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정춘화(Chunhua Zheng),박영일(Yeong-il Park),차석원(Suk Won Cha),강상욱(Sangwook kang) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Fuel cell hybrid vehicles (FCHVs) have become one of the most promising candidates for future transportation due to current energy supply problem and environmental problem. Fuel economy is the main issue in hybrid vehicles and it depends on the power management strategies. A rule-based power management strategy for an FCHV is presented in this paper. In order to evaluate the fuel economy of the rule-based strategy adequately, the initial battery state of charge (SOC) and final battery SOC have to be the same. To consider this point, the fuel economy evaluation method based on the relationship between delta SOC and delta fuel consumption and the method based on the optimal control are presented. The concepts of equivalent fuel consumption based on the two fuel economy evaluation methods are applied to this paper. The two methods are compared to each other on the rule-based power management strategy.
정춘화(Zheng, Chun-Hua),김남욱(Kim, Nam-Wook),이대흥(Lee, Dae-Heung),임원식(Lim, Won-Sik),박영일(Park, Yoeng-Il),차석원(Cha, Suk-Won) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
HEV(Hybrid Electrical Vehicle) is considered as one of the next generation vehicles. To develop the HEV, there must be a reliable simulator, by which the capacities of the power resources are tested, and the parameters of the HEV are optimized before developing the real model of the HEVs. This process can save the money for designing the HEV system and improve the system without experiments. Matlab Simulink is familiar to mechanical engineers and the program can simultaneously provide a system model and a controller in one program. Nowadays, the Simdriveline toolbox which is used for analysis a power-train system is applied to build a dynamic model for a HEV system. In this study, we make a HEV simulator with the Simdriveline toolbox and develop a controller. There are two simple strategies, applied to the controller. One strategy includes a power split ratio and a shift map which are created by user. Other strategy calculated an appropriate amount of resource's torque along specific results, and this is useful when users can't develop a fitting controller. The methodologies for configuring the simulator and its control system are presented in this paper.
정춘화(Chunhua Zheng),신창우(Changwoo Shin),김규식(Kyu-sik Kim),이봉현(Bong-hyun Lee),임원식(Wonsik Lim),강상욱(Sangwook Kang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Electric Vehicles (EVs) have become huge issues these days because of energy resource and environmental problems. EVs have many outstanding advantages such as zero emission and independence from petroleum, but more importantly, it has the ability of recovering braking energy. In this research, an EV simulation program is created to study each EV component and the controller which is including a braking algorithm.
정춘화(Chunhua Zheng),박영일(Yoeng-il Park),임원식(Wonsik Lim),차석원(Suk-won Cha) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In HEV (hybrid electric vehicle) system, two or more power sources combine their output power together which is very important to effectively distribute power during vehicle operation. Some kinds of vehicle driving control strategies based on global optimization techniques, local optimization techniques, and the intelligent control strategy have been studied. In this paper, DP (Dynamic Programming) and fuzzy theory are both introduced and applied to two shaft parallel HEV and the control results are compared.