Effects of PuriNOx™ Water-Diesel Fuel Emulsions on Emissions and Fuel Economy in a Heavy-Duty Diesel Engine 2002-01-2891
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.
Citation: Matheaus, A., Ryan, T., Daly, D., Langer, D. et al., "Effects of PuriNOx™ Water-Diesel Fuel Emulsions on Emissions and Fuel Economy in a Heavy-Duty Diesel Engine," SAE Technical Paper 2002-01-2891, 2002, https://doi.org/10.4271/2002-01-2891. Download Citation
Andrew C. Matheaus, Thomas W. Ryan, Dan Daly, Deborah A. Langer, Mark P. B. Musculus
Southwest Research Institute™, The Lubrizol Corporation, Sandia National Laboratories
SAE Powertrain & Fluid Systems Conference & Exhibition
Alternative Diesel Fuels-PT-111, SAE 2002 Transactions Journal of Engines-V111-3