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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.:

US 9745915 B1

PDFFull Text
Date of Patent:
Aug. 29, 2017

Filed:

Feb. 14, 2014

Internal combustion engine

Applicant:

Pinnacle Engines, Inc., San Carlos, CA (US);

Inventor:

James M. Cleeves, Redwood City, CA (US);

Assignee:

PINNACLE ENGINES, INC, San Carlos, CA (US);

Attorney:

Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.

Primary Examiner:

Hung Q Nguyen

Int. Cl.
CPC ...
F01L 5/04 (2006.01); F02F 1/14 (2006.01); F01L 5/06 (2006.01); F01L 7/04 (2006.01); F02B 25/08 (2006.01); F02B 75/28 (2006.01); F02D 13/02 (2006.01); F02D 15/02 (2006.01); F02F 1/18 (2006.01); F01L 7/00 (2006.01); F01L 9/02 (2006.01); F01P 3/02 (2006.01);
U.S. Cl.
CPC ...
F02F 1/14 (2013.01); F01L 5/06 (2013.01); F01L 7/00 (2013.01); F01L 7/04 (2013.01); F02B 25/08 (2013.01); F02B 75/28 (2013.01); F02B 75/282 (2013.01); F02D 13/028 (2013.01); F02D 13/0269 (2013.01); F02D 15/02 (2013.01); F02F 1/186 (2013.01); F01L 9/02 (2013.01); F01L 2820/033 (2013.01); F01P 2003/021 (2013.01); Y02T 10/142 (2013.01);
Abstract

An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engine can thus be run at higher revolutions per minute and produce more power. An internal sleeve valve is provided for space and other considerations. A combustion chamber size-varying mechanism allows for adjustment of the minimum size of an internal volume to increase efficiency at partial-power operation. Variable intake valve operation is used to control engine power.

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