Patent number: 6814038
Spool valve controlled VCT locking pin release mechanism
Original Assignee: BorgWarner Inc.
Field of technology: Vehicles, Engines and Transportation
Patent granted on: Tue, 09 Nov 2004
Abstract
A variable cam timing system that utilizes the same spool that controls the VCT mechanism to actively control the locking pin. The positions of the spool's multiple lands directly influences whether source oil is supplied to both the locking pin and either the retard or advance chamber of the phaser.