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김진석(J.S.Kim),김원(W.Kim),정용호(Y.H.Chung),정순배(S.B.Chung),김영덕(Y.D.Kim),김현수(H.S.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
Power flow characteristics of a hydro-mechanical transmission system(HMT) were investigated for tracked vehicle. in steering. A HMT consisting of two hydrostatic pumpㆍ motors(HST), several planetary gear trains and steer differential gear was considered. In order to obtain the direction and magnitude of the power flow of the HMT, network theory for the general power transmission was used. Network model for the HMT in steering was developed, which consisted of shafts, nodes and transmission elements such as clutch, gear, etc. Power flow analysis procedure consists of two stages: (1) traction force analysis in steering, (2) power flow analysis in HMT. Torque and Speed of every transmission element of the HMT was determined from network analysis. Also, efficiency, mechanical and hydraulic power loss including HST, were obtained. In addition, the regenerative power flow resulting from steering can be studied in graphic display. The power flow analysis program(PCSTEER) developed in this work can be used as a useful design tool for the tracked vehicle with HMT.<br/>
임시형(S.H.Lim),정순배(S.B.Chung),이교일(G.I.Lee) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
For rigoruos analysis of lockup engaging system, the lockup clutch system model, which considered hydraulic components and lockup spring-damper clutch, was set up. The dynamic equation of lockup solenoid valve and hydraulic valve was established. The piecewise linear model of lockup spring damper was applied in the transient torque simulation. 20th-order state equations including nonlinear model of hydraulic valve were established. The simulation of lockup clutch system was carried out and compared with the experimental result on engaging the lockup clutch of automatic transmission.<br/>