Patent ID: 8001832
Filing Date: 2011-08-23
Classification: B60K,B60L,B60W,F02D,G01M,Y02T

Abstract:
1. A misfire determination device for an internal combustion engine that determines a misfire of a multicylinder internal combustion engine in which an output shaft is connected to a post-stage shaft in a post-stage via a torsion element, said misfire determination device comprising: an output shaft rotation speed detection module that detects an output shaft rotation speed that is a rotation speed of said output shaft; a post-stage shaft rotation speed detection module that detects a post-stage shaft rotation speed that is a rotation speed of said post-stage shaft; a resonance influence component calculation module that calculates a resonance influence component as an influence of resonance caused by torsion of said torsion element on the rotation speed of said output shaft on the basis of said detected output shaft rotation speed and said detected post-stage shaft rotation speed; and a misfire determination module that determines a misfire of said internal combustion engine on the basis of a detection rotation speed obtained by subtracting said calculated resonance influence component from said detected output shaft rotation speed.