国产汽油机的比油耗普遍较高的原因是在化油器设计、制造、调试和使用中混合气变浓使进缸混合气的空燃比变小，造成燃烧不完全． 试验研究表明采用二次补偿空气， 可有效提高进缸混合气的空燃比， 从而改善国产车用汽油机的性能 Domestic gasoline engine fuel consumption is generally higher than the reason is that in the carburetor design, manufacture, commissioning and use of rich air-fuel mixture into the cylinder becomes smaller, resulting in incomplete combustion. Experimental studies show that the use of secondary air compensation, can effectively increase the air-fuel ratio into the cylinder to improve the performance of domestic gasoline engine