【摘要】 针对传统化油器式发动机的弊病，提出用电控方式，通过微机对点火定时进行精确控制，并通过步进电机控制的旁通二次空气对发动机的空燃比进行调整，从而实现在不损害发动机原有动力性、经济性的前提下，大幅度地降低排放污染。更多还原

【Abstract】 A method of electronic - controlled system has been put forth to solve the problem of traditional carburetor type engines. The ignition timing is accurately controlled by a singe - chip computer and the A/F raio is adjusted by two by - pass air flow controlled by a step motor, thus greatly decreasing the exhaust emission without deterioration of engine driveability and economy.更多还原