汽油机燃油修正及诊断的失效模式探讨

Discussion on Fuel Correction for a Gasoline Engine and Diagnostic Failure

分析了汽油机排放闭环控制的基本原理,以及根据氧传感器电压信号进行的燃油修正的基本原理,阐明了短期燃油修正和长期燃油修正之间的关系,以及燃油修正诊断的基本逻辑。并针对燃油修正诊断故障进行了举例说明,对于燃油修正诊断的故障排查进行了一定的探讨。

This paper analyzes the basic principle of the closed loop control for the gasoline engine and the fuel correction according to voltage signal of the O2 sensor, describes clearly the relationship between the long term fuel correction and the short term fuel correction and explains the basic logic of fuel correction diagnostic and illustrates the diagnostic faults of fuel correction through samples and gives some discusses on the inspection to the problems.