Knock detector extracts vibration component superimposed on ion current, controls ignition timing based on knock intensity, varies detection threshold depending on ion current information

摘要

The device extracts a vibration component superimposed on an ion current generated by combustion, forming components greater than or equal to a knock detection threshold into a pulse waveform, deriving a knock intensity and controlling the ignition control time based on the knock intensity. The knock detection threshold is altered depending on ion current information