Engine block and cylinder liner assembly and method

Details Engine block and cylinder liner assembly and method Engine block and cylinder liner assembly and method

F - Mech Eng,Light,Heat,Weapons

02

B

F02B 75/08 (2006.01) F02F 1/10 (2006.01) F02F 1/12 (2006.01)

Patent

CA 2120026

2120026 9307369 PCTABS00021 An engine block (10) for an internal combustion engine including at least one bore (18), and a cylindrical liner (20) that is pressed into the bore (18) to define the inner cylindrical surface (24) along which the piston (34) reciprocates. The inner surface of the bore (18) and the outer surface (26) of the liner (20) are each coated with a zinc or zinc alloy coating that is metallurgically bonded to the respective surfaces to form intermetallic bonds. The liner (20) is pressed into the bore (18) while the liner (20) and bore (18) are at an elevated temperature approximately corresponding to the melting temperature of zinc, in order to unite the liner (20) and block (18) by means of a metallurgical bond. The metallurgical bond is substantially continuous to provide a continuous metallic path for improved heat transfer and structural strength between the liner (20) and the block material. The liner (20) can be formed either from cast iron or from an aluminum alloy, and the engine block (10) is preferably cast from an aluminum alloy.

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