Patent ID: 8942909
Filing Date: 2015-01-27
Classification: F02D,F02M,Y02T

Abstract:
1. A control apparatus for an internal combustion engine that is provided with an exhaust gas recirculation (EGR) device, which recirculates a portion of exhaust gas of the internal combustion engine as EGR gas to an intake passage of the internal combustion engine, the control apparatus comprising: an intake air quantity information determining arrangement that senses or computes one of an intake air quantity and a torque of the internal combustion engine as intake air quantity information; a normal combustion threshold value computing arrangement that computes a normal combustion threshold value based on an operational state of the internal combustion engine, wherein the normal combustion threshold value is a threshold value of the intake air quantity information required to be achieved to enable normal combustion in the internal combustion engine; and a misfire-avoidance control arrangement that executes a misfire-avoidance control operation, which avoids misfire by controlling a throttle opening degree of a throttle valve such that a value of the intake air quantity information does not decrease below the normal combustion threshold value.