Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nate Trask0
Thomas W. Megli0
Date of Patent
August 21, 2007
0Patent Application Number
107345550
Date Filed
December 12, 2003
0Patent Primary Examiner
Patent abstract
A system and method are described for reducing engine vibration during cylinder deactivation in selected operating conditions. The method utilizes open valve deactivation to better match the cylinder pressure of deactivated cylinders to combusting cylinders. This mode is utilized, along with cylinder closed valve cylinder deactivation, to improve overall fuel economy, while at the same time reducing vibration felt by the vehicle driver.
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