Patent ID: 6199535
Filing Date: 2001-03-13
Classification: F02D

Abstract:
A throttle control apparatus for an internal combustion engine comprising:an accelerator position sensor for detecting an accelerator position according to a depression position of an accelerator pedal;a throttle angle sensor for detecting an actual opening of a throttle valve as an actual throttle angle;control variable calculation means for calculating a control variable for making the actual throttle angle detected by the throttle angle sensor match a target throttle angle on the basis of a deviation between the actual throttle angle and the target throttle angle which is a target opening of the throttle valve set in accordance with the accelerator position detected by the accelerator position sensor;throttle control means for controlling the actual throttle angle by driving an actuator in accordance with the control variable calculated by the control variable calculation means;failure detection means for detecting a failure in a throttle control;fail-safe means for restraining an upper limit of the target throttle angle to be smaller than a predetermined value in the event of at least a failure detected in the throttle control apparatus; andrestoration control means for restoring the target throttle angle restrained by the fail-safe means to a value used in a normal time when the throttle control means is restored to a normal state.