Engine and method for operating an engine

Details Engine and method for operating an engine Engine and method for operating an engine

2006-04-28

2008-09-02

Kamen, Noah (Department: 3747)

Internal-combustion engines

Six-cycle

C123S037000

Reexamination Certificate

active

07418928

ABSTRACT:
A method of operating an engine is provided. The engine may have a housing with one or more combustion chambers, including a first combustion chamber. The engine may also have a piston in fluid communication with the first combustion chamber. The method may include combusting fuel in the first combustion chamber, thereby producing combustion gas that expands and drives the piston during a first combustion-gas-expansion stroke of the piston. The method may also include compressing at least part of the combustion gas in the first combustion chamber during a compression stroke of the piston. Additionally, the method may include, between commencement of the first combustion-gas-expansion stroke and completion of the compression stroke, releasing part of the combustion gas from the first combustion chamber. The method may also include, subsequent to completion of the compression stroke, expanding at least part of the combustion gas against the piston during an additional combustion-gas-expansion stroke of the piston.

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“Six-Cycle Oddball Engine,” printed from Internet on Feb. 23, 2006.
PCT International Search Report; File Ref. No.: 05-886; International Application No.: PCT/US2007/006486; Filing Date: Mar. 14, 2007; Priority Date: Apr. 28, 2006; Applicant: Caterpillar Inc.

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