Patent ID: 8056519
Filing Date: 2011-11-15
Classification: F01L

Abstract:
1. A camshaft phaser for advancing and retarding the timing of valves in an internal combustion engine, said camshaft phaser comprising: a stator having a plurality of lobes; a rotor selectively rotatably disposed within said stator and having a plurality of vanes interspersed with said stator lobes; a locking pin slidably disposed in a first bore of one of said stator and said rotor, said locking pin having a pin locking end, a shoulder end, a pin intermediate section connecting said pin locking end and said shoulder end, and a longitudinal axis; and a seat for selectively receiving said pin locking end of said locking pin to secure said rotor against rotation within said stator, wherein one of said pin locking end of said locking pin and said seat has a non-circular cross section, wherein said pin locking end of said locking pin has a cross section substantially dissimilar to a cross section of said seat, and wherein said pin locking end of said locking pin and said seat form an advance contact zone in the advance direction of rotor rotation and a retard contact zone in the retard direction of rotor rotation.