Combustion engine

Details Combustion engine Combustion engine

2006-12-12

2006-12-12

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

C123S0780BA

Reexamination Certificate

active

07146940

ABSTRACT:
Disclosed is a combustion engine. The engine includes a combustion chamber (40), which is delimited at one end by a head (41) and delimited at a second end by a piston (1). The piston is arranged on a connecting rod (3) via a piston pin (2). A body (1;8;52) with a delimiting surface (8A) is movable in relation to the piston pin (2) and facilitates a variable volume in the combustion chamber (40). A compression spring (10), acts on the surface (8A) with a spring force in the direction of the combustion chamber (40). The engine further includes a pressure chamber (11) that can be supplied with hydraulic oil from a pressure source via a feed duct (12,13), which pressure chamber (11) is able to cause hydraulic movement of the moveable delimiting surface (8A) with the aim of being able to adjust the size of the combustion chamber depending on the combustion pressure. The pressure chamber (11) communicates with an inlet duct (13) that facilitates replenishment of the hydraulic oil from the pressure source to the pressure chamber (11) when the pressure (P2) in the pressure chamber (11) falls below the pressure (P1) in the feed duct (13).

REFERENCES:
patent: 2170266 (1939-08-01), Leissner
patent: 3311096 (1967-03-01), Carney et al.
patent: 3450112 (1969-06-01), Bachle
patent: 3667433 (1972-06-01), Isley
patent: 3704695 (1972-12-01), Cronstedt
patent: 4016841 (1977-04-01), Karaba et al.
patent: 4241705 (1980-12-01), Karaba et al.
patent: 5755192 (1998-05-01), Brevick

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