1results about How to "Control duty cycle" patented technology

The application discloses a control method and device of an automobile engine management system and electronic equipment. The automobile engine management system comprises a main control unit, a secondary control unit, a carbon tank, a carbon tank electromagnetic valve, a first cylinder and a second cylinder. The control method comprises the following steps: the main control unit determines that the absolute value of the difference between the air-fuel ratio of the first cylinder and the expected air-fuel ratio is a first difference value; the main control unit determines that the absolute value of the difference between the air-fuel ratio of the second cylinder and the expected air-fuel ratio is a second difference value; and the main control unit controls the duty cycle of the carbon tank electromagnetic valve according to the size relationship between the first difference value and the second difference value, and preferentially meets the demand of the cylinder corresponding to the larger difference value for the fresh air containing gasoline vapor. The technical solution provided by the embodiment of the application solves the problem that the demand of the two cylinders for the fresh air containing gasoline vapor cannot be met by controlling the duty cycle of the carbon tank electromagnetic valve by using one control unit.