維修小知識：如何查找機油消耗過多的原因

如果(guo)發現機油消耗(hao)過多，應從檢查泄(xie)漏的燃燒兩個方(fang)面入手(shou)。

首先(xian)檢(jian)查有無(wu)漏(lou)(lou)油(you)(you)(you)(you)(you)(you)處，對曲軸(zhou)(zhou)前端(duan)(duan)(duan)(duan)和后(hou)端(duan)(duan)(duan)(duan)漏(lou)(lou)油(you)(you)(you)(you)(you)(you)部位及(ji)油(you)(you)(you)(you)(you)(you)底(di)殼和機(ji)油(you)(you)(you)(you)(you)(you)濾清器襯墊(dian)處仔細檢(jian)查，具體作法是(shi)打開(kai)離合器檢(jian)查孔(kong)蓋(gai)，觀察飛輪(lun)下(xia)部有無(wu)機(ji)油(you)(you)(you)(you)(you)(you)，若有機(ji)油(you)(you)(you)(you)(you)(you)，多半是(shi)因為(wei)曲軸(zhou)(zhou)后(hou)端(duan)(duan)(duan)(duan)油(you)(you)(you)(you)(you)(you)封不良引(yin)起曲軸(zhou)(zhou)后(hou)端(duan)(duan)(duan)(duan)漏(lou)(lou)油(you)(you)(you)(you)(you)(you)。拆下(xia)起動爪，查看(kan)曲軸(zhou)(zhou)皮(pi)帶(dai)(dai)前端(duan)(duan)(duan)(duan)孔(kong)內是(shi)否(fou)存有機(ji)油(you)(you)(you)(you)(you)(you)，如存在機(ji)油(you)(you)(you)(you)(you)(you)，說明(ming)曲軸(zhou)(zhou)前端(duan)(duan)(duan)(duan)油(you)(you)(you)(you)(you)(you)封古巴損(sun)老化或曲軸(zhou)(zhou)皮(pi)帶(dai)(dai)輪(lun)與油(you)(you)(you)(you)(you)(you)封接觸表面磨(mo)損(sun)嚴重引(yin)起漏(lou)(lou)油(you)(you)(you)(you)(you)(you)，對此可在起動爪端(duan)(duan)(duan)(duan)加墊(dian)石棉(mian)繩堵塞漏(lou)(lou)油(you)(you)(you)(you)(you)(you)。

如(ru)果(guo)不(bu)是泄(xie)漏引起的(de)耗油(you)(you)(you)(you)過(guo)(guo)多(duo)，那(nei)就應(ying)檢查機(ji)(ji)油(you)(you)(you)(you)是否被吸入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)燃(ran)燒(shao)。具體作法是加(jia)(jia)大油(you)(you)(you)(you)門(men)高(gao)速(su)運(yun)轉，若排(pai)(pai)氣(qi)(qi)管(guan)(guan)(guan)排(pai)(pai)出大量濃藍(lan)煙(yan)霧，同時加(jia)(jia)機(ji)(ji)油(you)(you)(you)(you)口處(chu)大量冒(mao)(mao)煙(yan)或脈動(dong)(dong)冒(mao)(mao)煙(yan)，則說明機(ji)(ji)油(you)(you)(you)(you)進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)。機(ji)(ji)油(you)(you)(you)(you)進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)的(de)原(yuan)(yuan)因，一是曲(qu)(qu)軸(zhou)(zhou)箱內的(de)機(ji)(ji)油(you)(you)(you)(you)沿缸(gang)(gang)套進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)，二(er)是機(ji)(ji)油(you)(you)(you)(you)沿氣(qi)(qi)門(men)室(shi)(shi)(shi)氣(qi)(qi)門(men)導管(guan)(guan)(guan)間隙進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)。如(ru)高(gao)速(su)運(yun)轉，排(pai)(pai)氣(qi)(qi)管(guan)(guan)(guan)冒(mao)(mao)濃藍(lan)煙(yan)，而加(jia)(jia)機(ji)(ji)油(you)(you)(you)(you)口處(chu)不(bu)冒(mao)(mao)煙(yan)，則機(ji)(ji)油(you)(you)(you)(you)多(duo)半是從氣(qi)(qi)缸(gang)(gang)套上部(bu)(bu)進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)，可能(neng)是氣(qi)(qi)門(men)導管(guan)(guan)(guan)斷裂或氣(qi)(qi)門(men)油(you)(you)(you)(you)封失效所(suo)致；如(ru)排(pai)(pai)氣(qi)(qi)管(guan)(guan)(guan)冒(mao)(mao)藍(lan)煙(yan)同時加(jia)(jia)機(ji)(ji)油(you)(you)(you)(you)口處(chu)大量冒(mao)(mao)煙(yan)或脈動(dong)(dong)冒(mao)(mao)煙(yan)，則說明機(ji)(ji)油(you)(you)(you)(you)是從氣(qi)(qi)缸(gang)(gang)下部(bu)(bu)進(jin)(jin)入(ru)(ru)燃(ran)燒(shao)室(shi)(shi)(shi)的(de)，可根據發(fa)動(dong)(dong)機(ji)(ji)的(de)工(gong)作情(qing)況，判(pan)斷出燒(shao)機(ji)(ji)油(you)(you)(you)(you)的(de)具體原(yuan)(yuan)因。如(ru)果(guo)燒(shao)機(ji)(ji)油(you)(you)(you)(you)，但(dan)發(fa)動(dong)(dong)機(ji)(ji)工(gong)作基(ji)本(ben)正常，則可能(neng)是扭曲(qu)(qu)環或錐形環裝配時裝反了。如(ru)燒(shao)機(ji)(ji)油(you)(you)(you)(you)的(de)同時伴有發(fa)動(dong)(dong)機(ji)(ji)動(dong)(dong)力不(bu)足，則多(duo)為活(huo)塞與缸(gang)(gang)壁間隙過(guo)(guo)大，活(huo)塞環磨損(sun)失效或活(huo)塞環抱死及(ji)對口所(suo)引起的(de)。如(ru)果(guo)排(pai)(pai)氣(qi)(qi)管(guan)(guan)(guan)冒(mao)(mao)煙(yan)嚴(yan)重，從油(you)(you)(you)(you)尺管(guan)(guan)(guan)處(chu)竄(cuan)機(ji)(ji)油(you)(you)(you)(you)，則一般是因曲(qu)(qu)軸(zhou)(zhou)箱強制(zhi)通風閥或曲(qu)(qu)軸(zhou)(zhou)箱通風孔堵塞，造成曲(qu)(qu)軸(zhou)(zhou)箱壓(ya)力過(guo)(guo)高(gao)引起。