Effect of injection parameters on the combustion and emission characteristics in a common-rail direct injection diesel engine fueled with waste cooking oil biodiesel |
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| Affiliation: | 1. Department of Mechanical Engineering, Faculty of Engineering, Hakkari University, Hakkari 30000, Turkey;2. Department of Mechanical Engineering, Faculty of Technology, Marmara University, Istanbul 34722, Turkey;1. Korea Advanced Institute of Science and Technology, Republic of Korea;2. Hyundai Heavy Industry, Republic of Korea;3. Ulsan College, Republic of Korea;4. Hyundai Motor Company, Republic of Korea;1. Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Singapore;2. Department of Mechanical Engineering, Faculty of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;1. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Republic of Korea;2. Ulsan College, Republic of Korea;3. Hyundai Motors Co., Republic of Korea |
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| Abstract: | The objective of this paper was to study the effects of the injection pressure and injection timing on the combustion and emission characteristics in a single-cylinder common-rail direct injection (CRDI) diesel engine fueled with waste cooking oil (WCO) biodiesel and commercial diesel fuel. The fuel property including fatty acid composition for the biodiesel were measured and compared with those of the conventional diesel fuel. The engine tests were conducted at two injection pressures (80 and 160 MPa) and different injection timings from ?25 to 0 crank angle degree (CAD) after top dead center (aTDC) under two different engine loads. The results showed that the indicated specific fuel consumption (ISFC) with respect to the injection timings of the biodiesel was higher than that of the diesel fuel under all experimental conditions. The peak cylinder pressure and the peak heat release rate of the biodiesel were slightly lower, while the ignition delay was slightly longer under all operating conditions. In terms of emissions, the biodiesel had benefits in reduction of smoke, carbon monoxide (CO), hydrocarbon (HC) emissions especially with high fuel injection pressure. The nitrogen oxide (NOx) emissions of the biodiesel were relatively higher than those of the diesel under all experimental conditions. |
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| Keywords: | Waste cooking oil Biodiesel Fatty acid Combustion Emission |
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