Cylinder block

Details Cylinder block Cylinder block

1995-04-18

1996-07-23

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

123 4184, F02F 100, B22D 1900

Patent

active

055379699

ABSTRACT:
A cylinder block is produced by subjecting an outer surface of a cylinder sleeve section Sc of cast iron to a shot blast treatment, forming a first intermediate layer 31 of aluminum-based material containing Si, Cu and the like on the cylinder section Sc, and inserting the cylinder sleeve section Sc in a cast-in manner within a cylinder barrel 1.sub.U of aluminum alloy. The electrical-potential difference between the cylinder sleeve section Sc and the cylinder barrel 1.sub.U and the first intermediate layer 31 is decreased by the first intermediate layer 31 to enhance the durability against an electrolytic corrosion and to enhance the deposition by a mutual diffusing action therebetween. In a modification, a second intermediate layer 32 of a Ni-Al based material is formed under the first intermediate layer 31 at a portion of the cylinder sleeve section Sc inserted in a cast-in manner within the cylinder barrel 1.sub.U, whereby the adhesion can be further enhanced.

REFERENCES:
patent: 2879116 (1959-03-01), Goetze
patent: 4202310 (1980-05-01), Zorrilla
patent: 4447275 (1984-05-01), Hiraoka et al.
patent: 4616603 (1986-10-01), Kubis
patent: 5148780 (1992-09-01), Urano
patent: 5402754 (1995-04-01), Gunnarsson

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