Patent ID: 6247434
Filing Date: 2001-06-19
Classification: F01L

Abstract:
An internal combustion engine comprisinga camshaft;a hub secured to said camshaft for rotation therewith, said hub having an external surface thereon;a housing circumscribing said hub, said housing having an internal surface thereon, said housing being rotatable with said hub and said camshaft and being oscillatable with respect to said hub and said camshaft;a plurality of driving vanes radially disposed in said housing and cooperating with said external surface of said hub;a plurality of driven vanes radially disposed in said hub and alternating with said plurality of driving vanes and cooperating with said internal surface of said housing;said plurality of driving and driven vanes defining a plurality of alternating advance and retard chambers;locking means for preventing relative motion between said housing and said hub in at least one position between a fully advanced position of said hub relative to said housing and a fully retarded position of said hub relative to said housing, said locking means being reactive to engine oil pressure; andmeans for controlling oscillation of said housing relative to said hub.