Patent ID: 6334414
Filing Date: 2002-01-01
Classification: F01L,Y10T

Abstract:
A valve timing adjusting apparatus for transmitting a driving force from a driving shaft of an internal combustion engine to a driven shaft for opening/closing at least one of a suction valve and an exhaust valve, the apparatus comprising:a driving side rotor that rotates together with the driving shaft; a driven side rotor that rotates together with the driven shaft and that is relatively rotationally driven with respect to the driving side rotor by means of working fluid pressure; an accommodation chamber formed in one of the driving side rotor and the driven side rotor; a vane formed with the other of the driving side rotor and the driven side rotor and accommodated in the accommodation chamber; constraint means provided on the driving side rotor and the driven side rotor, the constraint means having a contact portion and a contact receiving portion for constraining a relative rotation of the driven side rotor with respect to the driving side rotor by being in contact each other when the driven side rotor is positioned at an intermediate position with respect to the driving side rotor between both ends in a circumferential direction in a predetermined angular range, and the constraint means having contact urging means for urging the contact portion in a direction to be brought into contact with the contact receiving portion, wherein the contact portion receives a force in a direction to release a constraint with the contact receiving portion against an urging force of the contact urging means by means of a first working fluid pressure that drives the driven side rotor toward one of an advance side and a retard side with respect to the driving side rotor, and receives a force in a direction to be brought into contact with the contact receiving portion by means of a second working fluid pressure that drives the driven side rotor in a direction of the other of the advance side and the retard side with respect to the driving side rotor.