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Configuration design of ten-speed automatic transmissions with twelve-link three-DOF Lepelletier gear mechanism

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Abstract

Many Lepelletier-type automatic transmissions are in production. Some of Lepelletier related configurations are still far from reaching maximum possible sequential speed ratios. This work focuses on analyzing and developing twelve-link three-DOF Lepelletier-type automatic transmissions to attain maximum speed ratios. Following the general trend of increased shift stages and a wider range of speed ratios, new ten-speed automatic transmissions are enumerated from the twelve-link three-DOF Lepelletier gear mechanisms. Furthermore, a ten-speed automatic transmission is modified from an existing eight-speed Lepelletier-type automatic transmission. The results show that the twelve-link three-DOF Lepelletier gear mechanism could reach eleven forward speeds at most. Nomographs are shown to be practical in detecting possible configurations and their clutching sequences.

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Correspondence to Essam L. Esmail.

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Essam Lauibi Esmail received the B.S. and M.S. from the Department of Mechanical Engineering, Baghdad University, Baghdad, Iraq, in 1980 and 1985, respectively. His Ph.D. in Mechanical Engineering is from the University of Technology in 2009. He is currently an assistant professor in the Department of Mechanical Engineering, University of Qadisiyah. His research interests include mechanisms, machine theory, design methodology, automotive engineering, hybrid transmissions, robot manipulators, fuzzy logic control, and genetic algorithm optimization.

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Esmail, E.L. Configuration design of ten-speed automatic transmissions with twelve-link three-DOF Lepelletier gear mechanism. J Mech Sci Technol 30, 211–220 (2016). https://doi.org/10.1007/s12206-015-1225-4

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  • DOI: https://doi.org/10.1007/s12206-015-1225-4

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