To improve idle rotation stability in a system for controlling controlled variable of an internal combustion engine based on request illustration torque.
Reqeust shaft torque requested by a driver is calculated from accelerator opening operated by the driver by a request shaft torque arithmetic means A at the time of traveling. Loss torque is added to the request shaft torque to determine the request illustration torque. Based on the request illustration torque controlling variable of the internal combustion engine is calculated by a controlling variable arithmetic means D. At the time of idling, the request illustration torque is calculated so that target illustration power calculated by a target illustration power arithmetic means B may be constant. As a result, even when a feedback control of an ISC is not performed at the time of idling, self-restoring force (restoring force for returning idle rotation speed to a target value) for idle rotation fluctuation by indeterminate disturbance load can be secured without depending on a complicated adaptation, and idle rotation stability for disturbance load can be improved.
MATSUMOTO HIRAKI
KATO YOSHIFUMI
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