Exhaust Emissions from a Hybrid City Bus Fuelled by Conventional and Oxygenated Fuel

Miłosław Kozak, Piotr Lijewski and Marek Waligórski
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Miłosław Kozak: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznań, Poland
Piotr Lijewski: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznań, Poland
Marek Waligórski: Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznań, Poland

Energies, 2022, vol. 15, issue 3, 1-15

Abstract: City buses are one of the main means of public transport in cities. As they move in a limited and densely populated area and are intensively exploited, it is particularly important that they are environmentally friendly. There are many ways to reduce emissions from city buses, including the use of hybrid propulsion. Another way is to use low-emission fuels. This article presents the results of the emission tests of an 18 m articulated city bus with a serial hybrid drive fuelled comparatively by conventional diesel fuel and oxygenated fuel containing 10% v / v of triethylene glycol dimethyl ether (TEGDME). The emission tests were carried out during the actual operation of the bus on a route in Poznań (Poland) and over the SORT cycles. The obtained test results were compared also with the results obtained for a conventional bus. The reduction in emissions of some exhaust components was found when the hybrid bus was fuelled with oxygenated fuel during its actual operation on the bus route. There was a reduction in CO emissions by ~50% and NO x emissions by ~10%. Almost identical levels of PM and HC emissions and smoke opacity were observed for both fuels. In the SORT cycles, the differences in the emissions obtained for both types of fuel were small. In general, for the hybrid bus, a lower influence of oxygenated fuel on emissions was recorded than for the conventional bus.

Keywords: exhaust emissions; city bus; hybrid bus; oxygenated diesel fuel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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