Internal combustion engines and engine components

Details Internal combustion engines and engine components Internal combustion engines and engine components

1990-03-05

1990-12-04

Dolinar, Andrew M.

Expansible chamber devices

Piston

Open-ended hollow skirt type

123193P, F02F 300

Patent

active

049744984

ABSTRACT:
Improvements in internal combustion engines and/or components thereof resulting from applying thin coatings or films of synthetic diamond or diamond-like material thereto and, in certain instances, overcoating such synthetic diamond material with a thin layer of chromium for providing certain protective effects. In one form, the entire piston of an internal combustion engine is coated with a thin layer of synthetic diamond material protecting same against heat and chemical corrosion effects during the operation of the engine. In another form, piston rings or ring components are coated with such synthetic diamond material in thicknesses varying from 0.00001" to 0.001" or more. Retaining cavities formed in the head of the piston which retain the piston rings may also be similarly coated. The piston pin and/or its retaining rings may also contain such synthetic diamond material coating as may the top and side walls of the piston. An overcoating of a hard film of chromium may be applied to one or more of the engine components against the synthetic diamond material to protect same against particle erosion and abrasion. Other engine components so protected may include the engine crank shaft or those portions thereof subjected to wear when the surfaces of the bearings of the piston rods engage same and the bearings in which the crank shaft rotates.

REFERENCES:
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patent: 3552370 (1971-01-01), Briggs
patent: 3911891 (1975-10-01), Dowell
patent: 4334507 (1982-06-01), Kohnert et al.
patent: 4798770 (1989-01-01), Dunomoto et al.
patent: 4859493 (1989-08-01), Lemelson
patent: 4863807 (1989-09-01), Krasicky

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