The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Apr. 12, 2006
Frederick J. Rozario, Fenton, MI (US);
William C. Albertson, Clinton Township, MI (US);
Frederick J. Rozario, Fenton, MI (US);
William C. Albertson, Clinton Township, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
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.