A study on flexible Dual-Fuel and flexi combustion mode engine to mitigate NO, soot and unburned emissions


In the present study, an existing commercial light-duty automotive diesel engine is modified to a flexible dual-fuel engine (FDFE). The FDFE operates with different low and high reactivity dual fuel combinations under low temperature combustion (LTC) mode using combined multipoint fuel injection and common rail direct injection systems. The FDFE can smoothly transit between LTC and conventional diesel combustion (CDC) mode. FDFE combines SI and CI benefits and stands as a potential internal combustion engine for future hybrid electric options. In this study, the modified engine was operated in flexi fuel mode with methanol/diesel, methanol/biodiesel, methanol/dimethyl ether (DME), methanol/polyoxymethylene dimethyl ether (PODE), (methanol + Isobutanol blends)/diesel and (methanol + PODE blends)/diesel in LTC strategy at a different speed and torque conditions. This approach improved the brake thermal efficiency by 8%, decreased NO and soot emissions by more than 90% compared to CDC mode. The improvement in brake thermal efficiency reduced CO2 emissions compared to CDC mode. In the FDFE engine, combustion phasing and fuel energy input are maintained as same as in CDC mode to investigate the dual-fuel effects in LTC mode over a neat diesel mode. Experimental study with energy and exergy analysis was carried out to assess the technical suitability of the FDFE as compared to the conventional diesel engine. The results proved that without relying on the after- treatment systems and fossil fuels, it is possible to reduce the NO, soot, unburnt hydrocarbon, carbon monoxide and CO2 emissions from the diesel engine, paving the way for extending the life of the diesel engine.

Publication DOI: https://doi.org/10.1016/j.fuel.2022.124276
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences > Aston Institute of Urban Technology and the Environment (ASTUTE)
College of Engineering & Physical Sciences
Additional Information: © 2022 Elsevier Ltd. This accepted manuscript version is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ The Department of Science and Technology (DST) in New Delhi, India, has funded this study through Clean Energy Research Initiative (CERI). M/s Ashok Leyland and M/s Delphi TVS, Chennai, India, also provided guidance and support to the authors. The authors would like to express their gratitude to DST and Anna University for their contribu- tions to this effort.
Uncontrolled Keywords: Combustion efficiency,CO2 mitigation,Flexible Dual Fuel Engine,Low Carbon Fuels,LTC,NOx,Soot,SDG 13 - Climate Action,SDG 7 - Affordable and Clean Energy
Publication ISSN: 1873-7153
Full Text Link:
Related URLs: https://www.sci ... 016236122011280 (Publisher URL)
PURE Output Type: Article
Published Date: 2022-08-15
Published Online Date: 2022-04-26
Accepted Date: 2022-04-16
Authors: Duraisamy, Ganesh
Rangasamy, Murugan
Hossain, Abul Kalam (ORCID Profile 0000-0002-8713-8058)



Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 26 April 2023.

License: Creative Commons Attribution Non-commercial No Derivatives

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