| 摘要 |
The timing of spark ignition is set in normal operating conditions at a programed spark advance angle corresponding to the MBT (minimum spark advance for best torque). When knocking of the engine is detected by a vibration sensor, the ignition timing is delayed by a predetermined amount, e.g., 2 DELTA theta , for each engine cycle that knocking is detected in synchronism with the rotation of the engine. When knocking is not detected, the ignition timing is advanced by another predetermined amount, for each engine cycle that knocking is not detected. e.g., DELTA theta . In this method for controlling the spark timing, the amount of retardation, 2 DELTA theta , is selected to be larger than the other amount of advance, DELTA theta .
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