Patent ID: 7412874
Filing Date: 2008-08-19
Classification: G01L

Abstract:
1. A knocking determination device for an internal combustion engine, comprising: a detecting unit provided, at a detection position, that detects vibrations corresponding to one resonance mode selected from the group consisting of a tangential mode and a radial mode as a resonance mode of combustion pressure propagation in a cylinder of said internal combustion engine occurring due to air column resonance in said internal combustion chamber, and configured to detect vibrations derived from combustion of said internal combustion engine including a vibration corresponding to said resonance mode; a filter that extracts a vibration corresponding to said resonance mode occurring due to air column resonance in said internal combustion chamber; and a determining unit configured to determine whether knocking occurred in said internal combustion engine or not, based on said extracted vibration corresponding to said resonance mode.