Patent ID: 6477999
Filing Date: 2002-11-12
Classification: F01L

Abstract:
In an internal combustion engine having a crankshaft that is rotatable about an axis, a combination comprising:a camshaft (126), said camshaft being rotatable about a second axis, said second axis being parallel to the axis, said camshaft being subject to torque reversals during the rotation thereof; a vane (160) having at least one lobe (160a/160b), said vane being attached to said camshaft, being rotatable with said camshaft and being non-oscillatable with respect to said camshaft; a housing (132), said housing being rotatable with said camshaft and being oscillatable with respect to said camshaft, said housing having at least one recess (132a/132b), said at least one recess receiving said at least one lobe, said at least one lobe being oscillatable within said at least one recess; rotary movement transmitting means (138) for transmitting rotary movement from the crankshaft to the said housing; wherein said housing comprises a passage (252) therein, a pin (250) slidably positioned within said passage, said pin having an inner end and an outer end (252a), and means (256) resiliently acting on said inner end of said pin to urge said outer end of said pin outwardly from said passage; said vane having a plate (168) secured thereto, said plate being rotatable with said vane and being non-rotatable with respect thereto, said plate having an inwardly facing pocket (168f), said pocket being aligned with said passage in a predetermined position of said vane with respect to said housing and being adapted to receive said outer end of said pin in said predetermined position of said vane with respect to said housing to prevent oscillation of said housing with respect to said camshaft; said pocket being adapted to receive pressurized hydraulic fluid, from a source (132e) that is not in series with said at least one recess, the hydraulic fluid, when under normal pressurization, overcoming the effect of said means acting resiliently on said inner end of said pin and maintaining said outer end of said pin out of said pocket to permit oscillation of said housing with respect to said camshaft.