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International Journal of Automotive Technology > Volume 8(6); 2007 > Article
International Journal of Automotive Technology 2007;8(6): 771-780.
ANALYSIS OF PLANETARY GEAR HYBRID POWERTRAIN SYSTEM PART 1: INPUT SPLIT SYSTEM
H. YANG1, S. CHO2, N. KIM1, W. LIM3, S. CHA1
1Seoul National University
2Hyundai & Kia Motor Company
3Seoul National University of Technology
ABSTRACT
In recent studies, various types of multi mode electric variable transmissions of hybrid electric{{br}}vehicles have been proposed. Multi mode electric variable transmission consists of two or more different types of planetary gear hybrid powertrain system (PGHP), which can change its power flow type by means of clutches for improving transmission efficiencies. Generally, the power flows can be classified into three different types such as input split, output split and compound split. In this study, we analyzed power transmission characteristics of the possible six input split systems, and found the suitable system for single or multi mode hybrid powertrain. The input split system used in PRIUS is identified as a best system for single mode, and moreover we identified some suitable systems for dual mode.
Key Words: Transmission efficiency, Hybrid electric vehicle, Planetary gear, input split
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