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실험계획법을 이용한 디젤 엔진 작동 변수 최적화에 대한 연구
정대봉(Daebong Jeong),방정환(Junghwan Bang),민경덕(Kyoungdoug Min) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, DOE analysis was carried out to investigate the effects of the main injection timing, pilot injection timing, quantity of pilot injection, rail pressure, EGR rate and emissions in an HSDI diesel engine, aiming to find out the optimal combination between all the abovementioned parameters. The other parameters which can affect engine operation are fixed. An operating point is 1500 rpm and 4 bar of bmep. This research was performed on a in-line 4 cylinder, 2497cc, HSDI diesel engine. A full factorial Design Of Experiments(DOE) analysis was carried out in order to find out the optimal combination between above parameters aiming to reach the lowest brake specific fuel consumption value while complying with NOx emission and smoke constraints. For finding the optimal combination between parameters, genetic algorithm was used in.
SILS 시스템 기반 직렬형 하이브리드 버스에 대한 연구
김민재(Minjae Kim),정대봉(Daebong Jeong),민경덕(Kyoungdoug Min) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Model based development which does not consider the real time characteristics usually have an interest on the model functional aspects. So, it considers the control algorithm to be performed simultaneously, or it ignores the time which is consumed when the controller operates. However, in the real model just one task can be performed in the MYCOM. Therefore the lack of time which comes from the sharing time makes some differences between the simulation and the real model. Therefore the compensation with time and money is inevitable. To solve those problems the research about sham simulation environment research was performed. In this research, it presents the Series Type Hybrid Bus Research of SILS System. In the research environment, the controller design and realization is performed at the same platform. Therefore the model reuse of controller design is connected to the reuse of the code and from the verified controller very high reliability real time series HEV BUS design and materialization could be availablee. For all this construction and performance at first hardware SILS was constructed and HOST PC to RTPC linkage was performed. HOST PC controls the total system and RTPC makes the calculation result in itself. Basically the operation environment of HOST PC and RTPC was ETAS LABCAR Operator.
직렬형 하이브리드 버스의 동력분배 제어전략에 관한 연구
김민재(Minjae Kim),정대봉(Daebong Jeong),민경덕(Kyoungdoug Min) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
One of the most widespread issues on HEV control strategy is the power distribution management from the various energy sources to the motor for achieving the best efficiency. The most standard strategy is the thermostat strategy and the power (load) follower strategy. Those strategies are focus on the efficiency of the engine operating point or the alleviation of the battery burden. The thermostat control strategy optimizes the operation of the internal combustion engine and the power follower control strategy minimizes the battery charging and discharging operations which hence reduces battery power loss and extends the battery life. In this paper we propose an improved power distribution control strategy for a series hybrid powertrain which considers the battery energy flow in a different view. The proposed power distribution control strategy has its foundation on the thermostat strategy and takes some profits from the power follower strategy. The strategy makes it possible to avoid a large current from battery to the traction motor which occurs when the required power is high. And the simulation results indicate that the control strategy proposed in this paper provides an optimal result between the energy sources; the internal combustion engine with the electric generator and the battery. The proposed strategy can be easily applied to any kind of series hybrid powertrain and the development of control strategy was achieved on the basis of AMEsim and Simulink Cosimulation platform.