Gm Global Technolgoy Operations, Inc.

Jared Matthew Satkowiak

Qigui Wang

Alan William Hayman

Robert S McAlpine

Ronald John Petrus

Richard D Ricchi

Hsiao F Wong

Kenneth E Schroeder

An additive manufactured piston having a crown portion and a skirt portion form of an aluminum-cerium-silicon alloy. The piston includes a least one recess pocket in an unstressed region located at an interface between an inner surface of the crown portion and an outer surface of the skirt portion. The skirt portion includes an outer panel surface defining an external rib adjacent a peripheral end surface, at least one stiffening rib extending from a pin boss to a skirt end, and a wall thickness of between 0.2 mm and 1.0 mm in a region between the external rib and the at least one stiffening rib. The skirt portion further includes an internal first rib having a width Won a thrust side portion and an internal second rib having a width Wlocated on an anti-thrust side portion, in which Wis greater than W

Piston for use in internal combustion engines and method of making the piston

An improved cam follower for a vehicle engine includes a body, a spring seat, a tower, a spring and an anti-rotation member. The body defines a body diameter, a first open end, and a second end. The spring seat includes a spring seat opening and an interlock portion. The spring seat may be affixed to the first open end of the body. The spring seat further includes a spring seat diameter wherein the spring seat diameter is greater than the body diameter. The tower may be disposed in a pin housing through the spring seat opening at the first open end of the body. The tower further includes an upper flange and a spring which abuts the upper flange at a first spring end. The second spring end abuts the spring seat. The anti-rotation member accordingly may be coupled to the body via the spring seat.

Cam follower assembly and method of manufacturing thereof

Growing community of inventors

Grand Blanc, MI, United States of America

Jared Matthew Satkowiak