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박종남(Jongnam Park),김재호(Jaeho Kim),차경옥(Kyungok Cha) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
With the ever increasing demanded on automatic transmission, improve performance, add air<br/> conditioning, meet noise and pollution legislation the need to evaluate and improve cooling system<br/> performance at the design stage is becoming increasingly important. ATB is the abbreviation for Air-to-<br/> Boil. This is the extrapolated ambient temperature at which the coolant would boil. ATB is the measure<br/> of cooling system capability. Coolant temperature control insures durability and long engine life in<br/> vehicle users application. A numerical simulation is conducted to compare the various experimental<br/> results by the "e-NTU" method.<br/> The purpose of this paper is to suggest the matching technique of vehicle cooling system including<br/> automatic transmission by means of various experimental results and comparing with simulation results.
박종남(Jongnam Park),박상민(Sangmin Park),김현옥(Hyunok Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
Much attention and effort are being done by government for environmentally friendly vehicle development and production owing to CO2 emission regulation against warming earth and rising oil price. One of the important things is to develop more fuel efficient and equivalent or better performance vehicle in addition to the development of alternative energy vehicles in case of automotive manufacturers. While USA and Japanese automakers are focusing on the development of gasoline, automakers have been developing new technologies of diesel engine that is more efficient than gasoline engine for CO2 emission regulations and market trends. However, European automakers are releasing the outcomes of diesel hybrid key components that are developed by themselves. This paper intends to analyze and compare the overseas HEV development examples and effects and to review the appropriateness of diesel HEV development through coming technology development trends, system efficiency and performance, etc.
디젤 하이브리드 전기자동차의 엔진 정지 및 시동 기능의 개발
박종남(Jongnam Park),박진우(Jinwoo Park),박상민(Sangmin Park),임훈섭(Hunseob Lim),김현옥(Hyunok Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Hybrid Electric Vehicle (HEV) has two power sources, one is an internal combustion engine, the other one is an electric motor, and HEV is developed for reducing fuel consumption and emission. The main driving strategy of HEV is start & stop mode and boosting & regeneration mode done by electric motor. Therefore, the effect for fuel consumption by engine start & stop function should be evaluated and optimized in HEV. This paper introduces mild type Diesel HEV and evaluation results of engine start algorithm by electric motor. In addition that, this paper evaluates the contribution of fuel consumption by engine start & stop function based on test results in chassis dynamometer by FTP mode.
디젤 하이브리드 전기자동차 연비 및 차량성능에 관한 실험적 고찰
박상민(Sangmin Park),박종남(Jongnam Park),임훈섭(Hunseob Lim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Many countries intensify the emission regulation to cope with increasing environmental pollution. The need for reducing environmental pollution asks the modification of conventional vehicle technologies and auto manufacturers and institutes are trying to develop environmentally friendly vehicles. There are several types of environmentally vehicles being developed by auto manufacturers. Hybrid technology is most applicable one among them in actuality. Main power source of HEV (Hybrid Electric Vehicle) is diesel engine and assistant power source is electric motor. Electric motor has high torque characteristics at low speed, so it assists torque at low rpm range where engine has low torque. In addition that electric motor has torque boosting functionality at normal driving in case of full acceleration or uphill driving. etc. Electric power for operating electric motor is supplied by high voltage battery charged by electric motor during driving with surplus power. More fuel economy and less emission can be achieved by these driving mechanism. Ssangyong Motor Company developed diesel HEV to meet emission regulation and higher performance using hybrid technologies mentioned above. We analyze hybridization effect for fuel economy and performance, and intend to utilize the analyzed data for optimized further hybrid system development.
차량 주행 시뮬레이션을 이용한 디젤 하이브리드 차량의 엔진 제어 변수 및 운전 전략 최적화
방정환(Junghwan Bang),민경덕(Kyoungdoug Min),김현옥(Hyun-Ok Kim),박종남(Jongnam Park) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper engine response functions of performance and emission were made using a design of experiments and real engine experimental data. Using hybrid vehicle driving mode simulation (UDDS: Urban Dynamometer Driving Schedule) engine operating points were calculated. Changing the gear shift logic and engine-motor power distribution, several operating point sets were obtained. Then engine operating parameters were optimized in a specific vehicle test mode using an optimization algorithm.
Cooled EGR을 적용한 애킨슨 디젤엔진의 엔진성능 및 배기특성 해석
이동은(Dongeun Lee),곽호철(Hochul Kwak),박심수(Simsoo Park),임훈섭(Lim Hunseob),박종남(Jongnam Park) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study analyzes a diesel engine applied an atkinson cycle with a cooled EGR which is a new technology of the diesel engine to reduce emissions. A commercial 1-D simulation code was used for modeling atkinson and the cooled EGR system. BMEP(Brake Mean Effective Pressure), BSFC(Brake Specific Fuel Consumption), exhaust emission, combustion temperature and pressure were calculated as a function of a variable valve timing and EGR rate. Late intake valve close (LIVC) and the cooled EGR affect the diesel engine performance and the emission. It is analyzed that LIVC was retarded every 20 deg from ABDC 46 CA and cooled EGR rate is applied from 0 to 30%. When LIVC was retarded and cooled EGR gas put to intake chamber, BMEP and NOx were decreased but BSFC and smoke were increased.
조향계의 중간축어셈블리 형식 및 조건에 따른 조향 감성품질평가
구광모(Kwangmo Koo),이종화(Jonghwa lee),김정문(Jungmoon kim),박종남(Jongnam park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Emotional Quality Criteria of steering system in vehicle is more important and required from customer. Intermediate Shaft Assembly is not only simple design and also, easily mounting to the vehicle. Therefore, purpose of this study is to improve the product engineering of Intermediate shaft assembly by evaluated and analyzed the related quality factors with each type of Intermediate shaft. This study is verified the 5types of Intermediate shaft assembly with following items; noise, torsional stiffness, FFT analysis and emotional quality with looseness grade in bench and vehicle. The results are followings; First, vibration value is small when sti ffness is high in bench and vehicle. Especially, ball-slider type is best stiffness and quality. Second, Vibration value is small when an gle variation is small with lash. For example, Vibration value is increased with minimum lash for 23’and emotional level is evaluate d for 6+.In conclusion, to meet the emotional level for 7-, accepted lash criteria of Intermediate shaft assembly may be considered the maximum lash for 14’ under the loaded the torque for 4N.m when tested.