Heat-insulating layer to prevent temperature drop of combustion

Details Heat-insulating layer to prevent temperature drop of combustion Heat-insulating layer to prevent temperature drop of combustion

1979-03-02

1981-03-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

123193H, 123193P, 123669, 164 97, B22D 1908

Patent

active

042546214

ABSTRACT:
A heat-insulating layer secured to a cast metal member of an internal combustion engine so as to be exposed to combustion gas in the engine. A porous or intersticed metal body, preferably having a soft structure, is used as a fundamental material of this layer. A surface portion of the porous metal body is impregnated with a ceramic material, and then the metal body is cast-inserted into the metal member such that the molten metal infiltrates into another surface portion of the porous metal body and that the ceramic-impregnated portion is exposed to combustion gas in the engine. This heat-insulating layer is excellent in toughness, durability and bonding strength and can be embodied in a combustion chamber wall, exhaust port wall or a top portion of a piston.

REFERENCES:
patent: 2657961 (1953-11-01), Lassberg
patent: 2874429 (1959-02-01), Emter
patent: 3396777 (1968-08-01), Reding
patent: 3408995 (1968-11-01), Johnson
patent: 3718172 (1973-02-01), Rice
patent: 3756303 (1973-09-01), Valdo
patent: 3786795 (1974-01-01), Kaneko
patent: 3903951 (1975-09-01), Kaneko
patent: 4074671 (1978-02-01), Pennila
patent: 4167207 (1979-09-01), Rao

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