Influence of mixture preparation on HC emission of SI engine with high swirl ratio under cold conditions |
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| Institution: | 1. Technical Research Center (Yokohama), Mazda Motor Co., 2–5, Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa, 221 Japan;2. Hitachi Research Laboratory, Hitachi, Ltd., 2520, Takaba, Hitachinaka-shi, Ibaraki, 312 Japan;1. Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque NM 87131, United States;2. TEAM Technologies, 1400 Eubank SE, Albuquerque NM 87112, United States;1. Dept. Applied Quantum Phys. Nucl. Eng., Kyushu Univ., 744 Motooka, Fukuoka, 819-0395, Japan;2. Dept. Advanced Energy Eng. Sci., Kyushu Univ., 6-1 Kasugakouen, Kasuga city, Fukuoka, 816-0811, Japan;3. Dept. Electrical and Electronic Eng., Kindai Univ., 3-4-1 Kowakae, HigashiOsaka city, Osaka, 577-0818, Japan;4. Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki, 311-1393, Japan;5. National Institutes for Quantum and Radiological Sci. Tech., Rokkasho, Aomori, 039-3212, Japan;1. Dipartimento di Medicina Clinica, Università Sapienza, Roma, Italy;2. Université Paul Sabatier-CNRS (CIRIMAT), Toulouse, France;3. Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Bologna, Italy;4. Institute of Translational Pharmacology, CNR, 00133 Roma, Italy;5. San Gallicano Dermatologic Institute, IRCCS, Roma, Italy;6. Università di Milano and INFN, Lab. Radiochimica-LASA, Segrate (Mi), Italy;7. Fondazione Università G. D’Annunzio-Ce.S.I., Chieti, Italy |
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| Abstract: | This study investigates the effects of injection timing and fuel atomization on engine-out HC emission of an Sl engine with a high swirl ratio under cold conditions. To study the air-fuel mixture formation process inside the intake port and cylinder, laser visualization techniques were applied and their results were compared with the measured HC emission. Although the performance test indicated that the HC emission deteriorated in the case of one-intake-port operation, the HC emission was recovered by fuel atomization by an air-assisted injector and backflow from the cylinder into the intake port at the beginning of the intake stroke. |
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