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Influence of the Fuel Injection Equipment on NOx Emissions and Particulates on a Large Heavy-Duty Two-Stroke Diesel Engine Operating on Water-in-Fuel Emulsion
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 01, 1994 by SAE International in United States
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Tests were carried out with the aim of studying the influence of the fuel-injection equipment (FIE) on gaseous and particulate-mass (PM) emissions when using water-in-fuel emulsion. The tests included different pump-nozzle combinations, a new slide-valve-type fuel injector, water-in-fuel emulsion and different fuel-sulphur contents. The NOx reduction is compared with the results of several other tests in large two-stroke engines using water emulsions.
A NOx reduction of approximately 25% was obtained using a large pump-nozzle combination and 30% added water, without deterioration in the specific fuel oil consumption. The NOx behaviour is correlated to the injection intensity as well as to a water-amount effect.
Fuel sulphur has a major influence on PM, as sulphates account for approximately 35% of the total PM when operating on ‘normal’ heavy fuel. A linear approximation estimates the ‘non-sulphur’ fuel PM at between 30 and 60 mg/Nm3, depending on the FIE system. No simple correlation was found to explain the PM behaviour in the test.
CitationHenningsen, S., "Influence of the Fuel Injection Equipment on NOx Emissions and Particulates on a Large Heavy-Duty Two-Stroke Diesel Engine Operating on Water-in-Fuel Emulsion," SAE Technical Paper 941783, 1994, https://doi.org/10.4271/941783.
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