Inlet port flat wall section

Details Inlet port flat wall section Inlet port flat wall section

1998-12-21

2000-04-11

Solis, Erick R.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

123308, B22D 2502

Patent

active

060474734

ABSTRACT:
A cylinder head for an internal combustion engine of the reciprocating piston type includes a helical inlet port with a flat wall portion in a section of the port upstream of a bowl-shaped recess about a valve stem guide. The flat walled section meets a generally cylindrical portion of the recess adjacent a cusp-shaped swirl edge. The orientation of the flat portion with respect to a reference feature, such as the axis of the valve stem guide, may then be used as a measure of the accuracy of casting of the inlet port, and may also be altered if so desired to vary the swirl characteristics of the inlet port.

REFERENCES:
patent: 4873953 (1989-10-01), Muranaka et al.
patent: 5557834 (1996-09-01), Miyanaka et al.
patent: 5855194 (1999-01-01), Okumura et al.

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