In order to improve power performance, save energy, and reduce exhaust emission of the coal bed methane engine, the accuracy of air-fuel ratio must be improved.
为了改善煤层气发动机的动力性、经济性和排放性，必须提高发动机空燃比的控制精度。
In order to improve power performance, save energy, and reduce exhaust emission of the coal bed methane engine, the accuracy of air-fuel ratio must be improved.
为了改善煤层气发动机的动力性、经济性和排放性，必须提高发动机空燃比的控制精度。
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