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攤鋪機四輪一帶-桂林四輪一帶-中特工程：

適(shi)(shi)時(shi)(shi)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)適(shi)(shi)時(shi)(shi)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)介乎全時(shi)(shi)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)和分時(shi)(shi)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)之間，驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)模(mo)式(shi)(shi)由電(dian)腦(nao)安排(pai)，操(cao)縱非常(chang)(chang)簡單。采(cai)用(yong)這種驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)系統(tong)的(de)車(che)輛時(shi)(shi)根(gen)據電(dian)腦(nao)來(lai)控制并且選擇(ze)適(shi)(shi)合當下情況(kuang)的(de)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)模(mo)式(shi)(shi)。在正常(chang)(chang)的(de)路面上車(che)輛一(yi)般(ban)會采(cai)用(yong)后輪(lun)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)的(de)方式(shi)(shi)，而一(yi)旦遇到(dao)路面不良或(huo)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)輪(lun)打滑的(de)情況(kuang)，電(dian)腦(nao)就會自(zi)動(dong)(dong)(dong)(dong)(dong)檢測并立即將發動(dong)(dong)(dong)(dong)(dong)機(ji)輸出(chu)扭矩(ju)分配給前排(pai)的(de)兩個車(che)輪(lun)，自(zi)然切(qie)換到(dao)四輪(lun)驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)狀態，從而免(mian)除了(le)駕駛(shi)人的(de)判斷和手動(dong)(dong)(dong)(dong)(dong)操(cao)作，應(ying)用(yong)更加(jia)簡單。不過以(yi)目前的(de)效果來(lai)看，電(dian)腦(nao)比(bi)起(qi)人腦(nao)速度還是慢了(le)很多(duo)，也就是說(shuo)住(zhu)往不能及時(shi)(shi)進行驅(qu)(qu)動(dong)(dong)(dong)(dong)(dong)模(mo)式(shi)(shi)的(de)切(qie)換，反應(ying)較慢。比(bi)如(ru)北京現代(dai)生產的(de)途(tu)勝就是采(cai)用(yong)適(shi)(shi)時(shi)(shi)四驅(qu)(qu)設計。

四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)（4 Wheel Drive)主(zhu)變(bian)速(su)器通(tong)(tong)過(guo)一個(ge)輔助變(bian)速(su)器將(jiang)動(dong)(dong)(dong)力傳送(song)到(dao)前(qian)輪(lun)和后(hou)輪(lun). 輔助變(bian)速(su)器通(tong)(tong)常(chang)有(you)三檔選擇； 空(kong)檔，四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)，四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)低(di)檔。空(kong)檔時，四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)就變(bian)成了兩輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)。四(si)輪(lun)驅(qu)(qu)(qu) 動(dong)(dong)(dong)適合于惡劣的路面駕(jia)(jia)駛，例如，雨(yu)雪天和多(duo)沙石路面。四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)低(di)檔則適合高難(nan)度的越野駕(jia)(jia)駛。全(quan)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong) (All Wheel Drive)全(quan)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)是四(si)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)的一種(zhong). 它自(zi)動(dong)(dong)(dong)將(jiang)發動(dong)(dong)(dong) 機(ji)提供的 扭矩分送(song)到(dao)前(qian)輪(lun)和后(hou)輪(lun)，不需要手動(dong)(dong)(dong)去(qu)調整，也沒(mei)有(you)低(di)檔選擇。全(quan)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong) 減低(di)了車輪(lun)打滑(hua)的程度，改善了駕(jia)(jia)駛者的控(kong)車能力。全(quan)輪(lun)驅(qu)(qu)(qu)動(dong)(dong)(dong)通(tong)(tong)常(chang)是一種(zhong) 正(zheng)常(chang)路面駕(jia)(jia)駛系統，并不設計用于越野駕(jia)(jia)駛。

湖北中特工(gong)程機(ji)械有(you)限(xian)公司，成立于(yu)2009年(nian)，位于(yu)湖北咸寧市咸安經濟(ji)開發區(qu)，注冊資金1000萬元，專(zhuan)業技術人員23名，員工(gong)220名，廠區(qu)占(zhan)地70畝。

履帶編輯分類：有整體式和組合式兩種。整體式履帶是履帶板上帶嚙合齒，趨勢與驅動輪嚙合，履帶板本身成為支重輪等輪子的滾動軌道。特點：制造方便，但是磨損快。挖掘機多用組合式特點是，節距小，繞轉性好，挖掘機的行走速度快。使用壽命長。所用材為的履帶板的材料多是重量輕，強度高，結構簡單和價格便宜的軋制板。有單筋，雙筋，三筋等數種。