knocking detection method, ignition period control method, and ignition period control system

摘要: The invention relates to a knocking detection method, an ignition period control and system. method is equipped with: step wherein oscillation waveform caused by combustion in chamber obtained: first time window that precedes of maximum internal pressure, which when the pressure inside at its during single cycle, second located immediately after are set, from waveforma component included each converted frequency range expression; whereina peak value, amplitude expression reaches window, extracted, determination made as whether has occurred,on basis value value.