When close loop control being carried through Air Fuel Ratio of gas engine, it also should be used in the gasoline vapors recovery system, which magnet valves work as intermittent operation, so as to determine the effect of carbon canister clearing airflow on Air Fuel Ratio, and control the quantity of airflow.
对汽油机的空燃比进行闭环控制时,汽油蒸汽回收系统也要使用闭环控制方法,汽油蒸汽回收系统中的电磁阀以间歇方式工作,以便确定碳罐清理气流对空燃比造成的影响,并据此控制碳罐清理时气流量的大小,使得发动机空燃比总是处于可调节的范围以内。