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. 10, 2009
Filed:
Sep. 13, 2006
Max Brian Raymond, Peterborough, GB;
Michael Robert Stott, Market Deeping, GB;
Nicholas John Richards, Peterborough, GB;
Andrew Oliver, Peterborough, GB;
Wei Cai, Cambridge, GB;
Max Brian Raymond, Peterborough, GB;
Michael Robert Stott, Market Deeping, GB;
Nicholas John Richards, Peterborough, GB;
Andrew Oliver, Peterborough, GB;
Wei Cai, Cambridge, GB;
Perkins Engines Company Limited, Peterborough, GB;
Abstract
A method of operating an engine is provided. The engine may include a housing having a combustion chamber, a piston disposed adjacent the combustion chamber, a crankshaft connected to the piston, an intake valve associated with the combustion chamber, and an exhaust valve associated with the combustion chamber. The method may also include opening the intake valve after a power stroke of the piston begins and closing the intake valve before the exhaust stroke ends. Furthermore, the method may include causing the exhaust valve to be open for part of an intake stroke of the piston and closing the exhaust valve at least about 30 degrees of crankshaft rotation after the intake stroke begins.