Engine cylinder head having an improved intake port...

Details Engine cylinder head having an improved intake port... Engine cylinder head having an improved intake port...

2007-02-27

2007-02-27

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

Reexamination Certificate

active

11219462

ABSTRACT:
A cylinder head of an internal combustion engine is provided with an improved intake port configuration, that improves the efficiency of air intake into a combustion chamber. The engine includes an intake valve which covers an opening of a combustion chamber and which has a valve stem supported by a valve guide. The valve guide is fixed to a curved wall of an intake port leading from a hole in the side of the cylinder head to the intake opening of the combustion chamber. An intake port is configured so that the cross-sectional area thereof reduces with an increasing distance from the intake opening of the combustion chamber, and so that the passage cross-sectional area at a distance equal to about 10% of the total length of the intake port from the intake opening of the combustion chamber is 0.8 times the area of opening of the combustion chamber or smaller.

REFERENCES:
patent: 4300494 (1981-11-01), Graiff et al.
patent: 4508066 (1985-04-01), Hartsock
patent: 4543925 (1985-10-01), Ruf
patent: 5138989 (1992-08-01), Fraidl et al.
patent: 5671709 (1997-09-01), Sokoloski
patent: 6390051 (2002-05-01), Hilpert et al.
patent: 2003/0177997 (2003-09-01), Taylor
patent: 07-301119 (1995-11-01), None

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