Patent ID: 6325032
Filing Date: 2001-12-04
Classification: F01L

Abstract:
A valve timing regulation device comprising a first rotating body which rotates freely on a camshaft, said camshaft opening and closing at least one of an intake valve and an exhaust valve of an internal combustion engine, said first rotating body being rotated by an output force of an internal combustion engine, a second rotating body which is stored rotates relative to said first rotating body in a fixed angular range, said second rotating body being engaged to said camshaft, and a locking means which is operated by a mechanical biasing force, which locks said relative rotation of said first and second rotating bodies and which releases said locking on being operated by a hydraulic control pressure, wherein said valve timing regulation device is further characterized in that said second rotating body is formed from a material having a smaller linear expansion coefficient than said first rotating body, said locking means is stored on said first rotating body, and is operated in a radial direction about the axial center of said first rotating body and said second rotating body, and an engagement hole is provided on said second rotating body and engages and disengages with said locking means.