| 摘要 |
PURPOSE:To perform the air/fuel ratio control and the high degree compensation simultaneously through single solenoid valve by providing an adder circuit for lapping the output voltage from a detector over the output voltage from a circuit for integrating the output voltage of an exhaust gas sensor. CONSTITUTION:A solenoid valve 24 is arranged in an air-bleed path 23 and connected to an electronic control unit 30. Said unit 30 is comprised of a comparator 33 connected to an exhaust gas sensor 32 arranged in an exhaust path 31, an integrator 34 connected to the output terminal of the comparator 33, an adder 36 having one input connected to the output of the integrator 34 and the other input connected to the output of an atmospheric pressure detector 35, and an output circuit 37 connected to the output terminal of the adder 36. The output terminal of the output circuit 37 is connected to the solenoid of said valve 24. Consequently, the opening area of the solenoid valve 24 is varied in proportion to the output voltage of the adder 26 to achieve the purpose. |
