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JongHeun Jun,KyoSeung Lee,SoonHo Song,KwangMin Chun 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Stringent emission regulations are being proposed with growing concern on NOx and PM emissions from diesel engines. Future emission regulations require an advanced emission control technology. Exhaust gas recirculation (EGR) is a commonly used technique to reduce NOx emission. In this paper, a model-based investigation was conducted to compare the effect of high pressure loop (HPL) EGR and low pressure loop (LPL) EGR system on NOx level and BSFC of a heavy-duty diesel engine. A WAVE model was created to simulate EURO 3 engine and each component of the engine was modeled using CATIA and WaveMesher. A previous study on a LPL EGR system is compared with a HPL EGR system using a variable geometry turbocharger (VGT). In order to clarify the effect of HPL and LPL EGR system on NOx level and fuel economy, increased intake manifold temperature and pumping loss are discussed.