Method to ensure robust operation of a pin lock in a vane style cam phaser

Patent No. 6,766,777

Issued: July 27, 2004
Filed: May 19, 2003
Based on Provisional Application No. 60/389,067, filed Jun. 14, 2002

Inventor: Simpson, Roger; Gardner, Marty (Ithaca, NY)

Assignee:BorgWarner, Inc. (Auburn Hills, MI)


A variable camshaft timing phaser having a locking pin directly influenced by engine oil, which is not impacted by any intervening valves. The locking pin is comprised of a tapered pin, which fits into a tapered recess. The locking pin is biased towards engaging by a spring, and is retracted by oil from the engine oil supply. The locking pin remains disengaged from the tapered recess as long as the oil pump is on.


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