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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.
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.
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.
2차원 Look-up Table을 이용한 디젤하이브리드자동차용 돌극형 영구자석형 동기전동기의 토크 제어
이지명(JiMyoung Lee),박래관(RaeKwan Park),장서건(SeoGeon Chang),최경수(KyungSoo Choi),박진우(JinWoo Park),임훈섭(HunSeob Lim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, a strategy to control an interior permanent magnet synchronous motor (IPMSM) is presented for hybrid vehicles. To achieve an MTPA(Maximum Torque per Ampere) control, minimum d-q current references, generated from two-dimensional lookup table are used at the motor torque control. Since, the inputs of two-dimension look-up table are torque command and inverse flux magnitude, there is no division of motor operating resigns. The look-up table is implemented by d-q flux and torque data calculated from the motor voltages and current caused by various current vectors of inverter. Full order speed observer and redefined PWM reference are also proposed in this paper for stable torque control at the wide speed range. A prototype is constructed by using dual CPU ( TMS320VC33 and 56F805) controller and 30KVA PWM Inverter. An experiment results are presented for IPMSM installed to the Diesel hybrid vehicle.