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US 5,537,969 AGranted
Cylinder block
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsTsunehisa Hata, Hideo Shimizu, Kenji Matsumoto
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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsTsunehisa Hata, Hideo Shimizu, Kenji Matsumoto
Estimating the term…
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.
A cylinder block of a wet liner type, comprising a cylinder sleeve section of an iron-based material inserted in a cast-in manner within a cylinder barrel of an aluminum-based material, said cylinder block further including an intermediate layer of an aluminum-based material provided on a contact surface of an outer periphery of said cylinder sleeve section in contact with said cylinder barrel and on a contact surface of the outer periphery in contact with cooling water.
A cylinder block of a wet liner type, comprising a cylinder barrel of an aluminum-based material, a cylinder sleeve of an iron-based material mounted in a cast-in manner in said cylinder barrel, an intermediate layer of an aluminum-based brazing material provided on at least a contact surface portion of an outer periphery of said cylinder sleeve in cast-in contact with said cylinder barrel.
Dependencies are inferred from the claim text.