Mahle International Gmbh

Nikhil Nachappa

Steven John Sytsma

Jason Bieneman

Searle Frei

A composite engine component comprises a body having an outer circumferential surface and an inner circumferential surface. The body of the engine component is of unitary, integral, one-piece construction and comprises a radially inner section and a radially outer section having different material compositions. The radially inner section and the radially outer section of the body are welded together using a magnetic pulse welding process in which a metallurgical bond is formed along a bonding interface between the inner and outer sections of the body.

Magnetic pulse welding of engine components

A piston having a piston crown with a combustion chamber, and a circumferential ring belt extending from the piston crown and having a plurality of ring grooves separated by piston lands. At least one of the piston lands, ring grooves or top surface of the crown is provided with a coating comprising hexagonal boron nitride. The coating can be made solely of hexagonal boron nitride, or can additionally include a resin. The coating can be a single layer coating or a multiple layer coating.

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Dearborn, MI, United States of America

Nikhil Nachappa