Mahle International Gmbh

Tenneco Gmbh

Mahle Technology, Inc.

Juan Gildemeister

Michael T Lapp

Andrew John Miller

Wolfgang Rein

Florin Muscas

Steve Walker

Dawnelle Wielosinski

Stan Sorin

An aluminum piston including a cooling gallery with titled inner and outer side walls is provided. The piston comprises a ring belt with a ring grooves, and an iron insert is disposed in a top one of the ring grooves. To reduce stress and mass of the piston, material located under the iron insert is removed, so that the outer side wall of the cooling gallery is tilted toward the center axis. The inner side wall of the cooling gallery is tilted away from the center axis.

Piston with broad ovate gallery

A piston and connecting rod assembly wherein the piston includes an inner cooling gallery defined in the body thereof beneath the crown of the piston, an outer cooling gallery defined between the skirt of the piston and the body and beneath the crown. A pin bore is formed in the body. A connecting rod is adapted to interconnect the piston and crankshaft where the connecting rod has at least one end with a bore extending therethrough and adapted to be aligned with the pin bore of the piston. At least one end of the connecting rod is in fluid communication with the inner cooling gallery of the piston and includes a reservoir formed on the end of the connecting rod which is adapted to collect coolant therein.

Piston and connecting rod assembly having improved cooling characteristics

A piston for an internal combustion engine is provided. The piston crown includes an interior surface that defines at least in part a cooling gallery and a cooling gallery surface within the piston. An annular surface may defines at least in part an annular passageway that allows fluid communication between an outer surface of the piston and the cooling gallery. Opposing annular surfaces may be abutted with a predetermined force, thereby limiting fluid flow from the cooling gallery to an outer surface of the piston. Further, an annular surface may extend into the cooling gallery to form a deflector along the cooling gallery surface, thereby limiting fluid flow from the cooling gallery to an outer surface of the piston.

Piston with a cooling gallery

Growing community of inventors

Howell, MI, United States of America

Juan Gildemeister