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:
Jul. 01, 2003
Filed:
Dec. 06, 2001
Vimesh M. Patel, Novi, MI (US);
William Conrad Albertson, Clinton Township, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An internal combustion engine includes hydraulically-controlled cylinder deactivation and has an engine block with a plurality of cylinders formed therein. At least one-half of the cylinders are deactivatable by collapsible lifters. An individual hydraulic circuit module is positioned adjacent each deactivatable cylinder. Each hydraulic circuit module includes a valve and is configured to receive a supply of oil from the engine block and to selectively provide pressurized oil to the respective collapsible lifters for cylinder deactivation. A solid cover plate is positioned adjacent each cylinder which is not deactivatable.