| 摘要 |
PURPOSE:To restrict knocking beforehand by a method wherein the ignition timing is delayed beforehand upon a sudden acceleration or the like, in which the generation of the knocking is expected, so as not to generate the knocking. CONSTITUTION:In case the changing rate of the opening of a throttle has become large due to the sudden acceleration of the engine, a voltage being generated at a movable terminal 75 for a throttle detector 7 is increased suddenly, therefore, an output voltage (g-D), exceeding the referential voltage level (g-C) is generated in a differential circuit and a comparator 74 becomes H level. M/M 81 is triggered by the leading edge of a pulse outputted from the comparator 75 and outputs the pulse of period T1 for a given period of time. The pulse of the period T1 is inputted into an integrating circuit 5 through a gate 83 and an angle delaying voltage is generated to delay the ignition timing. In case a manihold pressure is suddenly changed also, a manihold pressure detector 6 catches the changing rate thereof in the same manner as the circuit operation of the throttle detector 7 and the angle delaying voltage is generated in the integrator 5. |
