Concentric piston for variable compression ratio directly...

Details Concentric piston for variable compression ratio directly... Concentric piston for variable compression ratio directly...

2007-09-25

2007-09-25

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

C123S193600, C123S0480AA, C092S084000

Reexamination Certificate

active

11359663

ABSTRACT:
This invention produces a variable compression ratio in internal combustion engines, based on a sliding concentric piston which moves up by an internal spring and down by the different changing pressures over the concentric piston head, within the combustion chamber. This invention changes the compression ratio in an instantaneous and continuous way, depending directly on the pressure of the fuel mixture load in the combustion chamber.

REFERENCES:
patent: 1546243 (1925-07-01), Kimmerling
patent: 2323742 (1943-07-01), Webster
patent: 3704695 (1972-12-01), Cronstedt
patent: 4031868 (1977-06-01), Karaba et al.
patent: 4137873 (1979-02-01), Caswell, Sr.
patent: 4241703 (1980-12-01), Lin-Liaw
patent: 6223703 (2001-05-01), Galvin
patent: 6907849 (2005-06-01), Galvin
patent: 2002/0104492 (2002-08-01), Cowans

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