Galleryless piston with improved pocket cooling

US10428761B2 · kind B2 · utility

Assignee

• Tenneco GmbH · DE

Inventors

• Thomas Scherbaum · Forchheim, DE
• Sven Ungermann · Nuremberg, DE
• Harald Mergler · Nuremberg, DE
• Josef Harrer · Hilpoltstein, DE
• Michael Seiffert · Nuremberg, DE
• Georg Hopp · Nuremberg, DE
• Arnd Baberg · Bad Mergentheim, DE
• Hanno Necker · Nuremberg, DE
• Michael Weinenger · Southfield, US
• Jeffrey L. Riffe · Troy, US

Key dates

• Filing date: Feb 21, 2017
• Grant date: Oct 1, 2019
• Expiry date: May 21, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02F2200/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.