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Power Transmission Characteristics of a Hydro-Mechanical Transmission
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 Title & Authors
Power Transmission Characteristics of a Hydro-Mechanical Transmission
Seong, Deok-Hwan; Kim, Hyeong-Ui; Lee, Geun-Ho; Kim, Hyeon-Su;
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In this paper, power flow characteristics of a hydromechanical transmission(HMT) are investigated using network analysis. The HMT used in this study consist of a hydrostatic unit(HSU), planetary gear sets, clutches and brakes providing forward 4 speeds and backward 2 speeds. Since the HMT power flows showing a closed loop and the HSU efficiency varies depending on the pressure and speed, a systematic approach is required to analyze the power transmission characteristics of the HMT. In order to analyze the closed loop power flow and the HSU power loss which changes depending on the pressure and speed, network model is constructed fur each speed range. In addition, an algorithm is proposed to calculate an accurate HSU loss corresponding to the experimental results. It is found from the network analysis that the torque and speed of each transmission element including the HSU can be obtained as well as direction of the power flow by the proposed algorithm. It is expected that the network analysis can be used in the design of relatively complicated transmission system such as HMT.
Network Analysis;HMT;Hydrostatic Unit;
 Cited by
HSU의 유량손실을 고려한 정유압 기계식 변속기의 동력특성 해석,성덕환;이근호;김형의;김현수;

대한기계학회논문집A, 2002. vol.26. 6, pp.1149-1158 crossref(new window)
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