Control method of internal combustion engine

Abstract

The invention provides a control method of an internal combustion engine. In an internal combustion engine equipped with a cylinder deactivation mechanism and a valve operating phase variable mechanism that changes the operating phase of the intake valve and / or exhaust valve, the transition control when shifting from full cylinder operation to partial cylinder operation can be properly performed, preventing execution Noise generation when switching from full cylinder operation to partial cylinder operation. In the case where switching from the full-cylinder operation to the partial-cylinder operation has been requested, preparatory control for suppressing fluctuations in the output torque of the internal combustion engine when the switching operation from the full-cylinder operation to the partial-cylinder operation is performed is executed. After the control is completed, the target switching timing for executing the switching action is calculated according to the operating phase of the valve, and the cylinder deactivation mechanism is controlled so that the switching action is performed at the target switching timing. The target switching timing is set to a timing at which noise is not generated according to the valve operating phase.

Description

technical field [0001] The present invention relates to a control method of an internal combustion engine provided with a plurality of cylinders, and particularly to a control method of an internal combustion engine provided with a cylinder deactivation mechanism and a valve operating phase variable mechanism, wherein the cylinder deactivation mechanism performs the operation of disabling one of the plurality of cylinders. The valve operation phase variable mechanism changes the operation phase of the intake valve and / or exhaust valve provided in each cylinder for switching between partial cylinder operation in which some cylinders are operated and all cylinder operation in which all cylinders are operated. Background technique [0002] Patent Document 1 discloses a control device for an internal combustion engine including a variable valve operating phase mechanism for changing the operating phases of the above-mentioned cylinder deactivation mechanism and intake valves. Ac...

AI Technical Summary

Problems solved by technology

The control device of Patent Document 1 is a device characterized in the method of controlling the operating phase of the intake valve after switching from all-cylinder operation to partial-cylinder operation, and does not take into account the suppression of noise accompanying the switching operation.

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