Multi-mode variable cam timing phaser

Patent No. 9,695,716

Issued: July 4, 2017
Filed: August 31, 2015
Term Extension:  days

Inventors: Smith; Franklin R. (Cortland, NY), Kenyon; Brian T. (Cayuta, NY)
Assignee: BorgWarner Inc. (Auburn Hills, MI)


A variable camshaft timing device can operate using pressure generated by camshaft torque energy to transfer fluid from one working chamber to another work chamber or operate via an external fluid pressure source to fill one working chamber while simultaneously exhausting an opposing working chamber or operate using both modes simultaneously. The mode of the variable camshaft timing device is determined by the position of the control valve. The lock pin is controlled by fluid from one of the working chambers.


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