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:
Aug. 30, 2011
Filed:
Jul. 16, 2008
Bryan K. Pryor, Farmington, MI (US);
David R. Staley, Flushing, MI (US);
Karl R. Gilgenbach, Rochester Hills, MI (US);
Bryan K. Pryor, Farmington, MI (US);
David R. Staley, Flushing, MI (US);
Karl R. Gilgenbach, Rochester Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
In an exemplary embodiment, the momentum of oil-containing air rotating with a crankshaft counterweight in an engine crankcase is converted to static pressure by blocking the flow and directing the resulting static pressure through an orifice to a vent chamber wherein the pressure acts against a cam ring of a variable displacement oil pump. The arrangement modifies the action of an oil pressure control by increasing the effective pump outlet pressure as a function of engine speed using relatively low cost modifications of the engine and oil pump. This pressure may also be used in various ways to modify the control functions of other devices.