Name ChoongHoon Lee
Position professor
Tel +82-2-970-6393
Fax 02-979-7032
E-mail chlee5@seoultech.ac.kr
Biography
Education:  
  Ph. D. in Mechanical Engineering, Seoul National University, 8/1996
  M.S. in Mechanical Engineering, Seoul National University, 3/1987
  B.Sc. in Mechanical Engineering, Seoul National University, 3/1985

Careers
1/1987 - 3/1993  Research Engineer Engine Engineering Department, Technical Center, Dawoo Heavy Industry
3/1989 - 3/1990  Visiting Research Engineer Light Duty Diesel Engine Design Department, ISUZU Motor Co. Ltd., Japan
6/1996 - 9/1998  Research Scientist Turbo and Power Machinery Research Center, Seoul National University
4/1997- 5/1998  Honorary Pos-doc Fellow  Engine Research Center, University of Wisconsin, Madison
5/2000 - 10/2002 Full time Lecturer Dept. of Automotive Engineering, Seoul National University of Science and Technology
10/2002 - 10/2006 Assistant Professor Dept. of Automotive Engineering, Seoul National University of Science and Technology
10/2006- 10/2011 Associate Professor Dept. of Automotive Engineering, Seoul National University of Science and Technology
10/2011-Present Professor, Dept. of Mechanical and Automotive Engineering, Seoul National University of Science and Technology
Research Areas
*Spray motion and formation
Drop breakup mechanism
Fuel spray’s penetration and dispersion
Particle size measurement technology

*Simulation on engine and vehicle’s performance using HILS
Simulation on vehicle’s performance with driving it in a specific driving pattern
Simulation on engine performance parameters according to vehicle’s driving pattern

*1-D/3-D CFD Simulation for Engine and Intake/Exhaust System
1-D simulation for intake/exhaust system of internal combustion engine
3-D simulation for fuel spray behavior in internal combustion engine
1-D/3-D Integrated CFD Simulation for Engine Performance
Teaching
Measurement Engineering
Microprocessor
Automotive Electronic Control System
Journal Papers
- A COMPARATIVE STUDY OF THE MEASUREMENT OF THE FUEL INJECTION RATE OF A DIESEL PIEZO INJECTOR WITH A SCALE AND A POSITIVE DISPLACEMENT FLOW METER, ARPN Journal of Engineering and Applied Sciences, vol.16 No.24 pp.2668~2673, 2021
- Fuel injection rate and its variation of a GDI injector operated in engine motoring conditions, Journal of Mechanical Science and Technology, vol.35 No.12 pp.5741~5751, 2021
- 디젤 엔진 연료 분사 타이밍 구간에서의 흡기 포트 스월비 1D 컴퓨터 시뮬레이션, Journal of ILASS-Korea, vol.26 No.2 pp.81~87, 2021
- 1-D SIMULATION OF THE CHARACTERISTICS OF FUEL PRESSURE PULSATIONS AND INJECTED FUEL MASS VARIATIONS CAUSED BY A HIGH-PRESSURE GDI PUMP OPERATION, ARPN Journal of Engineering and Applied Sciences, vol.16 No.9 pp.953~959, 2021
- Fuel Rail Pressure Control Characteristics of a GDI High-Pressure Fuel Pump Using a Newly Developed Experimental System Controlled with a Microcontroller, International Journal of Automotive Technology, vol.22 No.2 pp.489~497, 2021
- Fuel injection characteristic measurements under a transient injector driving condition using an injector driving algorithm, Journal of Mechanical Science and Technology, vol.34 No.9 pp.3889~3895, 2020
- 인젝터 구동 전류 패턴 변화가 솔레노이드 타입 커먼레일 인젝터 분사율 특성에 미치는 영향에 대한 컴퓨터시뮬레이션, JILASSKR, vol.24 No.3 pp.114~121, 2019
- A computer simulation of the fuel injection characteristics of a GDI injector according to the injector driving pattern, ARPN Journal of Engineering and Applied Sciences, vol.14 No.16 pp.2807~2816, 2019
- Development of a new system for measuring the swirl ratio of an engine cylinder head under an unsteady flow condition, Journal of Mechanical Science and Technology, vol.33 No.2 pp.955~965, 2019
- Entire-spray mixing characteristics over time after the start of the injection using an image-processing technique for high-speed captured images Of Cr-Di fuel sprays, ARPN Journal of Engineering and Applied Sciences, vol.14 No.3 pp.587~595, 2019
- A comparative study of the flow rate characteristics of flange-embedded averaging Pitot tube (APT) flow meters for various cross-section shapes, International Journal of Applied Engineering Research, vol.12 No.16 pp.6249~6255, 2017
- Development of a fuel injection rate measurement method for a vehicle driven with a transient driving patter, International Journal of Engineering and Technology, vol.9 No.2 pp.354~360, 2017
- Effect of nozzle orifice diameter on diesel spray tip penetration according to various spray models for CFD simulation with widely varying back pressure, International Journal of Automotive Technology, vol.18 No.2 pp.317~325, 2017
- A Study on Characteristics of Injected Fuel Pressure Waves of a Solenoid Type Diesel Common Rail Injector with Controlling Current Wave for Driving the Injector, Journal of ILASS-KOREA, vol.21 No.3 pp.155~161, 2016
- A Cumulative Injected Fuel Mass Measurement Under a Vehicle Driven Condition using Loadcells, Journal of ILASS-KOREA, vol.21 No.1 pp.1~6, 2016
- An experimental study of the driving of a solenoid type diesel common rail injector using microprocessors, International Journal of Engineering and technology, vol.8 No.5 pp.2346~2354, 2016
- A computer simulation of the effect of the inert gas volume fraction in low-caloric biogas on the performance of an engine, International Journal of Engineering and Technology, vol.7 No.5 pp.1781~1787, 2015
- Development of a new evaluating method for deciding a representative smoke emission of diesel vehicle driven with KD147 mode, INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY, vol.16 No.3 pp.379~386, 2015
- engine cylinder head under transient flow conditions, International Journal of Engineering and Technology, vol.7 No.3 pp.1134~1142, 2015
- Effect of gas temperature on flow rate characteristics of an averaging pitot tube type flow meter, JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, vol.29 pp.241~249, 2015
- Measuring the needle lift and return timing of a CRDI injector using an accelerometer, International Journal of Engineering and Technology, vol.6 No.5 pp.2482~2487, 2014
- 커먼레일 인젝터로부터 분사되는 디젤 분무의 연소실 압축비 변화에 따른 SMD 분포의 CFD 시뮬레이션, 한국액체미립화 학회지, vol.19 No.3 pp.123~129, 2014
- A Computer Simulation of a Driving Vehicle Performance using an Set of Engine Part Load Performance and a Transmission Shift Map, 한국액체미립화 학회지, vol.19 No.2 pp.64~68, 2014
- CFD simulations of diesel spray tip penetration with multiple injections and with engine compression ratios up to 100:1, FUEL, vol.111 pp.289~297, 2013
- A Study on Evaluating a Representative Smoke Value from an Inspection Vehicle Using Integration Method over a Cycle of Free-Acceleration Test Mode, JOURNAL OF ILASS-KOREA, vol.18 No.3 pp.132~139, 2013
- A comparative study on CFD simulation of spray penetration between gas jet and standard KIVA-3V spray model over a wide range of ambient gas densities, JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, vol.26 No.12 pp.4017~4025, 2012
- Characteristics of Smoke Emissions from Light Duty Diesel Vehicles Using Light Extinction Smoke Measurement Method under free Acceleration Test Mode, 한국안전학회지, vol.27 No.3 pp.1~8, 2012
- A comparative study between CFD and 0-D Simulation of Diesel Sprays with Several Fuel Injection Patterns Using Gas Jet Spray Model, 한국액체미립화 학회지, vol.17 No.2 pp.77~85, 2012
- Ceramic diesel particulate filter structure with inclined gas paths, Journal of the Korean Ceramic Society, vol.49 No.3 pp.226~230, 2012
- A comparative study of flow rate characteristics of an averaging Pitot tube type flow meter according to H parameters based on two kinds of differential pressure measured at the flow meter with varyin, JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, vol.25 No.8 pp.1961~1967, 2011
- A Study on the Fuel Injection System Simulating a Vehicle Driven with FTP-75 Mode for Cold Transition Period, 한국액체미립화 학회지, vol.16 No.2 pp.76~81, 2011
- CFD SIMULATION OF DIESEL SPRAYS OVER A WIDE RANGE OF AMBIENT GAS DENSITIES USING AN IMPROVED GAS JET SPRAY MODEL, ATOMIZATION AND SPRAYS, vol.21 No.7 pp.591~609, 2011
- Evaluating System for Fuel Injector with the Condition of a Driving Vehicle Mode Using an ECU HILS, 한국생산제조시스템학회지, vol.19 No.6 pp.812~818, 2010
- Characteristics of Flow Coefficients in an Engine Cylinder Head with a Quasi-steady Flow Condition by Continuous Variation of the Valve Lift, 한국안전학회지, vol.25 No.6 pp.22~27, 2010
- Study on Temperature Distributions in a Diesel Particulate Filter Equipped with Partitioned Electric Heaters, 한국연소학회지, vol.15 No.3 pp.67~73, 2010
- A Study on Flow Rate Characteristics of a AnnubarⓇ Type Differential Pressure Flow Meter with a Shape Improvement, 한국생산제조시스템학회지, vol.19 No.2 pp.204~210, 2010
- Effects of Pressure Tapping Conditions on Flow Rate Measurement of Triangular Separate Bar Differential Pressure Flow Meter, 한국안전학회지, vol.25 No.2 pp.1~6, 2010
Conference Papers
- 박성재, 이충훈, A comparative study on sensing a timing of start and stop of fuel injection with a Diesel solenoid injector using a photo sensor and a shock sensor, 2021 KSAE spring conference abstract, online 진행, 2021
- 오대산, 이충훈, 1D computer simulation of swirl ratio in a cylinder generated by a direct injection diesel engine intake port according to engine speed, 2021 KSAE spring conference abstract, online 진행, 2021
- 박성재, 이충훈, Fuel injection timing measurement using optical sensor, needle lift sensor and shock sensor, 2020 KSAE spring conference proceeding, 삼척, 2020
- 김재범, 이충훈, A Cumulative fuel injection mass measurement with driving gasoline injectors under vehicle driven with FTP-75 mode, 2020 KSAE spring conference proceeding, 삼척, 2020
- 오대산, 이병진, 이충훈, Measurement of Intake Port Swirl Ratio in Cylinder Head with an Engine Intake Air Flow Condition, KSAE 2019 ANNUAL SPRING CONFERENCE PROCEEDINGS, 제주 라마다 호텔, 2019
- 이충훈, A Computer Simulation on the Fuel Injection Rate Characteristics of a Common Rail Injector with the Injector Driving Current Patterns, KSAE 2019 ANNUAL SPRING CONFERENCE, 제주 라마다호텔, 2019
- 이영주, 이충훈, A Statistical characteristics of injected fuel with Bosch method of fuel injection rate measurement for a common rail injector, 2017 KSAE spring conference, 제주, 2017
- 김재범, 이충훈, A statistical analysis of a cumulative injected fuel mass measured under vehicle driving condition, 2017 KSAE spring conference, 제주, 2017
- 안정훈, 이충훈, Development of diesel piezo injector driver using a microprocessor, 2016 KSAE fall conference, 대구 EXCO, 2016
- 김길태, 이충훈, Characteristics of injected fuel pressure waves according to injector driving current, 2016 KSAE fall conference, 대구 EXCO, 2016
- 김정국, 이충훈, Development of drivers for diesel common rail pressure controller and injector using microprocessor, 2016 KSAE spring conference, 제주, 2016
- 현승훈, 안정훈, 김정기, 이충, Fuel injection timing measurement of CR-DI injector using an accelerometer, KSAE 2015 Annual Conference, 경주화백컨벤션센터, 2015
- 이충훈, A flow rate characteristics of flange embedded averaging Pitot tube (APT) flow meters which have various cross-section shapes, KSAE 2015 Annual Conference and Exhibition, 경주화백컨벤션센, 2015
- 오대산, 이충훈, Swirl ratio measurement of an engine cylinder head with continuous variation of valve lift, KSAE spring conference, 부산 벡스코, 2014
- 조성근, 유태영, 이충훈, Fuel injection rate measurement under driving the vehicle with transient mode using loadcells and ECU HILS, KSAE spring conference, 부산벡스코, 2014
- 조성근, 이충훈, 엔진 부분 부하 성능 데이터 세트를 이용한 주행 차량 성능 시뮬레이션, 2013 KSAE Annual Conference, 일산킨텍스, 2013
- 박기열, 이충훈, KD147 모드로 주행하는 디젤 차량으로부터 배출되는 매연의 대푯값 결정 방법 연구, 2013 KSAE Annuel Conference, 일산킨텍스, 2013
- 여승화, 이수룡, 이충훈, CFD Simulation for the Effect of Gas Temperature on Flow Characteristics of an Averaging Pitot Tube Flow Meter, 2013 KSAE Annual Conference, 일산킨텍스, 2013
- Choong-Hoon Lee, An Experimental Study on the Correlation between Spray Dispersion Area and Tip Penetration Using an Edge Detection Technique of Images Captured from Highly Pressurized Cr-Di Fuel Injection, Advanced Materials Research, Guangzhou, 2013
- Choong-Hoon Lee, Transient Fuel Injection Rate and Fuel Economy Prediction for a Vehicle Driven with FTP-75 Mode Using an ECU HILS, Advanced Materials Research, 1, 2013
- 이충훈, A Study on an Evaluation Method of Representative Smoke Value from Inspection Vehicle Using Integration of Smoke Emissions over a Cycle of Snap-Acceleration Test, 2012 KSAE Annual Conference Proceeding, 일산 KINTEX, 2012
- 박동선, 오대산, 기체 온도가 Annubar형 차압유량계 유량 특성에 미치는 연구, 한국자동차공학회 춘계학술대회논문집, 2010
- 오대산, A study on characteristics of flow coefficients in engine cylinder head with a quasi-steady flow condition by continuous variation of the valve lift, 한국공작기계학회 2010 춘계학술대회 논문집, 일산 KINTEX, 2010
Patents
- 관로 연결수단 일체형 평균 피토 타입 차압 유량계의 제조 방법, 특허 등록, 대한민국, 2016
- 관로 연결수단 일체형 평균 피토 타입 차압 유량계, 특허 등록, 대한민국, 2015
Projects
- 인젝터 구동 전류 패턴 변화에 따른 솔레노이드 타입 커먼레일 인젝터 분사율 특성 컴퓨터시뮬레이션, 산학협력단, 2019.03.~2020.02.
- ENTIRE-SPRAY MIXING CHARACTERISTICS OVER TIME AFTER THE START OF THE INJECTION USING AN IMAGE-PROCESSING TECHNIQUE FOR HIGH-SPEED CAPTURED IMAGES OF CR-DI FUEL SPRAYS, 산학협력단, 2018.08.~2019.07.
- development of diesel piezo injector driver using microcontrollers, 산학협력단, 2018.03.~2019.02.
- A comparative study of the flow rate characteristics of flange-embedded averaging Pitot tube (APT) flow meters for various cross-section shapes, 산학협력단, 2017.08.~2018.07.
- 넓은 범위 배압 조건에서 다양한 CFD 분무 모델에 따른 노즐 오리피스 직경이 디젤 분무선단 거리에 미치는 영향, 산학협력단, 2017.03.~2017.10.
- 로드셀을 이용한 차량주행조건에서의 누적연료분사량 측정, 산학협력단, 2015.12.~2016.11.
- 캠축 회전에 의한 밸브 리프트 변화로 유도된 과도 유동 조건에서의 엔진 실린더 헤드 유량계수 측정, 산학협력단, 2015.04.~2016.03.
- 저발열량 바이오 가스 내의 불활성 가스 체적비가 엔진 성능에 미치는 영향의 컴퓨터 시뮬레이션, 산학협력단, 2015.04.~2016.03.
- 커먼레일 인젝터로부터 분사되는 디젤 분무의 연소실 압축비 변화에 따른 SMD 분포의 CFD 시뮬레이션, 산학협력단, 2014.04.~2015.03.
- 엔진 부분 부하 성능 및 변속기 시프트맵을 이용한 차량주행성능 컴퓨터 시뮬레이션, 산학협력단, 2014.04.~2015.03.
- ECU HILS를 이용한 FTP-75모드로 주행하는 차량의 과도 연료 분사율 및 연비 예측, 산학협력단, 2013.03.~2014.02.
- 무부하 급가속 측정 사이클로 운전되는 검사 대상 디젤 차량으로부터 배출되는 매연값 적분에 의한 차량 매연 대푯값 특성 연구, 산학협력단, 2013.03.~2014.02.
- 가스제트 분무 모델을 이용한 다양한 분사 패턴의 디젤 분무에 대한 CFD 및 0-D 시뮬레이션 비교 연구, 산학협력단, 2012.05.~2013.02.
- 포트 유동 평가 및 엔진 성능 예측, 가가소엔지니어링(주), 2010.01.~2010.08.
Miscellaneous
Professional Societies & Activities:
1. Editorial Board Member of Journal of ILASS-Korea, 2000∼Present.
2. Member of Korean Society of Mechanical Engineer, 1997∼Present
3. Member of Korean Society of Automotive Engineers, 1996∼Present
4. Member of Korean Society of Safety Engineer, 2008~Present.
5. Member of Korean Society of Railway Engineer, 2008~Present
6. Member of Korean Society of Machine Tools Engineer, 2008~Present