Patent ID: 7631550
Filing Date: 2009-12-15
Classification: F02D

Abstract:
1. A diagnosis apparatus for intake sensors, comprising: an intake air amount sensor detecting an amount of intake air of an internal combustion engine; an intake pipe pressure sensor detecting an intake pipe pressure; a throttle position sensor detecting a position of a throttle valve; and a diagnosis means for performing a diagnosis of the intake air amount sensor by conducting a comparison between an intake air amount obtained by the intake air amount sensor and an intake air amount obtained based on the position of the throttle valve detected by the throttle position sensor, and/or performing a diagnosis of the intake pipe pressure sensor by conducting a comparison between an intake air amount obtained based on the intake pipe pressure detected by the intake pipe pressure sensor and an intake air amount obtained based on the position of the throttle valve detected by the throttle position sensor, wherein the diagnosis means performs the diagnosis when a comparison result between the intake air amount obtained by the intake air amount sensor and the intake air amount obtained based on the intake pipe pressure detected by the intake pipe pressure sensor satisfies a predetermined condition.