Patent ID: 7392788
Filing Date: 2008-07-01
Classification: F02D,F02P,G01L,Y02T

Abstract:
1. A device for controlling ignition timing of an internal combustion engine, comprising: a knock sensor detecting magnitude of vibration occurring in said internal combustion engine; and an operation unit connected to said knock sensor, wherein said operation unit calculates knock magnitude related to magnitude of vibration due to knocking, based on the magnitude detected by said knock sensor, said operation unit controls ignition timing of said internal combustion engine, based on a result of comparison between said knock magnitude and a determination value, said operation unit corrects said determination value, based on an occurrence frequency of knocking, said operation unit calculates a first value, based on the magnitude detected by said knock sensor, said operation unit calculates a second value, based on the magnitude detected by said knock sensor, and said operation unit sets one of said determination value and a correction amount of said determination value, based on whether or not a difference between said first value and said determination value is greater than a product of said second value and a predetermined coefficient.