Cylinder liner having EGR coating
AssigneeFederal-Mogul World Wide, Inc.
InventorsTom Bedwell, Carmo Ribeiro, Miguel N. D. De Azevedo
Life of this patent
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Abstract
A ferrous cylinder liner for use in diesel engines equipped with exhaust gas recirculation has at least a portion of its inner surface covered by an electroless coating of nickel. The coating has a maximum thickness of 8 micrometers and presents a continuous, non-porous barrier which protects the ferrous liner against attack from the corrosive EGR environment.
Claims13
A cylinder liner for a diesel engine having exhaust gas recirculation, comprising:
- a ferrous cylinder liner body having an inner surface;
- and
- an EGR coating of electroless nickel applied to at least a portion of said inner surface and providing a continuous, non-porous barrier against corrosive effects of the exhaust gas recirculation environment of the diesel engine, wherein said EGR coating has a ready to use surface finish in its as-applied condition.
A cylinder liner for use in diesel engines having exhaust gas circulation, comprising:
- a ferrous cylinder liner body having an inner surface;
- and
- an EGR coating of electroless nickel applied to at least a portion of said inner surface to a maximum thickness of about 8 micrometers and providing a continuous, non-porous barrier with a ready-to-use surface finish in its as-applied condition to protect said ferrous liner body against corrosive attack by the exhaust gas recirculation environment of the diesel engine.
A method of manufacturing a cylinder liner for use in diesel engines having exhaust gas recirculation comprising:
- providing a ferrous cylinder liner body having an inner surface;
- final finishing the inner surface to a predetermined surface finish;
- applying a continuous, non-porous electroless EGR nickel coating to at least a portion of the inner surface;
- and
- installing the coated cylinder liner body in a diesel engine with the EGR coating in its as-applied condition.
Dependencies are inferred from the claim text.