Knocking detection device for an automotive engine

摘要: There is disclosed an improvement of a knocking detection device for automotive engine mounted on vehicle having knock sensor detecting analog vibration waveforms the engine, and crank position producing signals corresponding to predetermined angle engine. The comprises conversion circuit converting detected by into digital data every sampling period; decision deciding first term no period second possibility in one cycle engine; setting discrimination level based average value from during decided circuit; calculation calculating determination determining occurrence comparing calculated with set circuit, so as determine when larger than level.