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http://dx.doi.org/10.5307/JBE.2011.36.6.422

Performance Characteristics of Hydro-mechanical Transmission and Design Parameters for Type Selection  

Sim, Dong-Guk (Dept. of Biosystems Engineering, Seoul National University)
Kim, Kyeong-Uk (Dept. of Biosystems Engineering, Seoul National University)
Han, Jung-Soo (Dept. of Biosystems Engineering, Seoul National University)
Publication Information
Journal of Biosystems Engineering / v.36, no.6, 2011 , pp. 422-433 More about this Journal
Abstract
Market demand for hydro-mechanical transmission (HMT) for agricultural tractors has increased recently. To select a type of HMT satisfying design conditions, performance characteristics of 12 HMT types must be understood. This study was conducted to provide tractor engineers with a guideline to select the most appropriate HMT type for their design requirements. Characteristics on speed reduction ratio, power transmission efficiency, power regeneration, lock-up angular velocity, output torque ratio and torque ratio of planetary gear train axis of the 12 HMT types were investigated and presented as either formula or graphical forms. A guideline to select proper HMT type was also presented using 2 parameter: lock-up angular velocity (${\omega}_L$) and torque ratio of the planetary gear train axis. In addition, effect of gear ratio of the planetary gear train on the power transmission efficiency was investigated and a guideline to select the best gear ratio was also presented.
Keywords
Hydro-mechanical transmission(HMT); Power Split transmission; Performance characteristics;
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  • Reference
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