Method of making and apparatus for monoblock engine construction

Details Method of making and apparatus for monoblock engine construction Method of making and apparatus for monoblock engine construction

1989-01-13

1990-07-03

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

123193CH, F02F 700

Patent

active

049381830

ABSTRACT:
A method of making a cast dual-metal monoblock, by (i) casting an iron-based insert to define walls for one or more chambers or passages for each of combustion, piston reciprocation, gaseous induction and gaseous exhaust; (ii) forming a sand core wrapping directly about said insert to cover such insert except for the extremities of the walls defining the passages for gaseous induction and exhaust and the chamber for piston reciprocation, such extremities being remote from the walls defining the combustion chamber; and (iii) die casting an aluminum-based metal jacket about the assembly of said insert and core wrapping to complete the dual-metal monoblock. Advantageously, in step (ii), there is further included the formation of a top sand core assembly for defining one or more oil and/or valve train passages or chambers, the top sand core assembly being stationed to rest on the insert during casting of the jacket.

REFERENCES:
patent: 2202643 (1940-05-01), Berger
patent: 2456272 (1948-12-01), Gregory
patent: 2879116 (1959-03-01), Goetze
patent: 4630345 (1986-12-01), Lutz
patent: 4699100 (1987-10-01), Leydorf et al.

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