Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 17, 2011
Patent Application Number
12047536
Date Filed
March 13, 2008
Patent Primary Examiner
Patent abstract
A variable camshaft timing (VCT) system for an internal combustion engine is described. In one example, the system includes a spool valve that displaces oil from one phaser chamber to another phaser chamber when the spool valve is moved. The system may respond faster than systems that employ a pump to move oil between phaser chambers.
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