Knock level control apparatus for an internal combustion engine

摘要

A knock level control apparatus for an internal combustion engine, which comprises knock voltage generating means for generating a knock voltage representing a maximum level of frequency components of knock sounds emitted from the internal combustion engine, knock level discriminating means for producing a control signal by comparing the knock voltage with a function voltage, and ignition timing control means for controlling the ignition timing of the internal combustion engine in accordance with the control voltage.