在修车开始时用故障检测仪进行故障诊断已成为很多人的习惯。通过查阅数据流,可方便地读出喷油信号的脉冲宽度(以下简称喷油脉宽)。喷油脉宽是由发动机ECU根据空气流量传感器或进气歧管绝对压力传感器、转速传感器、水温传感器和氧传感器等的信号确定的。氧传感器信号的参与使喷油脉宽不仅反映发动机进气系统和电子控制系统的工作情况,而且还 It has become the habit of many people to diagnose the fault with the fault detector at the beginning of repairing the vehicle. By referring to the data flow, the pulse width of the injection signal can be easily read out (hereinafter referred to as injection pulse width). Fuel injection pulse width is determined by the engine ECU based on the air flow sensor or intake manifold absolute pressure sensor, speed sensor, water temperature sensor and oxygen sensor. Oxygen sensor signal to make injection pulse width not only reflects the engine intake system and electronic control system work, but also