Patent ID: 9046012
Filing Date: 2015-06-02
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. A variable valve operating apparatus for an internal combustion engine, comprising: a drive camshaft that is rotationally driven by a rotational force of a crankshaft; a driven cam lobe that is concentric with the drive camshaft, and is rotatably supported by the drive camshaft; a guide member that has a raceway surface formed so as to surround the drive camshaft; a link mechanism that is connected to each of the drive camshaft and the driven cam lobe, has a contact member which is in contact with the raceway surface, and changes a rotation angle of the driven cam lobe with respect to the drive camshaft in association with a positional change of the contact member with respect to a center of rotation of the drive camshaft; a contact maintaining device that maintains contact between the contact member that revolves around the drive camshaft and the raceway surface, while the drive camshaft makes one rotation; an actuator that moves the raceway surface in a plane direction orthogonal to an axial line of the drive camshaft; and a controller that is configured to control a control amount of the actuator to change a moving amount of the raceway surface in the plane direction, in accordance with an operation condition of the internal combustion engine, wherein, in a state in which a center of the raceway surface is eccentric from a center of rotation of the drive camshaft, a distance of the contact member with respect to the center of rotation of the drive camshaft is changed while the drive camshaft makes one rotation.