Electro-motive Diesel, Inc.

Gm Global Technolgoy Operations, Inc.

Progress Rail Locomotive Inc.

Frank M Graczyk

Budhadeb Mahakul

Randal K Albright

Kenneth M Sinko

Chih L Liu

Rafiqul Islam

Farhan Ferozali Devani

Edward John Cryer

Brent Valesano

Verne E Rezabek

A piston ring set for internal combustion (IC) engine is provided. The IC engine includes a cylinder having a liner and a finish on the liner. A piston having a crown and a set of grooves is disposed in the cylinder. A set of piston rings is disposed in the set of grooves. The piston rings are disposed in order from closest to the crown and include at least a first compression ring having free ends defining a first end gap, a second compression ring having free ends defining a second end gap. A nominal value of the first end gap of the first compression ring is greater than a nominal value of the second end gap of the second compression ring.

Piston ring set for internal combustion engine and system and method thereof

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 NO(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.

Optimized low emission two-stroke internal combustion diesel engine

A diesel locomotive engine having a piston with a unique bowl geometry. The bowl is defined in part by a center portion having a partial spherical shape. A cone portion () is located adjacent the central portion. An annular toroidal surface () is connected to the cone portion () and is defined by a toroidal major diameter (Dtm) and a toroidal minor radius (Rtm). A crown rim () is connected to the annular toroidal surface () and to an upper flat rim face of a sidewall.

Low emission fuel efficient diesel locomotive engine including a piston having a toroidal surface

Engine reconfiguration kits are developed for NOx emission reduction in Electro-Motive Division of General Motors Corporation model 645 diesel engines. The kits feature improved unit fuel injectors providing better fuel atomization with retarded injection timing and other improvements. Included new higher efficiency four pass counterflow aftercoolers provide reduced airbox inlet air temperatures. New connector pipes for the counterflow aftercoolers may also be included. Optional higher compression ratio pistons are available for increased fuel efficiency in some engine types. The kits reduce NOx emissions without increasing smoke, CO or particulate emissions or reducing performance.

Emission reduction kit for EMD diesel engines

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Darien, IL, United States of America

Frank M Graczyk