進(jin)氣溫(wen)(wen)度(du)傳感器(qi)(qi)是一個負溫(wen)(wen)度(du)系(xi)數熱敏電(dian)(dian)(dian)(dian)阻,當(dang)溫(wen)(wen)度(du)升(sheng)高(gao)時(shi),電(dian)(dian)(dian)(dian)阻阻值(zhi)減小,當(dang)溫(wen)(wen)度(du)降(jiang)低時(shi),電(dian)(dian)(dian)(dian)阻阻值(zhi)增(zeng)大,隨著電(dian)(dian)(dian)(dian)路(lu)中電(dian)(dian)(dian)(dian)阻的(de)變化,導致(zhi)電(dian)(dian)(dian)(dian)壓(ya)的(de)變化,從而產生(sheng)不同的(de)電(dian)(dian)(dian)(dian)壓(ya)信號(hao),完成控制系(xi)統的(de)自動操(cao)作。在冷(leng)車時(shi),進(jin)氣溫(wen)(wen)度(du)傳感器(qi)(qi)的(de)信號(hao)與發動機水溫(wen)(wen)傳感器(qi)(qi)信號(hao)基本相同,在熱車時(shi),其信號(hao)電(dian)(dian)(dian)(dian)壓(ya)大約是水溫(wen)(wen)傳感器(qi)(qi)的(de)2~3倍(bei)。
進(jin)氣(qi)(qi)溫(wen)度(du)傳感(gan)(gan)器的作用是檢測(ce)發(fa)動機(ji)的進(jin)氣(qi)(qi)溫(wen)度(du),送給ECU作為修正噴(pen)油量(liang)(liang)的參考。該(gai)傳感(gan)(gan)器在電控燃(ran)油噴(pen)射系統中測(ce)量(liang)(liang)進(jin)氣(qi)(qi)溫(wen)度(du),并輸入到ECU,用以修正體積型空氣(qi)(qi)流(liu)量(liang)(liang)傳感(gan)(gan)器由于(yu)大氣(qi)(qi)溫(wen)度(du)變化(hua)帶來的進(jin)氣(qi)(qi)質量(liang)(liang)檢測(ce)的誤差。
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