| 摘要 |
PURPOSE:To improve the performance of an engine, by minimizing torque drop caused at the time of deceleration by delaying the ignition timing gradually for a prescribed while from the time when a throttle valve is fully closed to the time when the throttle valve is judged to be fully closed by means of a control circuit. CONSTITUTION:A signal relating to the temperature of intake air, a signal relating to the pressure in an intake pipe, a signal relating to the temperature of cooling water, an engine-speed signal, given respectively from sensors 2, 10, 20, 26, 28, and a throttle signal given from an ''idle'' contact 6 are furnished to a control circuit 30. Further, a fuel injection signal for controlling the ON-OFF period of a fuel injection valve 16 and an ignition signal for controlling the ON- OFF period of an ignitor 32 are produced via a driving circuit. With such an arrangement, the ignitor 32 is turned OFF when the engine speed is higher than a prescribed value by obtaining a delay value from the count that is increased at the intervals of a prescribed period from th time when the ''idle'' switch 6 is turned ON to ignite the ignitor 32 at the angle theta of ignition timing obtained by subtracting said delay value from the basic ignition timing. |
