進(jin)氣(qi)溫(wen)(wen)度傳(chuan)感器(qi)是(shi)一個(ge)負溫(wen)(wen)度系數熱敏電(dian)(dian)阻(zu)(zu),當溫(wen)(wen)度升(sheng)高時,電(dian)(dian)阻(zu)(zu)阻(zu)(zu)值減小,當溫(wen)(wen)度降(jiang)低時,電(dian)(dian)阻(zu)(zu)阻(zu)(zu)值增(zeng)大(da),隨著電(dian)(dian)路中電(dian)(dian)阻(zu)(zu)的變化,導致電(dian)(dian)壓(ya)的變化,從而產生不(bu)同(tong)的電(dian)(dian)壓(ya)信(xin)號(hao),完成(cheng)控制系統的自(zi)動操作。在冷車時,進(jin)氣(qi)溫(wen)(wen)度傳(chuan)感器(qi)的信(xin)號(hao)與發動機水(shui)溫(wen)(wen)傳(chuan)感器(qi)信(xin)號(hao)基(ji)本相同(tong),在熱車時,其信(xin)號(hao)電(dian)(dian)壓(ya)大(da)約是(shi)水(shui)溫(wen)(wen)傳(chuan)感器(qi)的2~3倍。
進(jin)(jin)氣(qi)溫度(du)傳(chuan)感器(qi)的作(zuo)用是檢(jian)測(ce)(ce)(ce)發(fa)動機的進(jin)(jin)氣(qi)溫度(du),送給ECU作(zuo)為修(xiu)正(zheng)噴(pen)油量的參考。該傳(chuan)感器(qi)在電控燃(ran)油噴(pen)射系統(tong)中測(ce)(ce)(ce)量進(jin)(jin)氣(qi)溫度(du),并輸入到ECU,用以修(xiu)正(zheng)體積(ji)型空氣(qi)流量傳(chuan)感器(qi)由于大氣(qi)溫度(du)變化帶(dai)來的進(jin)(jin)氣(qi)質(zhi)量檢(jian)測(ce)(ce)(ce)的誤差(cha)。
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