Spool valve controlled VCT locking pin release mechanism

Patent No. 6,941,913

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

Issued: September 13, 2005
Filed: September 22, 2004

A VCT phaser for an engine having a housing, rotor and a spool valve. The rotor having a bore comprising an open outer end, an inner surface, and inner end having a vent port and arranged along the bore, an advance port, a common port, a retard port, and a lock port. The spool valve comprises a spool with a first land, a first groove, a second land, a second groove, and a third land, with the area between the inner surface of the bore and the first groove defining a first chamber, the area between the bore and the second groove defining a second chamber, and the area between the bore and the inner end of the spool defining a third chamber. A passage between the first groove and the second groove for fluid passage provides fluid communication between the first chamber and the second chamber and lock pin.


This application claims priority from pending utility application Ser. No. 10/603,637 filed Jun. 25, 2003, entitled "SPOOL VALVE CONTROLLED VCT LOCKING PIN RELEASE MECHANISM," which was disclosed in provisional application No. 60/411,921, filed Sep. 19, 2002, entitled "SPOOL VALVE CONTROLLED VCT LOCKING PIN RELEASE MECHANISM." The aforementioned application(s) are hereby incorporated herein by reference.

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