Diesel engine and piston assembly therefor

Details Diesel engine and piston assembly therefor Diesel engine and piston assembly therefor

1979-02-26

1981-03-03

Hershkovitz, Abraham

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

92 61, 92208, 277216, F02F 302

Patent

active

042534356

ABSTRACT:
An automotive diesel engine is provided with pistons which carry two compression rings and an oil control ring in the conventional manner, the cold end clearance of the second compression ring being greatly exaggerated compared to the cold end clearance of the top compression ring and the annulus defined by the second land of the piston, the two compression rings and the engine cylinder wall having an empirically determined volume, preferably in the range of about 0.12 cubic inches to about 0.35 cubic inches. The top land of the piston is preferably set back to provide exaggerated diametrical clearance with the cylinder wall.

REFERENCES:
patent: 2072623 (1937-03-01), Illmer
patent: 3007302 (1961-11-01), Vincent
patent: 3463057 (1969-08-01), Packard
patent: 3623463 (1971-11-01), De Vries
patent: 3667443 (1972-06-01), Currie
patent: 3738231 (1973-06-01), Zurner
patent: 4058981 (1977-11-01), Henson
patent: 4111104 (1978-09-01), Davison, Jr.
Society of Automotive Engineers, Inc., "Small Bore Diesel Engine . . . Control", Sep. 8-11, 1975, pp. 1-12.
"Powerplant Components and Accessories", SAE Handbook 1977, Society of Automotive Engineers, Inc., pp. 25.35-25.37.
"Engine Specifications for 3406 Diesel Truck Engine", Caterpiller Tractor Company, Sep. 1974, p. 26.
"New Developments in Piston Rings for the Modern Diesel Engine", Soc. of Automotive Engineers, Sep. 1975, pp. 1-30.

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