Patent ID: 8915222
Filing Date: 2014-12-23
Classification: F01L

Abstract:
1. A variable valve timing control apparatus, comprising: a driving side rotation member synchronously rotating with a crankshaft of an internal combustion engine; a driven side rotation member positioned coaxially with a rotational axis of the driving side rotation member and synchronously rotating with a camshaft for opening and closing a valve for the internal combustion engine; at least one plate provided at a position facing at least one of surfaces of the driving side rotation member, the surfaces extending in a radial direction; a plurality of partition portions extending inwardly from an outer peripheral inner portion of the driving side rotation member to form a fluid chamber between the partition portions; a vane portion extending outwardly from an inner peripheral outer portion of the driven side rotation member, the vane portion being fitted to the fluid chamber to relatively rotate the driving side rotation member and the driven side rotation member within a movable range of the vane portion; a retarded angle chamber formed by dividing the fluid chamber by the vane portion and configured to vary a relative rotational phase of the driven side rotation member relative to the driving side rotation member towards a retarded angle side; an advanced angle chamber formed by dividing the fluid chamber by the vane portion and configured to vary the relative rotational phase of the driven side rotation member relative to the driving side rotation member towards an advanced angle side; a restriction mechanism for restricting the relative rotational phase, the restriction mechanism including a restriction member configured to switch a restricted position, which is defined as a position at which a relative rotation between the driving side rotation member and the driven side rotation member is restricted at the relative rotational phase except a most retarded angle phase and a most advanced angle phase, and an unrestricted position at which the restriction is canceled; a fastening member fixing the plate and the partition portion of the driving side rotation member; and a reinforcement member engaged with the partition portion including a contact surface among the partition portions, the contact surface being configured to receive a contact of the vane portion when the relative rotational phase is either at the most retarded angle phase or the most advanced angle phase.