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P1-P2 병렬형 하이브리드 시스템의 변속패턴을 고려한 백워드 시뮬레이션 방법에 대한 연구
김한솔,박성천,임원식 한국자동차공학회 2024 한국 자동차공학회논문집 Vol.32 No.4
In this study, a backward simulation method that applies the shift map of a parallel hybrid system with P1-P2 motors was designed. The torque distribution optimization algorithm between the two motors, P1 and P2, was applied, and a shift pattern comparable to the forward or actual vehicle test was implemented in the backward simulation results after considering shift hysteresis characteristics. By applying the shift map, it was confirmed that the number of shifts decreased by about 22.4 %, from 642 to 144, and unrealistically frequent shifts were prevented. Compared to the case where only the P2 motor was applied, and when the P1 motor was additionally applied, fuel efficiency slightly increased from 24.4156 km/l to 24.4311 km/l.
P1-P2 병렬형 하이브리드 시스템의 토크 분배 제어 방법에 대한 연구
김한솔,박성천,임원식 한국자동차공학회 2024 한국 자동차공학회논문집 Vol.32 No.4
In this paper, the control logic of a parallel hybrid system with a P1-P2 motor was studied. In determining engine on/off timing, the engine and motor torque distribution, the P1-P2 motor torque distribution, and the SOC management control are necessary in controlling the P1-P2 hybrid system. Backward simulation methods were then used in developing such a hybrid system control logic. Since the backward simulation method derives theoretical optimal operating points, it presents a real-time control logic configuration method that follows the backward simulation results. A rule-based control logic was constructed, and a control map was generated based on the results of the backward simulation. Next, a forward simulator was constructed to verify the control logic. Based on the fuel efficiency analysis, it was confirmed that the length of the backward simulation showed an error of within 8.18 %, compared to the previous one. It is verified that the SOC path is similar, and that the SOC management control logic converges to the intermediate SOC level, even when the analysis starts under SOC over-discharge and overcharge conditions.
차량 안정성 및 선회 성능을 고려한 휠 모터 구동 버스 시스템 제어 알고리즘 개발
정종렬(Jongryeol Jeong),최종대(Jongdae Choi),신창우(Chang Woo Shin),임원식(Wonsik Lim),차석원(Suk Won Cha) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently, many academies and vehicle companies have researched electric vehicle able to be a solution of global warming and increasing of oil price. Wheel motor drive system which do not utilizes complex transmission or differential gear is an effective vehicle system of various kinds of electric vehicle system. In wheel motor drive system, appropriate power distribution of traction motors should be conducted for the performance of cornering and safety of the vehicle. In this paper, a control algorithm based on PID control theory was developed for the traction of the vehicle. With the developed control algorithm, forward simulations were conducted using six degrees of freedom vehicle dynamics simulation program. From the simulation results, it was verified of safety and cornering performance of the vehicle. For the actual application of the control algorithm, further research, such as combining with regenerative braking algorithm or vehicle speed estimation algorithm, is on the plan.
동력 분기 하이브리드 전기 자동차의 운행 모드 시뮬레이션
안국현(Ahn, Kuk-Hyun),조성태(Cho, Sung-Tae),임원식(Lim, Won-Sik),박영일(Park, Yeong-Il),이장무(Lee, Jang-Moo) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
The power split hybrid power train is considered to be one of the most prospective configuration for the hybrid electric vehicle (HEV). Toyota Prius, representing this type of vehicle, showed outstanding performances in fuel efficiency, emission reduction and acceleration. The excellence is largely due to the fact that it utilizes almost all operation modes of HEV. Those modes include ZEV (Zero Emission Vehicle) driving, idle stop, fuel cut-off, power assist, active charging, regenerative braking and so forth. In this paper, a few of the mode operations were simulated using AVL Cruise. Also, control logics to operate the powertrain in each mode were developed. The states of powertrain components were displayed and analyzed. By controlling the three components (engine, motor and generator), it was possible to run the powertrain in several hybrid operation modes.