Inverted poppet valve for internal combustion engine

Details Inverted poppet valve for internal combustion engine Inverted poppet valve for internal combustion engine

2007-02-27

2007-02-27

Solis, Erick (Department: 3747)

Internal-combustion engines

Valve

Reciprocating valve

C029S888400, C251S333000

Reexamination Certificate

active

11213097

ABSTRACT:
A poppet valve for use in an internal combustion engine. The poppet has a partially-inverted perimeter shape which nevertheless substantially maintains the curtain area of the valve. These improved valves pack more efficiently into the combustion chamber roof area than would conventional, circular-perimeter poppet valves. For the same size combustion chamber, significantly greater total curtain area is achieved, improving engine performance. Valve weight is greatly reduced, enabling the use of lighter return springs, camshafts, desmodromic actuators, and so forth.

REFERENCES:
patent: 1418911 (1922-06-01), Garlick
patent: 2988080 (1961-06-01), Radomir
patent: 4309969 (1982-01-01), Matthes
patent: 4790272 (1988-12-01), Woolenweber
patent: 4981118 (1991-01-01), Lefebvre
patent: 5005538 (1991-04-01), Bergeron
patent: 5168843 (1992-12-01), Franks
patent: 5301640 (1994-04-01), Barranco, Jr.
patent: 2005/0098137 (2005-05-01), Tanaka et al.

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