Patent ID: 7363142
Filing Date: 2008-04-22
Classification: F02P,Y02T

Abstract:
1. A device for controlling ignition timing of an internal combustion engine, comprising: a knock sensor detecting for a plurality of times a magnitude of vibration occurring in said internal combustion engine; and an operation unit connected to said knock sensor, wherein said operation unit calculates a knock magnitude related to a magnitude of vibration due to knocking, in accordance with each said 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 predetermined first determination value, said operation unit calculates a median value and a standard deviation of said magnitudes detected by said knock sensor, and said operation unit corrects said first determination value so that degree of ignition timing being retarded becomes greater when a second determination value calculated by adding a product of said standard deviation and a predetermined coefficient to said median value is greater than said first determination value.