Cylinder or cylinder liner

Details Cylinder or cylinder liner Cylinder or cylinder liner

1980-05-19

1983-07-19

Feinberg, Craig R.

Internal-combustion engines

Frame construction

Horizontal cylinder

123668, 291567R, 277224, F02F 100

Patent

active

043938213

ABSTRACT:
An internal combustion engine including a piston and cylinder liner in which the cylinder liner is provided with plural annular hardened layers formed on the inner peripheral surface thereof in the vicinity of the top dead center of the piston. The distance between adjacent ones of the annular hardened layers is smaller than the axial length of a piston ring employed with the piston. The width of each of the hardened layers is in a range of from one-half to twice the axial length of the piston ring. The hardened layers may be formed by hardening with a laser beam. The piston ring can be provided with a hardened layer on its outer surface. The piston ring preferably has a barrel shape.

REFERENCES:
patent: 3560006 (1971-02-01), Watanabe
patent: 3620137 (1971-11-01), Prasse
patent: 3814447 (1974-06-01), Prasse et al.
patent: 4059876 (1977-11-01), Ditto
patent: 4182299 (1980-01-01), Earle et al.
patent: 4307890 (1981-12-01), Cromwell et al.

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