Patent ID: 7542865
Filing Date: 2009-06-02
Classification: F02D,Y02T

Abstract:
1. An abnormality determination device for determining existence or nonexistence of an abnormality in a cylinder pressure sensor that is mounted in a cylinder of an engine for sensing cylinder pressure of the engine, the abnormality determination device comprising: a calculating device that calculates a gain and an offset indicating an output characteristic of the cylinder pressure sensor; a determining device that determines existence or nonexistence of an abnormality in each one of the calculated gain and offset; and a performing device that performs failsafe processing set in modes different from each other between the case of the abnormality in the gain and the case of the abnormality in the offset if the determining device determines that the abnormality exists, wherein the performing device performs at least processing for prohibiting or restricting usage of a sensor value of the cylinder pressure sensor in control as the failsafe processing in the case of the abnormality in the gain, and the performing device performs at least processing for applying predetermined correction to the offset determined to be abnormal as the failsafe processing in the case of the abnormality in the offset.