| 摘要 |
PURPOSE:To obtain the optimum ignition timing quickly when an engine condition is transferred into a control area by a method wherein a correcting delay angle upon the time of transfer, in which the engine condition transfers into the non- control area of knocking, is memorized and maintained. CONSTITUTION:An electronic control circuit 34 dicides by the ratio of an air volume Q, sensed by an airflow meter 2, and a revolving signal N, detected by a sensor 32, at a predetermined crank angle whether an engine condition is in the knocking control area or not. If the engine codition is in the control area and the generation of knocking is detected by the signal of a knock sensor 18, knocking is controlled by subtracting the sum of the corecting amount of delay angle and the amount of learning delay angle from a basic spark advance. When the engine condition is transferring into the non-control area, the amount of correcting delay angle upon the transfer is memorized and maintained, while the knocking control is effected by utilizing the memorized and maintained amount of correcting delay angle at the initial stage in which the engine condition is transferred into the control area again. Thus, the optimum ignition timing may be obtained and the knocking will never be generated. |
