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:
Dec. 31, 1985
Filed:
Feb. 28, 1985
Remi Curtil, Montlignon, FR;
Societe d'Etudes de Machines Thermiques SEMT, Saint Denis, FR;
Abstract
A method of operating a four-stroke cycle Diesel engine supercharged by an exhaust gas-driven turbocompressor with valve timing comprising a partial overlap of the opening periods of the exhaust and intake valves, with early intake closure and partial exhaust closure for the major part of the intake step followed by partial reopening of the exhaust and its final closure near bottom dead center after closure of the intake valve. At low and medium engine powers part of the supercharged intake air is bypassed to an end of an exhaust manifold, thereby increasing the cylinder filling factor and combustion air excess and substantially reducing exhaust valve temperature in the mid-power operating range of the engine.