Piston unit of an internal combustion engine

Details Piston unit of an internal combustion engine Piston unit of an internal combustion engine

1995-04-18

1997-02-11

Denion, Thomas E.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92208, 1231936, F16J 104

Patent

active

056010109

ABSTRACT:
Piston unit used in an internal combustion engine, which allows no interfacial crack between a piston and a wear-proof ring as well as allowing to provide T6 treatment to aluminum base alloy used for the piston. The piston unit has a piston formed of aluminum base alloy, and a wear-proof ring that has been fused with a first ring groove of the piston. The wear-proof ring is formed of copper-zinc alloy with its thermal expansion coefficient ranging from 19.5.times.10.sup.-6 m/m to 22.0.times.10.sup.-6 m/m. The copper zinc alloy may contain 63 wt. % of copper, 30 wt. % of zinc, 15 wt. % of aluminum, and 4% of titanium, or it may contain 70 wt. % of copper and 30% of zinc only.

REFERENCES:
patent: 4595638 (1986-06-01), Dohnomoto et al.
patent: 4868067 (1989-09-01), Fujisawa et al.
patent: 5346668 (1994-09-01), Tanaka et al.
patent: 5449421 (1995-09-01), Hamajima et al.

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