進氣(qi)溫(wen)(wen)度(du)(du)傳感(gan)器(qi)(qi)是一個負溫(wen)(wen)度(du)(du)系(xi)數熱敏(min)電(dian)(dian)阻,當溫(wen)(wen)度(du)(du)升高(gao)時(shi),電(dian)(dian)阻阻值減小,當溫(wen)(wen)度(du)(du)降低時(shi),電(dian)(dian)阻阻值增(zeng)大(da),隨著電(dian)(dian)路中(zhong)電(dian)(dian)阻的(de)(de)變化,導(dao)致電(dian)(dian)壓的(de)(de)變化,從而產生不同的(de)(de)電(dian)(dian)壓信號,完成控(kong)制系(xi)統的(de)(de)自動操作。在冷(leng)車(che)時(shi),進氣(qi)溫(wen)(wen)度(du)(du)傳感(gan)器(qi)(qi)的(de)(de)信號與發(fa)動機水(shui)(shui)溫(wen)(wen)傳感(gan)器(qi)(qi)信號基本相同,在熱車(che)時(shi),其信號電(dian)(dian)壓大(da)約是水(shui)(shui)溫(wen)(wen)傳感(gan)器(qi)(qi)的(de)(de)2~3倍。
進氣(qi)溫(wen)度(du)傳感(gan)器(qi)的作(zuo)用是(shi)檢(jian)測發動機的進氣(qi)溫(wen)度(du),送給(gei)ECU作(zuo)為(wei)修(xiu)(xiu)正(zheng)噴油量(liang)的參考。該傳感(gan)器(qi)在電(dian)控(kong)燃(ran)油噴射系統(tong)中(zhong)測量(liang)進氣(qi)溫(wen)度(du),并輸入到ECU,用以修(xiu)(xiu)正(zheng)體積型空氣(qi)流量(liang)傳感(gan)器(qi)由(you)于大氣(qi)溫(wen)度(du)變(bian)化帶(dai)來(lai)的進氣(qi)質量(liang)檢(jian)測的誤差(cha)。
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