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버추얼 엔진을 활용한 가솔린 엔진의 극한 환경조건 대응 매핑에의 적용 가능성 연구
박종일(Jongil Park),이동규(Dongkyu Lee),김규섭(Kyusup Kim) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
Product development using virtual technology is getting more important in automotive industry. In engine development, virtual methodologies are widely used in emission field such as RDE. However the application for engine calibration supported by virtual model is not commonly used so far despite of its great potential. In this study, engine calibration combining experimental dataset and virtual models were investigated to find out the potential of calibration efficiency and robustness. Two cases calibration against extreme environmental conditions such as very low temperature and high altitude were investigated to apply to mass production projects. One was turbocharger boost control open-loop calibration and the other was ignition correction calibration according to coolant and intake air temperature. In both applications, the dataset from virtual models are successfully linked to existing calibrations methodology. Promising calibration DCM could be achieved in each application. It can be shown from this study that engine calibration by virtual engine at certain surrounding condition is sufficiently beneficial in terms of time and cost. After a number of validation experiences, it can be expected that some calibration can be eventually replaced by virtual methodology and its coverage will grow gradually
[가솔린엔진부문] 스파크플러그 이온프로브를 이용한 직접분사식 가솔린엔진에서의 연소안정성에 관한 연구
박종일(Jongil Park),박기원(Kiwon Park),전광민(Kwangmin Chun) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
There arc two type of injection mode in direct injection gasoline engine. One is homogeneous mode that is used in high load operation and the other is stratified mode that is used in part load operation. In stratified operation, the AIF in the vicinity of the spark plug is the most important and has significant effects in combustion stability.<br/> In this study, the relation ship between the magnitude of ion probe signals and combustion stability in stratified operation was found by the analysis of ion probe signals using spark plug itself as an ion probe.<br/> In stratified combustion, the magnitude of ion probe signals was higher than that in the homogeneous combustion at the same condition because the pressure and temperature in stratified operation was higher that in homogeneous operation. It could be found that the magnitude of the measured ion probe signals is directly proportional to the combustion stability in stratified operation and the magnitude of ion probe signals was increased as ignition timing was advanced.<br/>