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An experimental investigation on combustion and engine performance and emissions of a methane-gasoline dual-fuel optical engine
Technical Paper
2014-01-1329
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The use of methane as supplement to liquid fuel is one of the solution proposed for the reduction of the internal combustion engine pollutant emissions. Its intrinsic properties as the high knocking resistance and the low carbon content makes methane the most promising clean fuel. The dual fuel combustion mode allows improving the methane combustion acting mainly on the methane slow burning velocity and allowing lean burn combustion mode.
An experimental investigation was carried out to study the methane-gasoline dual fuel combustion. Methane was injected in combustion chamber (DI fuel) while gasoline was injected in the intake manifold (PFI fuel). The measurements were carried out in an optically accessible small single-cylinder four-stroke engine. It was equipped with the cylinder head of a commercial 250 cc motorcycles engine representative of the most popular two-wheel vehicles in Europe. UV-visible spectroscopy measurements were performed to analyze the combustion process with high spatial and temporal resolution. In particular, UV-visible spectroscopy allows detecting the chemical markers of combustion process such as the radicals OH* and CH*. The in-cylinder lambda spatial and temporal evolution was evaluated. The combustion evolution is characterized by means of a high speed cycle resolved camera. The exhaust emissions were characterized by means of gaseous analyzers. The measurements were performed under steady state conditions at different engine operating conditions.
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Di Iorio, S., Sementa, P., Vaglieco, B., and Catapano, F., "An experimental investigation on combustion and engine performance and emissions of a methane-gasoline dual-fuel optical engine," SAE Technical Paper 2014-01-1329, 2014, https://doi.org/10.4271/2014-01-1329.Also In
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