Piston, engine and operating method for reduced production of particulate matter

US9328693B2 · kind B2 · utility

Assignee

• Electro-Motive Diesel, Inc. · US

Inventors

• David A. Pierpont · Peoria, US
• John P. Timmons · Chillicothe, US
• Michael B. Goetzke · Orland Park, US
• Kenneth M. Sinko · Oak Park, US
• Reddy Pocha Siva Sankara · Lisle, US

Key dates

• Filing date: Jul 17, 2013
• Grant date: May 3, 2016
• Expiry date: Mar 29, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A piston for reduced production of particulate matter during combustion of a fuel directly injected after a top dead center position includes a piston body defining a piston body diameter of about 263 mm, and a combustion face upon the first axial body end. The combustion face includes a combustion bowl, and an annular piston rim extending circumferentially around the combustion bowl. Inner and outer rim surfaces together comprise a horizontal width of the rim in a ratio of about 1:1 to about 2:1. The inner rim surface includes a chamfer sloping from about 9° to about 11°, such that a profile of the rim is relieved to limit deflection by the piston of the directly injected fuel toward a cylinder wall.