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US 2013/0199490 A1Published application
Repaired engine block and repair method
AssigneeFord Global Technologies, LLC
InventorsLeander Schramm, Ralph W. K. Wilton, Barry Griffiths, Clemens Maria Verpoort, Wolfgang Puetz, Mark Robert Silk, David Harknett
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Abstract
A block for an internal combustion engine having at least one coated cylinder bore, which has a chamfer at a sealing surface with respect to a cylinder head, wherein the chamfer is a curved chamfer.
Claims8
An engine block formed of a first material and defining a cylinder bore terminating at a sealing surface, comprising:
- a bore liner within the cylinder bore and formed of a second material, an end of the liner spaced from the sealing surface to leave an annular surface of the first material exposed adjacent the sealing surface;
- and
- a curved chamfer at a sealing surface end of the bore and extending into the annular surface and the end of the liner
A method of repairing a worn liner in an engine block cylinder bore comprising:
- machining the liner to form an inlet surface of increased diameter terminating a distance from a sealing surface end of the bore;
- spraying a repair coating onto the inlet surface;
- machining the coating to a nominal bore diameter;
- and
- forming a curved chamfer at the sealing surface end of the bore and extending into the bore to the liner.
2 more elements
Dependencies are inferred from the claim text.