Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 17, 2009
Patent Application Number
11402540
Date Filed
April 12, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
An internal combustion engine having a cylinder block defining a plurality of cylinders at least half of which are selectively deactivatable by a plurality of switching hydraulic lifters. A source of pressurized oil is provided. Additionally, at least one solenoid-actuated hydraulic control valve operates to selectively communicate pressurized oil from the source of pressurized oil to actuate the plurality of switching hydraulic lifters thereby deactivating the selectively deactivatable cylinders. The number of the solenoid-actuated hydraulic control valves is fewer than the number of selectively deactivatable cylinders.
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