(1)起(qi)動發動機,使其達到(dao)正常工作溫度;
(2)然后(hou)將變速(su)桿(gan)置(zhi)于空檔(dang),并使發動機空轉。
(3)找到節氣門后面專門設置的進氣系統的真空檢測孔,并在那里連接真空計(如果沒有這樣的檢測孔,則可以拆卸進氣歧管上的真空管并使用三通 連接真空計),即可執行測試。
進氣管真空異常對自動控制系統的影響
由于進氣管的(de)真(zhen)(zhen)空(kong)度(du)(du)(du)意(yi)味著發動(dong)機轉(zhuan)速和(he)負荷(he)的(de)大(da)小,因(yin)此(ci)進氣管的(de)真(zhen)(zhen)空(kong)度(du)(du)(du)變(bian)化意(yi)味著發動(dong)機的(de)速度(du)(du)(du)和(he)負荷(he)發生了變(bian)化,因(yin)此(ci)在(zai)電(dian)子控(kong)制汽(qi)車(che)中,負壓(ya)是 發動(dong)機進氣管用(yong)(yong)作動(dong)力(li)(li)源,廣泛用(yong)(yong)于電(dian)子控(kong)制系(xi)(xi)統(tong)(tong)的(de)執行(xing)器(qi)及其他(ta)裝(zhuang)置,例如(ru)進氣歧管的(de)膜片(pian)對壓(ya)力(li)(li)傳感器(qi),燃油(you)壓(ya)力(li)(li)調節器(qi),曲軸箱強制通風系(xi)(xi)統(tong)(tong),燃油(you)蒸氣回收系(xi)(xi)統(tong)(tong),廢氣再循環系(xi)(xi)統(tong)(tong) ,巡航控(kong)制系(xi)(xi)統(tong)(tong)真(zhen)(zhen)空(kong)致動(dong)器(qi)和(he)真(zhen)(zhen)空(kong)助力(li)(li)器(qi),用(yong)(yong)于制動(dong)系(xi)(xi)統(tong)(tong)。 如(ru)果(guo)進氣管的(de)真(zhen)(zhen)空(kong)異(yi)常(chang)(chang),將嚴重影(ying)響上(shang)述系(xi)(xi)統(tong)(tong)的(de)正常(chang)(chang)運行(xing)。