Patent ID: 8005607
Filing Date: 2011-08-23
Classification: F02D,F02P,G01L,Y02T

Abstract:
1. A device for controlling ignition timing of an internal combustion engine, comprising: an operation unit, wherein said operation unit detects a set of magnitude values obtained by logarithmically converting magnitudes of vibrations of said internal combustion engine, said operation unit calculates a median value and a standard deviation of said set of magnitude values based on said set of magnitude values, said operation unit calculates a background level that is related to magnitude of vibration of said internal combustion engine by subtracting a product of said standard deviation and a predetermined constant from said median value, said operation unit calculates a knock magnitude related to magnitude of vibration of said internal combustion engine by dividing said magnitude value by said background level, and said operation unit controls ignition timing of said internal combustion engine based on a result of comparison between said knock magnitude and a predetermined value.