Patent ID: 6311672
Filing Date: 2001-11-06
Classification: F02D,F02P,G01L,Y02T

Abstract:
A device for controlling the knocking of an internal combustion engine comprising:various sensors for detecting the operation conditions of an internal combustion engine;an ionic current detecting means for detecting the ionic current that flows through a spark plug during the combustion in said internal combustion engine;a knocking level operation means for processing the signals of the knocking level corresponding to the knocking state of said internal combustion engine based on said ionic current;an averaging means for determining an average knocking level by averaging said signals of the knocking level;a background level operation means for establishing a background level based on said average knocking level;a knock judging means for judging the knocking state of said internal combustion engine by comparing said signals of the knocking level with said background level; anda control quantity calculation means for calculating the control quantity of said internal combustion engine based on the operation conditions of said internal combustion engine and the result of judgement by said knock judging means;wherein provision is further made of:a transience judging means for judging said operation conditions that are in a transient state; andan average value correction means for decreasing said average knocking level depending upon a transience judgement signal from said transience judging means.