進(jin)(jin)氣溫(wen)(wen)度(du)傳感器(qi)是(shi)一個負溫(wen)(wen)度(du)系數熱(re)敏電(dian)(dian)阻,當溫(wen)(wen)度(du)升高(gao)時(shi)(shi),電(dian)(dian)阻阻值(zhi)減小(xiao),當溫(wen)(wen)度(du)降(jiang)低時(shi)(shi),電(dian)(dian)阻阻值(zhi)增大,隨著電(dian)(dian)路中電(dian)(dian)阻的變化,導(dao)致電(dian)(dian)壓的變化,從而產(chan)生(sheng)不(bu)同(tong)的電(dian)(dian)壓信(xin)(xin)號(hao),完成控制系統的自動操作。在冷車時(shi)(shi),進(jin)(jin)氣溫(wen)(wen)度(du)傳感器(qi)的信(xin)(xin)號(hao)與發動機水(shui)溫(wen)(wen)傳感器(qi)信(xin)(xin)號(hao)基本相同(tong),在熱(re)車時(shi)(shi),其信(xin)(xin)號(hao)電(dian)(dian)壓大約是(shi)水(shui)溫(wen)(wen)傳感器(qi)的2~3倍。
進(jin)氣(qi)(qi)溫度(du)(du)(du)傳感(gan)器(qi)的(de)作用是檢(jian)測(ce)(ce)(ce)發動機的(de)進(jin)氣(qi)(qi)溫度(du)(du)(du),送給ECU作為修(xiu)正噴(pen)油量(liang)的(de)參考。該傳感(gan)器(qi)在(zai)電控燃油噴(pen)射(she)系(xi)統中測(ce)(ce)(ce)量(liang)進(jin)氣(qi)(qi)溫度(du)(du)(du),并(bing)輸(shu)入到ECU,用以修(xiu)正體積型(xing)空氣(qi)(qi)流量(liang)傳感(gan)器(qi)由(you)于大氣(qi)(qi)溫度(du)(du)(du)變化帶來的(de)進(jin)氣(qi)(qi)質量(liang)檢(jian)測(ce)(ce)(ce)的(de)誤差。
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