Patent ID: 7653479
Filing Date: 2010-01-26
Classification: F02D

Abstract:
1. A control device of an internal combustion engine, the control device comprising: a microcomputer that controls at least a fuel injection device of the internal combustion engine; and an abnormality monitoring device that monitors an operation state of the microcomputer and that activates a fuel cut failsafe function by outputting a fuel cut failsafe signal to the fuel injection device to compulsorily stop fuel injection of cylinders when the abnormality monitoring device detects an abnormality in the microcomputer, wherein the microcomputer has a fuel cut failsafe function monitoring section that sets a fuel cut failsafe function diagnosis period in a period in which an operation of the internal combustion engine is stopped, that causes the abnormality monitoring device to output the fuel cut failsafe signal to the fuel injection device during the fuel cut failsafe function diagnosis period, and that monitors a signal state of an operation state monitoring port of the fuel injection device at the time, thereby performing abnormality diagnosis of the fuel cut failsafe function.