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:
May. 04, 2010
Filed:
Oct. 18, 2006
James H. Mutti, East Peoria, IL (US);
Kevin L. Dea, Washington, IL (US);
John A. Gadbois, Dunlap, IL (US);
James H. Mutti, East Peoria, IL (US);
Kevin L. Dea, Washington, IL (US);
John A. Gadbois, Dunlap, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method for operating a multi-cylinder internal combustion engine includes varying the opening or closing of engine valves including intake or exhaust valves, in fluid communication with each of the cylinders of the engine. The method further includes generating a signal indicative of engine valve status in response to monitoring an acceleration parameter of the engine. An engine includes a computer configured to determine a performance status of intake or exhaust valves of the engine responsive to monitoring an engine acceleration parameter such as crankshaft acceleration. The computer is configured via fault detection and cylinder trimming routines to adjust valve performance based on a nominal crankshaft acceleration for the engine.