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原廠O2要價不斐,直接改裝電腦將O2功能關閉不就能省下這個費用?


O2的功能對於車輛的「噴油量」是相當重要的關鍵,先從電腦上與轉速來說,一般車輛在怠速時電腦會透過O2回饋的訊號,使得每一毫秒「空燃比」都在變化,而到達某一轉速區域後,空燃比就會朝向最佳空燃比去接近,這個流程就是原廠車賦予O2的一個重要功能,因此O2的檢測可透過回饋電壓來判定,如果回饋電壓變慢那就表示O2功能下降,直接影響噴油的精準性造成不必要的油料浪費,也因此正廠品的價格都不便宜,O2建議的更換時間約是新車出廠5年或是8萬公里以上,O2也會因為排氣溫度的影響生命週期,像是排溫較高的渦輪車則是較容易消耗。

店家建議你的做法在賽車上相當常見,但如果關掉低速O2修正功能,僅提供最佳空燃比讓電腦不斷去接近,那你在市區的油耗就會相當可怕,並且天氣或是海拔高度的改變,都會讓引擎反應大打折扣,筆者是相當不建議這樣做。

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