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Exhaust emissions from an indirect injection dual-fuel engine
Faculty
Science
Year:
2000
Type of Publication:
Article
Pages:
333-340
Authors:
Soliman, HA, Abd Alla, GH, Badr, OA, Abd Rabbo, MF
DOI:
10.1243/0954407001527457
Journal:
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING PROFESSIONAL ENGINEERING PUBLISHING LTD
Volume:
214
Research Area:
Engineering; Transportation
ISSN
ISI:000088663000008
Keywords :
exhaust emissions, dual-fuel engine, pilot fuel, gaseous fuel, injection timing, intake temperature, combustion characteristics, NOx emissions
Abstract:
Diesel engines operating on gaseous fuels are commonly known as dual-fuel engines. In the present work, a single-cylinder, compression ignition, indirect injection research (Ricardo E6) engine has been installed at United Arab Emirates University for investigation of the exhaust emisssions when the engine is operating as a dual-fuel engine. The influence of changes in major operating and design parameters, such as the concentration of gaseous fuel in the cylinder charge, pilot fuel quantity, injection timing and intake temperature, on the production of exhaust emissions was investigated. Diesel fuel was used as the pilot fuel, while methane or propane was used as the main fuel which was inducted in the intake manifold and mixed with the intake air. The experimental investigations showed that the poor emissions at light loads can be improved significantly by increasing the concentration of gaseous fuel (total equivalence ratio), employing a large pilot fuel quantity, advancing the injection timing of the pilot fuel and increasing the intake temperature. It is demonstrated that, in general, any measure that tends to increase the size of the combustion regions within the overly lean cylinder charge will reduce markedly the concentrations of unburned hydrocarbons and carbon monoxide in the exhaust gases.
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