Friction loss reduction by new lighter valve train system |
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| Institution: | 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. Department of Mechanical Engineering, Universidade Federal do Rio de Janeiro - Campus Macaé, Brazil;2. Center for Nonlinear Mechanics, COPPE, Department of Mechanical Engineering, Universidade Federal do Rio de Janeiro, Brazil;3. Programa de Pós-graduação em Engenharia Mecânica e Tecnologia de Materiais, CEFET/RJ, Brazil;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: | An aluminum tappet, an aluminum spring retainer, and a thin sintered adjusting shim were developed to produce a lighter valve train. By utilizing these parts, valve train inertia mass was reduced by 28%. Moreover, cam profile and valve spring specifications were redesigned fully to employ the reduced inertia mass for a reduced friction loss. The overall friction loss was reduced by 40%, and this friction loss was achieved in the roller rocker arm system. |
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