Reduced friction piston

Details Reduced friction piston Reduced friction piston

1989-10-11

1991-01-29

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

92223, F02F 300

Patent

active

049878654

ABSTRACT:
A piston assembly (10) of the type for reciprocating in an internal combustion engine. The assembly (10) includes an integral aluminum head (12) and skirt (14). The skirt (14) has an outer surface for engaging a cylinder wall which includes a plurality of pointed ridges (24). The pointed ridges (24) extend annularly about the skirt (14) and are each separated by a valley (26). The ridges (24) and valleys (26) are coated with a fluorocarbon polymer. The piston therefore has an improved wear surface for increasing the efficiency of the engine.

REFERENCES:
patent: 2817562 (1957-12-01), Fleming et al.
patent: 4075934 (1978-02-01), Wacker et al.
patent: 4230027 (1980-10-01), Promeyrat
patent: 4354424 (1982-10-01), Nordlund

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