Control apparatus for internal combustion engine and control apparatus for vehicle equipped with internal combustion engine

摘要

Provided is a control apparatus for an internal combustion engine that can suppress blowback of in-cylinder residual gas to an intake passage when reverting from a fuel-cut operation accompanied by valve stopping control of an intake valve while suppressing an oil ascent during execution of the fuel-cut operation, and a control apparatus for a vehicle equipped with the internal combustion engine. When executing a fuel-cut operation accompanied by intake valve stopping control, advancement control of the opening/closing timing of an exhaust valve (32) is executed. If the advancement control is being executed in a case where a request to revert from the fuel-cut operation has been detected, an advance amount of the opening/closing timing of the exhaust valve (32) is retarded so as to become less than or equal to a predetermined value.

主权项

1. A control apparatus for an internal combustion engine, comprising:
an intake valve stop mechanism that is capable of changing an operating state of an intake valve between a valve working state and a closed-valve stopped state; an exhaust variable valve operating apparatus that is capable of changing a valve opening characteristic of an exhaust valve toward a target value with a response delay; and a controller that is programmed to: execute a fuel-cut operation when a predetermined execution condition is established during operation of the internal combustion engine; execute, at a time of execution of the fuel-cut operation, intake valve stopping control that changes the operating state of the intake valve from the valve working state to the closed-valve stopped state; execute a valve-stopped-time exhaust valve control that, at a time of execution of the intake valve stopping control, changes the valve opening characteristic of the exhaust valve so that an in-cylinder residual gas amount of gas that remains inside a cylinder when the exhaust valve is closed increases; detect a request to revert from the fuel-cut operation; execute a valve-reversion-time exhaust valve control that, when performing the valve-stopped-time exhaust valve control in a case where a request to revert from the fuel-cut operation accompanied by the intake valve stopping control has been detected, changes the valve opening characteristic of the exhaust valve so that the in-cylinder residual gas amount decreases; determine, at a time of execution of the valve-reversion-time exhaust valve control, whether or not the valve opening characteristic of the exhaust valve has been controlled until the valve opening characteristic becomes a control amount that makes the in-cylinder residual gas amount less than or equal to a predetermined value; and prohibit, in a case where a request to revert from the fuel-cut operation accompanied by the intake valve stopping control has been detected, a change of the operating state of the intake valve from the closed-valve stopped state to the valve working state until it is determined that the valve opening characteristic of the exhaust valve has been controlled until the valve opening characteristic becomes the control amount.