JP2002161767A5 - - Google Patents

Description

[0006]
[Means for Solving the Problems]
Therefore, in the first aspect of the invention, the rotational phase of the cam shaft relative to the crankshaft is advanced by the braking force of the electromagnetic brake, and the elastic body which biases the rotational phase in the retard direction; In the electromagnetic variable valve timing device including the stopper for restricting the change of the rotational phase in the angular direction, the gain in feedback control of the rotational phase is changed according to the target value or the actual value of the rotational phase.

[0008]
According to this configuration, the target value is set smaller by setting the gain when the advance value of the rotation phase target value or the actual rotation phase is a region where the advance angle amount including the reference position restricted by the stopper is small. Slow down the response speed when changing towards.
In the invention according to claim 3, the rotational phase of the camshaft relative to the crankshaft is advanced by the braking force of the electromagnetic brake, the elastic body biasing the rotational phase in the retardation direction, and the retardation In the electromagnetic variable valve timing device provided with a stopper for restricting the change in rotational phase in the direction, the gain in feedback control of the rotational phase according to the target value or the actual value of the rotational phase and the change direction of the advance amount It was set as the structure to change.

Claims (6)

An elastic body for advancing the rotational phase of the camshaft relative to the crankshaft by the braking force of the electromagnetic brake, wherein the elastic body biases the rotational phase in the retard direction, and the change in the rotational phase in the retard direction. In an electromagnetic variable valve timing device provided with a restricting stopper,
A control device of an electromagnetic variable valve timing device, wherein a gain in feedback control of rotational phase is changed according to a target value or an actual value of the rotational phase. The control device of the electromagnetic variable valve timing device according to claim 1, wherein the gain is changed to be small when the advance value of the target value or the actual value of the rotational phase is equal to or less than a predetermined value. An elastic body for advancing the rotational phase of the camshaft relative to the crankshaft by the braking force of the electromagnetic brake, wherein the elastic body biases the rotational phase in the retard direction, and the change in the rotational phase in the retard direction. In an electromagnetic variable valve timing device provided with a restricting stopper,
A control device of an electromagnetic variable valve timing device, wherein a gain in feedback control of a rotational phase is changed according to a target value or an actual value of the rotational phase and a change direction of an advance amount. 4. The electromagnetic type according to claim 3, wherein the gain is changed small when the advance amount of the target value or the actual value of the rotational phase is equal to or less than a predetermined value and at the time of the decrease operation of the advance amount. Control device of variable valve timing device. The electromagnetic variable valve according to any one of claims 1 to 4, wherein the gain in the feedback control is a gain for each control operation based on a deviation between a target value of the rotational phase and an actual value. Control device for timing device. The control device of the electromagnetic variable valve timing device according to any one of claims 1 to 4, wherein the gain in the feedback control is an output gain of a feedback operation amount.