Method of making a cast engine cylinder having an internal passa

Details Method of making a cast engine cylinder having an internal passa Method of making a cast engine cylinder having an internal passa

1989-11-28

1990-11-13

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

295276, 29888061, 164 98, B23P 1500

Patent

active

049692631

ABSTRACT:
A cast cylinder for an internal combustion engine having an intake valve cavity located on one side of the piston bore, an intake bore for communication with a carburetor located on the other side of the piston bore, and an internal passageway cast therein communicating the intake bore and the intake valve cavity. The internal passageway is curved and circumscribes a portion of the intake bore. A walled hollow tube having initially closed ends is embedded in the cast cylinder during casting as a permanently retained casting core. Subsequently the ends of the embedded tube are machined open to communicate with the intake valve cavity and the intake bore, respectively, to define the internal passageway.

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