Effects of PuriNOx Water-Diesel Fuel Emulsions on Emissions and Fuel Economy in a Heavy-Duty Diesel Engine Southwest Research Institute

Format:

Book

Conference/Event

Author/Creator:

Matheaus, Andrew C., author.

Conference Name:

SAE Powertrain & Fluid Systems Conference & Exhibition (2002-10-21 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

The engine-out emissions and fuel consumption rates for a modern, heavy-duty diesel engine were compared when fueling with a conventional diesel fuel and three water-blend-fuel emulsions. Four different fuels were studied: (1) a conventional diesel fuel, (2) PuriNOx, a water-fuel emulsion using the same conventional diesel fuel, but having 20% water by mass, and (3,4) two other formulations of the PuriNOx fuel that contained proprietary chemical additives intended to improve combustion efficiency and emissions characteristics. The emissions data were acquired with three different injection-timing strategies using the AVL 8-Mode steady-state test method in a Caterpillar 3176 engine, which had a calibration that met the 1998 nitrogen oxides (NOX) emissions standard. The weighted NOX and particulate matter (PM) emissions for the PuriNOx fuel were reduced from those for the conventional diesel fuel by 19% and 16%, respectively, while the brake specific energy consumption was reduced by 0.7%. Insight into the spray formation and combustion characteristics of water emulsions was gained through analysis of heat-release rate data, and through laser-based optical/imaging experiments performed in a companion study, using a second, single cylinder, optically-accessible diesel engine. Based on this insight, several in-cylinder mechanisms are proposed which may be responsible for the observed changes in exhaust emissions and fuel consumption observed with these water-blend-fuels

Notes:

Vendor supplied data

Publisher Number:

2002-01-2891

Access Restriction:

Restricted for use by site license