)油漆，推土機(ji)支(zhi)(zhi)(zhi)(zhi)重(zhong)(zhong)輪(lun)(lun)一(yi)般(ban)是黃色(se)油漆

支(zhi)重輪(lun)(lun)輪(lun)(lun)體(ti)材料(liao)一(yi)般50Mn、40Mn2、等材料(liao)，主要工(gong)藝(yi)鑄(zhu)造或鍛造，機(ji)(ji)械加(jia)工(gong)，然后(hou)進行(xing)熱(re)處(chu)理(li)，輪(lun)(lun)子(zi)表(biao)面淬(cui)火后(hou)的硬度要達到(dao)HRC45~52，以增加(jia)輪(lun)(lun)子(zi)表(biao)面的耐(nai)磨性。支(zhi)重輪(lun)(lun)軸的加(jia)工(gong)精度要求比較高，一(yi)般是需要數控(kong)機(ji)(ji)床進行(xing)加(jia)工(gong)才能達到(dao)要求。材料(liao)以40Mn2較多，加(jia)工(gong)后(hou)也要進行(xing)淬(cui)火熱(re)處(chu)理(li)，硬度達到(dao)HRC42左右