Patent ID: 6374787
Filing Date: 2002-04-23
Classification: F01L

Abstract:
An internal combustion engine comprising;a 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 substantially circumferentially evenly spaced plurality of driven vanes radially disposed in said hub and alternating with said plurality of driving vanes and cooperating with said external surface of said housing; a substantially circumferentially evenly spaced 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 substantially circumferentially equal 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; and means for controlling oscillation of said housing relative to said hub.