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연비 평가를 위한 6속 DCT기반 HEV 성능 시뮬레이터의 개발
백진주(J. J. Baek),이용관(Y. K. Lee),박진현(J. H. Park),한관수(K. S. Han),황성호(S. H. Hwang) 유공압건설기계학회 2013 드라이브·컨트롤 Vol.10 No.4
With aggravation of environmental contamination and energy resource exhaustion, Hybrid Electric Vehicles (HEV) that can be economically operated with low fuel consumption are receiving greater attention. For performance improvement of such HEV, the development of efficient transmission can be seen as one of core technologies such as performance of components and driving strategy. Dual clutch transmission (DCT) is actively studied as a transmission type for HEV due to its advantages of having excellent power transmission efficiency based on manual transmission characteristic, resolving the problem of power interruption, and realizing driving convenience of automatic transmission (AT). In this paper, one diesel HEV equipped with 6-Speed DCT, modelled using MATLAB/Simulink, and a performance simulator developed for this vehicle are introduced. Driving simulation with driving cycles such as FTP75 and NYCC was performed using the developed performance simulator, and the simulated results regarding state of charge and fuel economy, when AT and DCT are applied to this diesel hybrid vehicle respectively, are compared. This performance simulator can be utilized to develop a control algorithm for improving the fuel economy of HEV with DCT.
DEVELOPMENT OF DCT VEHICLE PERFORMANCE SIMULATOR TO EVALUATE SHIFT FORCE AND TORQUE INTERRUPTION
Park, S.J.,Ryu, W.S.,Song, J.G.,Kim, H.S.,Hwang, S.H. The Korean Society of Automotive Engineers 2006 International journal of automotive technology Vol.7 No.2
This paper presents shift characteristics of a dual clutch transmission(DCT). To obtain the shift force, dynamic models of the DCT are constructed by using MATLAB/Simulink and considering the rotational inertia of every component and the target pre-select time. Dynamic models of the shift and clutch actuators are derived based on the experimental results of the dynamic characteristics test. Based on the dynamic model of the DCT synchronizer, control actuator and vehicle model, a DCT vehicle performance simulator is developed. Using the simulator, the shift force and speed of the relevant shafts are obtained. In addition, the torque and acceleration of actuators are calculated during the shift process by considering the engaging and disengaging dynamics of the two clutches. It is observed from the performance simulator that uninterrupted torque can be transmitted by proper control of the two clutches.
백진주(J. J. Baek),박진현(J. H. Park),이용관(Y. K. Lee),황성호(S. H. Hwang) 유공압건설기계학회 2013 유공압건설기계학회 학술대회논문집 Vol.2013 No.6
Recent Energy exhaustion and environmental issues have brought growing interests in HEV(Hybrid Electric Vehicle), which offers the advantage of low fuel consumption in traffic congestion. In order to improve the performance of these Hybrid Electric Vehicles, the development of effective transmission technology is highly required. Especially many researches already have done on DCT(Dual Clutch Transmission) as the latest technology, which has the excellent power transfer efficiency. DCT solves a problem about the disconnecting problems between engine and manual gearbox and implements the driving convenience of Automatic transmission. this study has modeled a disel hybrid electric vehicle with DCT using MATLAB/Simulink. and the Performance Simulator for 6 Speed DCT-based Hybrid Electric Vehicle. In addition, in order to verify the performance simulator, this study has obtained simulation result by using the FTP72 driving mode. And the results about the diesel hybrid electric vehicle with AT and DCT have been compared SOC and fuel efficiency.
DEVELOPMENT OF DCT VEHICLE PERFORMANCE SIMULATOR TO EVALUATE SHIFT FORCE AND TORQUE INTERRUPTION
S. J. PARK,W. S. RYU,J. G. SONG,H. S. KIM,S. H. HWANG 한국자동차공학회 2006 International journal of automotive technology Vol.7 No.2
This paper presents shift characteristics of a dual clutch transmission (DCT). To obtain the shift force, dynamic models of the DCT are constructed by using MATLAB/Simulink and considering the rotational inertia of every component and the target pre-select time. Dynamic models of the shift and clutch actuators are derived based on the experimental results of the dynamic characteristics test. Based on the dynamic model of the DCT synchronizer, control actuator and vehicle model, a DCT vehicle performance simulator is developed. Using the simulator, the shift force and speed of the relevant shafts are obtained. In addition, the torque and acceleration of actuators are calculated during the shift process by considering the engaging and disengaging dynamics of the two clutches. It is observed from the performance simulator that uninterrupted torque can be transmitted by proper control of the two clutches.
Design of Self-Energizing Clutch Actuator for Dual-Clutch Transmission
Oh, Jiwon J.,Jinsung Kim,Choi, Seibum B. IEEE 2016 IEEE/ASME transactions on mechatronics Vol.21 No.2
<P>A novel dry clutch actuator for the dual-clutch transmission (DCT) using self-energizing principle is suggested. A mathematical model of the actuator and the inclusive DCT driveline is developed. The magnitude of torque amplification obtained by the self-energizing effect is studied, and it is verified via experiments by comparing the calculated and the empirical gains. Also, by analyzing the characteristics of the energy consumption in actuator motors during the vehicle launch and gear shifts, the application potential for the self-energizing clutch actuator is examined. Such work is done both through simulation and dynamometer experiments. The simulation is conducted by using the driveline and self-energizing actuator model developed by using MATLAB/Simulink. The hardware-in-the-loop experiments are conducted with the driveline dynamometer that is designed and constructed exclusively for the self-energizing clutch actuator and DCT to experimentally demonstrate the suitability of the suggested actuator for DCT.</P>
Oh, K.,Yun, S.,Ko, K.,Ha, S.,Kim, P.,Seo, J.,Yi, K. Elsevier ; Elsevier Science Pub. Co 2016 AUTOMATION IN CONSTRUCTION - Vol.69 No.-
This paper presents gear ratio and shift schedule optimization strategies to improve energy efficiency for the dynamic simulation of a wheel loader equipped with dual clutch transmission (DCT) and automated manual transmission (AMT). A conventional wheel loader uses torque converter (T/C) based automotive transmission, and the torque converter causes heavy energy loss during the V-pattern working cycle. To improve fuel economy while maintaining working performance in the V-pattern working cycle, automated manual transmission (AMT) and dual clutch transmission (DCT) have been suggested to substitute the clutch for the torque converter. In addition, the optimization strategies for the gear ratio and shift schedule for AMT and DCT have been proposed for improving fuel economy. Gear ratios have been determined by a nonlinear optimization method based on the standard V-pattern working cycle which is obtained from experimental test data by a skilled driver. Then, the gear-shift schedule for clutch-type transmission has been derived by using a determined gear ratio and optimization strategy. Simulations have been conducted to investigate working performance and energy efficiency by using three developed wheel loader simulation models equipped with T/C, AMT, and DCT, respectively, with the driver model for the V-pattern working cycle. Simulation results show that AMT- and DCT-based wheel loaders are more fuel efficient for the V-pattern working cycle than the T/C-based wheel loader.
A Study on Thermal Analytical Model for a Dry Dual Clutch
Liu, Hao,이재천,노유정,조종환,이희락,고재욱,강지우 사단법인 유공압건설기계학회 2015 드라이브·컨트롤 Vol.12 No.1
The stability of friction characteristics and thermal management for a dry type dual clutch transmission (DCT) are inferior to those of a wet clutch. Too high temperature resulting from frequent engagement of DCT speeds up degradation or serious wear of the pressure plate or burning of the clutch disk lining. Even though it is significantly important to estimate the temperature of a dry double clutch (DDC) in real-time, few meaningful study of the thermal model of DDC has been known yet. This study presented a thermal analytical model of lumped parameters for a DDC by analyzing its each component firstly. Then a series of experimental test was carried out on the test bench with a patented temperature telemetry system to validate the proposed thermal model. The thermal model, whose optimal parameter values were found by optimization algorithm, was also simulated on the experimental test conditions. The simulation results of DDC temperature show consistency with the experiment, which validates the proposed thermal model of DDC.
A Study on Thermal Analytical Model for a Dry Dual Clutch
Hao Liu(류하오),J. C. Lee(이재천),Y. J. Noh(노유정),J. H. Cho(조종환),H. R. Lee(이희락),J. E. Koh(고재욱),J. W. Kang(강지우) 유공압건설기계학회 2015 드라이브·컨트롤 Vol.12 No.1
The stability of friction characteristics and thermal management for a dry type dual clutch transmission (DCT) are inferior to those of a wet clutch. Too high temperature resulting from frequent engagement of DCT speeds up degradation or serious wear of the pressure plate or burning of the clutch disk lining. Even though it is significantly important to estimate the temperature of a dry double clutch (DDC) in real-time, few meaningful study of the thermal model of DDC has been known yet. This study presented a thermal analytical model of lumped parameters for a DDC by analyzing its each component firstly. Then a series of experimental test was carried out on the test bench with a patented temperature telemetry system to validate the proposed thermal model. The thermal model, whose optimal parameter values were found by optimization algorithm, was also simulated on the experimental test conditions. The simulation results of DDC temperature show consistency with the experiment, which validates the proposed thermal model of DDC.
Enrico Galvagno,Guido Guercioni,Giorgio Rizzoni,Mauro Velardocchia,Alessandro Vigliani 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.4
A Dynamic Programming (DP) formulation is developed to find the global optimal solution to the energy management of a parallel Plug-in Hybrid Electric Vehicle (PHEV) equipped with a Dual-Clutch Transmission (DCT). The effects of integrating in the DP formulation the losses accounting for gearshifts and engine starts are studied in terms of the overall fuel consumption; the optimal control solutions obtained depends on the occurrence of these transient events. These sources of dissipation are modeled through physical considerations thus enabling the DP algorithm to decide when it is more convenient, in terms of minimizing the total energy consumption, to perform either a gearshift or an engine start. This capability differentiates the DP formulation here presented from those presented in previous studies.