Optimized low emission two-stroke internal combustion diesel engine

US7370627B2 · kind B2 · utility

Assignee

• Electro-Motive Diesel, Inc. · US

Inventors

• Budhadeb Mahakul · Naperville, US
• Kenneth M. Sinko · Oak Park, US
• Rafiqul Islam · Naperville, US
• Chih L. Liu · Naperville, US
• Frank M. Graczyk · Darien, US
• Brent Valesano · Des Plaines, US
• Randal K. Albright · Hillsboro, US

Key dates

• Filing date: Dec 13, 2004
• Grant date: May 13, 2008
• Expiry date: Dec 13, 2024

Classification

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

Abstract

An optimized two-stroke internal combustion diesel engine, suitable for locomotive applications, has been developed to meet the EPA locomotive Tier 2 emission standards. To achieve a low emission target below the EPA Tier 2 standards for NOx (5.5 g/bhp-hr) and particulates (0.2 g/bhp-hr), several innovative changes have been made to the engine. These changes include: a new piston bowl geometry; low oil consumption piston rings; optimized surface finish cylinder liner; optimized fuel injection camlobe; modified fuel injector nozzle; new efficient aftercooler; optimized oil separator; and optimized turbocharger.