Combination of a cylinder liner and a piston ring

Details Combination of a cylinder liner and a piston ring Combination of a cylinder liner and a piston ring

2007-08-30

2009-02-24

McMahon, M. (Department: 3741)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

C123S193400, C123S193200

Reexamination Certificate

active

07493882

ABSTRACT:
A combination of a cylinder liner and a piston ring, wherein the cylinder liner includes, silicon: 23.0-28.0% by weight, magnesium: 0.80-2.0% by weight, copper: 3.0-4.5% by weight, iron: 0.25% by weight or less, nickel: 0.01% by weight or less, wherein surface roughness profile of the inner circumference surface has Rz=0.5 to 1.0 μm, Rk=0.2 to 0.4 μm, Rpk=0.05 to 0.1 μm, Rvk=0.08 to 0.2 μm, wherein the piston ring includes carbon: 0.6-0.7% by weight, chrome: 13-14% by weight, molybdenum: 0.2-0.4% by weight, silicon: 0.25-0.50% by weight, manganese: 0.2-0.5% by weight, and wherein carbides with the diameter of 5.0 μm and less are 4-10%.

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