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CSME 2018/08
Volume 39 No.4
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345-354
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Configuration Synthesis of Novel Series-Parallel Hybrid Transmission Systems with Eight-Link Ravigneaux Mechanisms
Ngoc-Tan Hoanga and Hong-Sen Yana
aDepartment of Mechanical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan
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Abstract:
Hybrid electric vehicle (HEV) has been invented and developed over the past two decades. It is the promising solution for cutting down emission and reducing pollution besides electric vehicles. Since a series hybrid vehicle needs no transmission, the transmissions of parallel and series-parallel hybrid systems are studied nowadays. This paper presents a design approach for the configuration synthesis of series-parallel hybrid transmissions with the eight-link Ravigneaux mechanisms. The synthesis process subject to the concluded design consist of 7 mechanisms with eight members and twelve joints including the combination of two planetary gear trains. Then, by using the techniques of power and clutch arrangements, new series-parallel hybrid transmissions are synthesized with 27 clutchless hybrid systems and 27 corresponding series-parallel hybrid transmissions. A new hybrid transmission is selected as an example to demonstrate the feasibility of the synthesized configurations by analyzing the working principle with operation modes and power flow paths.
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Keywords: hybrid electric vehicles, configuration synthesis, planetary gear train (PGT), Ravigneaux, eight-link mechanism.
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*Corresponding author; e-mail: hsyan@mail.ncku.edu.tw
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©
2018
CSME , ISSN 0257-9731
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