Patent ID: 7597073

Claim:
A valve timing control apparatus, comprising: a driving side rotational member synchronously rotatable with a crankshaft of an internal combustion engine; a driven side rotational member arranged coaxially with the driving side rotational member and synchronously rotatable with a camshaft that controls an opening and closing timing of valves of the internal combustion engine; a plurality of fluid pressure chambers formed between the driving side rotational member and the driven side rotational member and each including an advanced angle chamber and a retarded angle chamber, the advanced angle chamber displacing a relative rotational phase of the driven side rotational member to the driving side rotational member in an advanced angle direction by a supply of a fluid to the advanced angle chamber, the retarded angle chamber displacing the relative rotational phase of the driven side rotational member to the driving side rotational member in a retarded angle direction by the supply of the fluid to the retarded angle chamber; a plurality of vanes provided at either one of the driving side rotational member and the driven side rotational member and each dividing the fluid pressure chamber into the advanced angle chamber and the retarded angle chamber; an intermediate member of which a portion is provided in at least one of the plurality of the fluid pressure chambers and engageable with the driving side rotational member and the driven side rotational member, the intermediate member dividing said at least one of the plurality of fluid pressure chambers into the advanced angle chamber and the retarded angle chamber; and an engagement member for causing the intermediate member to engage with either one of the driving side rotational member and the driven side rotational member in response to an operating state of the internal combustion engine.