Internal combustion engine and method for making the same

Details Internal combustion engine and method for making the same Internal combustion engine and method for making the same

1989-02-27

1991-07-16

Seidel, Richard K.

Metal founding

Process

Shaping a forming surface

164246, 164249, B22C 702, B22C 904

Patent

active

050316850

ABSTRACT:
A foam pattern assembly for use in forming an engine block in a lost foam casting process, the pattern assembly comprising a base portion including a generally planar front mounting surface having therein a plurality of crankcase-defining cavities and a plurality of intake ports, and a rear mounting surface spaced from the front mounting surface, the base portion partially defining a plurality of transfer passages and a plurality of air intake passages each communicating between a respective one of the intake ports and a respective one of the transfer passages, and a cylinder portion including a generally planar front mounting surface mating with the rear mounting surface on the base portion, the cylinder portion partially defining the air intake passage and partially defining a plurality of cylinder bores each communcating with a respective one of the transfer passages.

REFERENCES:
patent: 3635280 (1972-01-01), Parsons
patent: 3830285 (1974-08-01), Schrader, Jr.
patent: 4632169 (1986-12-01), Osborn et al.
patent: 4777997 (1988-10-01), Corbett
patent: 4802447 (1989-02-01), Corbett

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