공회전속도 안정성 향상을 위한 점화시기의 실린더별 적응제어(1)

The angualr velocity of engine at idle has been sampled fifty five times per one revolution and the average angular acceleration has been calculated for each cylinder. Results have showed that the angular velocity is synchronized with each cylinder. Using PID control of the individual cylinder spark timing, the angular acceleration of each cylinder has been maintained at same level, and the 6 - 7Hz vibration source has been removed.