Low weight reciprocating engine

Details Low weight reciprocating engine Low weight reciprocating engine

1976-12-22

1979-01-30

Lazarus, Ronald H.

Internal-combustion engines

Multiple cylinder

Cylinders radiating

123 52MC, 123193CH, 123193H, F02B 7522

Patent

active

041366484

ABSTRACT:
An internal combustion V-8 engine is disclosed having an aluminum semi-permanent mold head cast by a low-pressure die-cast process and an iron block cast by the evaporative casting method. The block and head have controlled thickness walls throughout to optimally lower the metal/working volume ratio of the engine. The block employs barrel cylinder walls cast integrally and unsupported except at the barrel ends and at a siamese connection between adjacent barrels; the barrels are maintained under a predetermined level of compression to eliminate fatigue failure and suppress sound. The block is sand cast and the head is totally formed with a three piece die and one sand core cluster, except for one passage which is drilled subsequent to casting. The engine is reduced in weight by at least 20% over conventional comparable engines; torque and horsepower is improved even though the cooling system capacity has been reduced to less than half that of a conventional cooling system.

REFERENCES:
patent: 1825769 (1931-10-01), Barbarou
patent: 2054926 (1936-09-01), Caminez et al.
patent: 2851020 (1958-09-01), Dolza
patent: 2974654 (1961-03-01), Bouvy
patent: 2996050 (1961-08-01), Caris
patent: 3166054 (1965-01-01), Conover
patent: 3166992 (1965-01-01), Francis
patent: 3186387 (1965-06-01), Kolbe et al.

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