(1)起動發動機,使其達到正(zheng)常(chang)工作溫度;
(2)然后將變速桿(gan)置于空檔(dang),并(bing)使(shi)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(yu)(yu)進(jin)(jin)(jin)氣管的真空度(du)意味著(zhu)發(fa)動(dong)(dong)機轉速和(he)負(fu)(fu)荷的大小,因此進(jin)(jin)(jin)氣管的真空度(du)變化意味著(zhu)發(fa)動(dong)(dong)機的速度(du)和(he)負(fu)(fu)荷發(fa)生(sheng)了變化,因此在電子控(kong)制汽車中,負(fu)(fu)壓(ya)是 發(fa)動(dong)(dong)機進(jin)(jin)(jin)氣管用(yong)作動(dong)(dong)力源,廣(guang)泛用(yong)于(yu)(yu)電子控(kong)制系(xi)統(tong)(tong)(tong)的執行器(qi)及其他裝(zhuang)置(zhi),例如進(jin)(jin)(jin)氣歧(qi)管的膜片對壓(ya)力傳感器(qi),燃(ran)油壓(ya)力調節器(qi),曲軸箱(xiang)強制通(tong)風系(xi)統(tong)(tong)(tong),燃(ran)油蒸氣回收系(xi)統(tong)(tong)(tong),廢氣再循環系(xi)統(tong)(tong)(tong) ,巡航控(kong)制系(xi)統(tong)(tong)(tong)真空致動(dong)(dong)器(qi)和(he)真空助力器(qi),用(yong)于(yu)(yu)制動(dong)(dong)系(xi)統(tong)(tong)(tong)。 如果進(jin)(jin)(jin)氣管的真空異常,將嚴重影響上述系(xi)統(tong)(tong)(tong)的正常運行。