進(jin)氣(qi)溫(wen)(wen)度(du)(du)傳感(gan)器(qi)是一個負溫(wen)(wen)度(du)(du)系(xi)數熱(re)敏(min)電(dian)(dian)阻(zu)(zu),當(dang)溫(wen)(wen)度(du)(du)升高時(shi)(shi),電(dian)(dian)阻(zu)(zu)阻(zu)(zu)值(zhi)減小,當(dang)溫(wen)(wen)度(du)(du)降低時(shi)(shi),電(dian)(dian)阻(zu)(zu)阻(zu)(zu)值(zhi)增大,隨著電(dian)(dian)路中電(dian)(dian)阻(zu)(zu)的變化,導致電(dian)(dian)壓的變化,從而產生不同的電(dian)(dian)壓信(xin)號(hao),完(wan)成控制系(xi)統(tong)的自動操(cao)作。在冷(leng)車時(shi)(shi),進(jin)氣(qi)溫(wen)(wen)度(du)(du)傳感(gan)器(qi)的信(xin)號(hao)與發動機(ji)水(shui)溫(wen)(wen)傳感(gan)器(qi)信(xin)號(hao)基本相同,在熱(re)車時(shi)(shi),其信(xin)號(hao)電(dian)(dian)壓大約是水(shui)溫(wen)(wen)傳感(gan)器(qi)的2~3倍(bei)。
進(jin)氣(qi)溫(wen)(wen)度傳(chuan)(chuan)感器(qi)的作(zuo)用是檢測(ce)發動機的進(jin)氣(qi)溫(wen)(wen)度,送給ECU作(zuo)為修正噴油量(liang)的參考。該傳(chuan)(chuan)感器(qi)在(zai)電(dian)控燃油噴射系統(tong)中測(ce)量(liang)進(jin)氣(qi)溫(wen)(wen)度,并輸入到ECU,用以修正體積(ji)型空氣(qi)流量(liang)傳(chuan)(chuan)感器(qi)由(you)于大氣(qi)溫(wen)(wen)度變化帶來的進(jin)氣(qi)質量(liang)檢測(ce)的誤差。
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