Cummins Inc.

Cummins Engine Company, Inc.

William R Storkman

Terrence M Shaw

Glen R Alden

Reid M Irish

Jay F Leonard

Brett I Barnhart

Michael Kosinski

Timothy D Britt

Jonathan H Raub

David H Parsons

Spencer C Johnston

Robert G Tickel

James R Duke

Benjamin J Moshier

James D Curtis

Devaraj Doraiswamy

Matthew G Leddy

An exhaust system of an internal combustion engine includes a slip joint with a female section having an opening with an inner diameter, a male section having an outer diameter smaller than the inner diameter of the opening of the female section, the male section being at least partially received in the female section, a wear sleeve disposed between the female section and the male section, and at least one seal contacting the wear sleeve and at least one of the female section and the male section, to seal the slip joint.

Exhaust system slip joint

A fastener and a method for reducing stress failure in a fastening joint of an internal combustion engine component are provided. The threaded fastener may be a bolt or a stud secured to an engine block. The fastener has a threaded tip portion with a radius and a distal end. The threaded tip portion is inserted into a threaded hole to define a threaded interface. In one embodiment, the load carrying capability is increased by progressively reducing the radius of at least a part of the threaded tip portion. In another embodiment, the load carrying capability is increased by an axially extending hole at the distal end of the threaded tip portion, the hole having a progressively reduced diameter.

Fastener and method for reducing stress failure in an engine component

An assembly including an engine component, such as a fuel injector, seated against a seating surface of a cylinder head is provided with a positive seal contact an uppermost point of contact between an injector sleeve and a seating surface of the cylinder head. The positive seal contact prevents coolant from the water jacket from travelling below the uppermost point of contact, thereby avoiding cavitation damage which might otherwise occur by the entrapment of liquid between the cylinder head seating surface and the injector sleeve. In an embodiment, a raised annular ridge is formed in the seating surface of the cylinder head at the location of the uppermost point of contact. This ridge becomes embedded in the injector sleeve. Also, in an embodiment, the cylinder head includes a circular recess upwardly from the uppermost point of contact. Although coolant from the water jacket can enter the recess, the recess radially separates the cylinder head from the injector sleeve by an amount that will not be closed under deflection due to cyclic loading on the injector.

Fuel injector seat assembly with positive contact seal between fuel

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Columbus, IN, United States of America

William R Storkman