Abstract: A control system for an internal combustion engine, which controls an output torque of the internal combustion engine for driving a vehicle, is provided. An engine rotational speed is detected, and a change amount of the detected engine rotational speed is calculated. The output torque control amount of the engine is corrected so that the rotational speed change amount coincides with the center value of the local minimum value and the local maximum value of the rotational speed change amount. Specifically, a torque correction amount is calculated according to a torque value which is equal to half of a difference between peak vibration torque values corresponding to the local minimum value and the local maximum value of the rotational speed change amount, and an output torque control amount is corrected with the torque correction amount.

Abstract: A control system for an internal combustion engine, which controls an output torque of the internal combustion engine for driving a vehicle, is provided. An engine rotational speed is detected, and a change amount of the detected engine rotational speed is calculated. The output torque control amount of the engine is corrected so that the rotational speed change amount coincides with the center value of the local minimum value and the local maximum value of the rotational speed change amount. Specifically, a torque correction amount is calculated according to a torque value which is equal to half of a difference between peak vibration torque values corresponding to the local minimum value and the local maximum value of the rotational speed change amount, and an output torque control amount is corrected with the torque correction amount.

Abstract: A control apparatus, a control method, and an engine control unit for a variable cylinder internal combustion engine are provided for appropriately performing any of an idling rotational speed control, a deceleration fuel-cut control, and an auxiliary machinery driving control irrespective of whether or not a cylinder pausing mechanism fails. The control apparatus for the variable cylinder internal combustion engine switchably operated in a full cylinder operation mode and a partial cylinder operation mode comprises an ECU. The ECU determines whether or not the cylinder pause mechanism fails, and sets a target idling rotational speed for use in the idling rotational speed control to a normal operation value when the cylinder pausing mechanism is normal and to a faulty operation value higher than the normal operation value when the cylinder pausing mechanism is faulty.

Abstract: A control apparatus, a control method, and an engine control unit for a variable cylinder internal combustion engine are provided for appropriately performing any of an idling rotational speed control, a deceleration fuel-cut control, and an auxiliary machinery driving control irrespective of whether or not a cylinder pausing mechanism fails. The control apparatus for the variable cylinder internal combustion engine switchably operated in a full cylinder operation mode and a partial cylinder operation mode comprises an ECU. The ECU determines whether or not the cylinder pause mechanism fails, and sets a target idling rotational speed for use in the idling rotational speed control to a normal operation value when the cylinder pausing mechanism is normal and to a faulty operation value higher than the normal operation value when the cylinder pausing mechanism is faulty.