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Development of Control Strategy and Energy Management for Plug-in HEV
Chao Ma,Jian Ji(지건),Hyunsoo Kim(김현수) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Plug-in Hybrid Electric Vehicle (PHEV) is considered as the next design objective of hybrid electric vehicle (HEV). It combines the advantages of electric vehicle (EV) and HEV. PHEV has full electric drive mode which can be applied in relative short distance and HEV mode which can be used for long distance. In this paper, the powertrain model of the PHEV is obtained. Based on the analysis of the powertrain model, the control strategy and energy management strategy of PHEV are developed. The PHEV simulator is constructed MATLAB/Simulink. Using the powertrain model and the control strategies, simulations are performed and the simulation results are analyzed. Finally, the plug-in Prius simulator is validated by using the PSAT. It is expected that the PHEV performance can be used for the designers to develop a PHEV.
2 stage 금속 벨트 CVT의 변속 제어 알고리즘 개발 및 성능 해석
전영호(Youngho Jun),지건(Jian Ji),박정만(Jeongman Park),김병준(Byungjun Kim),심장선(Jangsun Sim),조서연(Seoyeon Cho),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
A shift control algorithm was proposed for a 2 stage CVT by considering the shift speed of the CVT and the planetary gear. In order to evaluate shift quality for the suggested shift control algorithm, a 2 stage CVT performance simulator was developed based on the CVT powertrain. From the simulation results, it was found that variation of the total gear ratio can be decreased in transient period. Consequently, torque variation of driveshaft was decreased, which provides improved shift quality. In addition, when the target gear ratio changed during the shift, the total gear ratio followed the target gear ratio by shift control algorithm.
2 stage CVT 가속성능 개선 변속 제어 알고리즘 개발
박정만(Jeongman Park),지건(Jian Ji),권오은(Oheun Kwon),채민재(Minjae Chai),심장선(Jangsun Sim),임광혁(Kwanghyuk Lim),조서연(Seoyeon Cho),김현수(Hyunsoo Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
In this study, a 2 stage CVT shift control algorithm is proposed for kickdown shift to improve acceleration performance. The proposed shift control algorithm controls a desired secondary pressure to increase a variator shift speed and a release clutch pressure to shift a planetary gear smoothly. In order to evaluate acceleration performance of the control algorithm, a 2 stage CVT vehicle simulator is developed based on MATLAB/Simulink and SimDriveline. It is found from the simulation results that an acceleration performance is improved in terms of an increase of variator shift speed.
병렬형 CVT 하이브리드 자동차의 ISG 성능에 관한 연구
권오은(Oheun Kwon),채민재(Minjae Chai),지건(Jian Ji),김현수(Hyunsoo Kim) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
In this study, a feasibility of reducing the ISG capacity is investigated for a parallel CVT hybrid electric vehicle(HEV). Using the CVT function, clutch speed of the motor side is decreased which provides the decreased clutch speed of the engine side. This gives a reduced ISG capacity which is required to increase the engine speed to the synchronization point. To evaluate the performance of mode change control with the reduced ISG, CVT HEV simulator is developed based on MATLAB/Simulink and SimDriveline. It is found from the simulation results that the mode change using the reduced ISG show satisfactory performance by the CVT control.
김성민(Sungmin Kim),마차오(Chao Ma),지건(Jian Ji),변성곤(Sunggon Byun),김정민(Jeongmin Kim),김현수(Hyunsoo Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this paper, motor torque distribution algorithm is proposed for an in-wheel electric vehicle, which adopts one in-line motor at front wheel and two in-wheel motors at rear wheel. A motor torque distribution map is constructed which enables the motor operation on efficient region corresponding to the driver"s demand and vehicle velocity. In addition, fuel economy of the motor torque distribution algorithm is investigated for various reduction gear ratios. It is found that the motor torque distribution algorithm provides improved fuel economy and reduction gear ratio should be selected by considering the motor and reduction gear efficiency.