Patent ID: 7011058
Filing Date: 2006-03-14
Classification: F01L

Abstract:
1. A valve timing adjusting device comprising: a first rotor rotatably provided on a camshaft of a system opening and closing at least one intake valve and exhaust valve of an internal combustion engine, and rotatably driven by an output produced by the internal combustion engine, said first rotor having an oil passage which feeds fluid to a lagged side oil pressure chamber; a second rotor fitted in the first rotor relatively rotatably and connected to the camshaft, said second rotor including a plurality of radially extending vanes; and a lock pin which operates by a mechanical urging force to lock a relative rotation between the first rotor and the second rotor at a most advanced position, the lock pin being released by a fluid control pressure, wherein at least one vane of the second rotor at least partially covers the oil passage when the lock pin locks the relative rotation between the first rotor and the second rotor, such that when the lock pin is operated by the fluid control pressure in a lock releasing direction, the second rotor is subsequently rotated away from the most advanced position.