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CYLINDER BORE HAVING VARIABLE COATING

United States Patent Application

20170260926
A1
View the Complete Application at the US Patent & Trademark Office
Engine blocks and methods of forming the same are disclosed. The engine block may comprise a body including at least one cylindrical engine bore wall having a longitudinal axis and including a coating extending along the longitudinal axis and having a coating thickness. The coating may have a middle region and first and second end regions, and a plurality of pores may be dispersed within the coating thickness. The middle region may have a different average porosity than one or both of the end regions. The method may include spraying a first porosity coating in a middle longitudinal region of the bore and spraying a second porosity coating in one or more end regions of the bore. The first porosity may be greater than the second porosity and the first and second porosities may be formed during the spraying steps. The pores may act wells for lubricant.
MAKI, CLIFFORD E. (NEW HUDSON, MI), ELIE, LARRY DEAN (YPSILANTI, MI), BEYER, TIMOTHY GEORGE (TROY, MI), GANGOPADHYAY, ARUP KUMAR (NOVI, MI), GHAEDNIA, HAMED (WEST BLOOMFIELD, MI), BOILEAU, JAMES MAURICE (NOVI, MI)
15/ 064,903
March 9, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] The invention was made with Government support under Cooperative Agreement DE-EE0006901 awarded by the Department of Energy. The Government has certain rights to the invention.