Effects of premixed diethyl ether (DEE) on combustion and exhaust emissions in a HCCI-DI diesel engine |
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| Authors: | Can Cinar Özer Can Fatih Sahin H. Serdar Yucesu |
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| Affiliation: | 1. Internal Combustion Engines Laboratory, Department of Thermal Engineering, School of Mechanical Engineering, National Technical University of Athens, Zografou Campus, 9 Heroon Polytechniou Street, 15780 Athens, Greece;2. Thermodynamic & Propulsion Systems Section, Aeronautical Sciences Department, Hellenic Air Force Academy, Dekelia Air Force Base, 1010 Dekelia, Attiki, Greece;3. University of Illinois at Urbana Champaign, Department of Mechanical Science and Engineering, 1206 West Green Street, Urbana, IL 61801, USA;4. Khalifa University of Science, Technology and Research, Mechanical Engineering Department, Al Saada Street, Abu Dhabi 127788, United Arab Emirates;1. Department of Mechanical Engineering, Sakarya University, Esentepe, 54187 Sakarya, Turkey;2. Department of Automotive Engineering, Kocaeli University, Umuttepe, 41380 Kocaeli, Turkey;1. School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16844, Iran;1. Department of Mechanical Engineering, Karpagam Academy of Higher Education, Karpagam University, Coimbatore 641021, India;2. Internal Combustion Engines Laboratory, Department of Mechanical Engineering, National Institute of Technology, Rourkela 769008, India;3. Department of Electrical and Electronics Engineering, Government College of Technology, Coimbatore 641013, India |
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| Abstract: | In this study, the effects of premixed ratio of diethyl ether (DEE) on the combustion and exhaust emissions of a single-cylinder, HCCI-DI engine were investigated. The experiments were performed at the engine speed of 2200 rpm and 19 N m operating conditions. The amount of the premixed DEE was controlled by a programmable electronic control unit (ECU) and the DEE injection was conducted into the intake air charge using low pressure injector. The premixed fuel ratio (PFR) of DEE was changed from 0% to 40% and results were compared to neat diesel operation. The percentages of premixed fuel were calculated from the energy ratio of premixed DEE fuel to total energy rate of the fuels. The experimental results show that single stage ignition was found with the addition of premixed DEE fuel. Increasing and phasing in-cylinder pressure and heat release were observed in the premixed stage of the combustion. Lower diffusion combustion was also occurred. Cycle-to cycle variations were very small with diesel fuel and 10% DEE premixed fuel ratio. Audible knocking occurred with 40% DEE premixed fuel ratio. NOx-soot trade-off characteristics were changed and improvements were found simultaneously. NOx and soot emissions decreased up to 19.4% and 76.1%, respectively, while exhaust gas temperature decreased by 23.8%. On the other hand, CO and HC emissions increased. |
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