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하이브리드 자동차의 모드 변환 엔진클러치 과도상태 분석과 토크 제어에 관한 연구
황현수(Hyunsoo Hwang),김상우(Sangwoo Kim),양동호(Dongho Yang),홍정호(Jungho Hong),김현수(Hyunsoo Kim),황성호(Sungho Hwang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
2-shaft parallel hybrid electric vehicle(HEV) drive train changes driving mode electric vehicle(EV) mode to HEV mode with a engine clutch. There is a torque variation that causes a driver discomfort. In this paper, Cosimulation environment that is HEV drive train modeled with AMESim in detail to describe a torque variation, and controller developed with MATLAB/Simulink is developed. To reduce discomfortable torque variation, Engine torque strategy before engine clutch engaged, and motor torque strategy after driving mode is changed, and the strategy using engine and motor torque strategy are proposed.
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(1)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The demand of the green car such as hybrid electric vehicle, fuel cell electric vehicle and pure electric eehicle has been rising dramatically. The key part is the regenerative braking system in the energy saving technology of gren car. And electronic braking system has been developed along with the advance of the electronic control technology. The reliability about the electronic braking system is very important because it is concerned with the safety of vehicle. But the regulation of the reliability assessment test for the regenerative braking and electronic braking system is not sufficient enough. In this paper, FCEV with regenerative braking system and electronic braking system(EWB, EMB) has been modeled to develop the reliability assessment technology. With a lot of ABS brake regulations and FMEA results about the regenerative braking system and electronic braking system, the reliability assessment scenarios have been developed. This scenarios have been applied to the performance simulation and it is shown effective to evaluate the reliability of green car regenerative braking with electronic braking system.
전자 브레이크를 적용한 연료전지자동차 회생제동 시스템의 신뢰성 평가기술 개발 PART-(2)
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),양동호(Dongho Yang),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The demand of the green car like hybrid electric vehicle, fuel cell electric vehicle(FCEV) and pure electric vehicle have risen dramatically. The key technology is the regenerative braking in the energy saving technology. And electronic brake has been developed along with the advance of the electronic control technology. The reliability about the braking system is very important because the braking system is concerned with safety of vehicle. But the regulation is not sufficient enough. In this study, to develop the reliability assessment technology FCEV model with regenerative braking system and electronic braking system(EWB, EMB) was developed. The reliability assessment scenarios about regenerative braking system and electronic braking system is developed using ABS brake regulations and FMEA results. This scenarios ware applied to the performance simulation of the FCEV with the regenerative braking and the electronic braking system. And the fail-safe control strategy of a EMB was suggested and verified.
회생제동 및 EWB/EMB 시스템 신뢰성 평가용 Test Bench 개발
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),최정훈(Junghoon Choi),황성호(Sungho Hwang),박희람(Heeram Park),최세범(Seibum Choi) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The key technology which can enlarge the energy efficiency in green cars such as hybrid electric vehicle, fuel cell electric vehicle and pure electric vehicle is the regenerative braking. Electronic brake systems which can be easily controlled with the regenerative brake system have been developed along with the advance of the electronic control technology. The reliability of the electronic braking system is very important because the braking system is concerned with the safety of vehicle directly and the functional safety of the electronic braking system is becoming the important issue due to the ISO 26262. But the test standard is not sufficient yet, so the researches to make a new test standard regarding to the electronic brake system and regenerative braking system are increasing. The design of test bench to test reliability and performance of electronic brake system as well as regenerative brake system was proposed in this study.
Proving Ground를 이용한 EDTS(Eco-Driving Tutoring System) 성능 평가 기술 개발
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Eco-driving is an environment-friendly driving manner which improves fuel economy. Since Eco-driving has an immediate and significant effect on improving vehicle’s fuel economy, introduction of EDTS(eco-driving tutoring system), that the main functions are measuring vehicle state and driver maneuvering data, recording driving patterns, and tutoring drivers to improve a fuel efficiency, is being promoted to support Eco-driving. However, fuel economy improvement rates by Eco-driving shown uneven distribution because many factors such as the weather, road and traffic conditions, types of vehicles and drivers’ individualities(human factors) have influence on fuel economy. In this research, test course and scenarios for evaluating the performance of EDTS on a proving ground(PG) were developed and were verified in vehicle tests and a simulation using a CarSim S/W. As a result, the proposed PG test course and scenarios are shown effective to evaluate the EDTS.
배터리 교환식 전기 버스용 휠 모터 구동 시스템의 해석 모델 개발
전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),김덕진(Deokjin Kim),이춘범(Chunbeom Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The city buses with diesel engines are the significant air pollution source in a big downtown. There are a lot of efforts to replace the city bus driven by diesel engine with the clean bus driven by CNG(Compressed natural gas) or alternative energies like an electric power. In this study, the analysis model about a exchangeable battery electric bus driven by wheel-motor system was developed. And an electric energy capacity required by electric bus was examined. The developed analysis model will be effective to discuss the durability and the reliability about fault affects.
MIL 시뮬레이터를 이용한 6속 AT 기반 2축 병렬형 하이브리드 자동차의 과도상태 해석
김상우(Sangwoo Kim),황현수(Hyunsoo Hwang),김정민(Jeongmin Kim),홍정호(Jeongho Hong),김현수(Hyunsoo Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Model in the loop(MIL) simulator is developed for a 6 speed AT based 2-shaft parallel hybrid electric vehicle(HEV) to investigate the transient characteristics such as mode change, tip-in and tip-out etc. First, powertrain model of the HEV is constructed using AMESim and control algorithm of the HCU is developed based on MATLAB Simulink. Using the AMESim simulator and MATLAB based HCU, MIL simulator is developed. It is found from the MIL simulation results that the transient characteristics such as driveshaft torque, engine and motor torque, clutch engagement state can be effectively evaluated.
파라미터 변화에 따른 전자 브레이크 시스템의 민감도에 대한 연구
박희람(Heeram Park),최세범(Seibum Choi),최성진(Sungjin Choi),전광기(Kwanki Jeon),황현수(Hyunsoo Hwang) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper is focused on the output sensitivity of electronic brake system due to the parameter variation. The mathematical models of electro-mechanical brake system and electronic wedge brake system are introduced. Using MATLAB Simulink, the performance change of each system caused by parameter variation are verified.
회생제동 시스템 신뢰성 평가를 위한 연료전지 차량 시뮬레이션 환경 구축
양동호(Dongho Yang),조배균(Baekyun Cho),전광기(Kwangki Jeon),황현수(Hyunsoo Hwang),최성진(Sungjin Choi),황성호(Sung-Ho Hwang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently, the hydrogen as a fuel to produce electricity in fuel cells actively study progresses, eco-friendly high-efficiency fuel cell electric vehicle for vehicle research has also been active in several areas. In particular, many studies to improve the efficiency of the vehicle is underway, in which regenerative braking technology of electric vehicles, energy storage devices such as fuel cell vehicles have the fuel efficiency of vehicles as key areas for improvement have been studied. According to the development of regenerative braking technology, Brake-By-Wire technology is also being developed, because regenerative braking deficiencies should be rewarded with a physical break to include hydraulic brake systems are limited. Unlike hydronic brake, electronic brake systems is controlled by electronic signals, such as Fail-Safe to verify the stability and reliability are required to develop assessment techniques. In this paper, we made the fuel cell vehicle simulation model using Co-simulation MATLAB/Simulink and CarSim, and build the SIL(Software-In-the-Loop) Simulation and the regenerative braking system reliability evaluation environment based characteristic map of sensor in vehicle in order to evaluate the reliability of regenerative braking control logic.
홍명철(Myungchul Hong),이흥규(Heungkyu Lee),이륙(Ryuk Lee),황현수(Hyunsoo Hwang),김태준,김홍민(Hongmin Kim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Although oil pump is essential part to produces oil flow to the transmission components, over-design of the oil pump causes power loss in automatic transmission. By using optimized oil pump displacement with 2 pump system which has mechanical oil pump and electric oil pump can reduce power loss of automatic transmission. This paper introduces development process of 2 pump system and proposes how to increase the transmission efficiency with 2pump system in automatic transmission.