Comparison of NOx Level and BSFC for HPL EGR and LPL EGR System of Heavy-Duty Diesel Engine Yonsei University

Format:

Conference/Event

Author/Creator:

Jun, Jong Heun, author.

Conference Name:

Asia Pacific Automotive Engineering Conference (2007-08-05 : Hollywood, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

Diesel engines are the most commonly used power plant of freight and public transportations in the world. Also, the newly developed injection system, Common Rail system, increases the demands for both light and heavy duty diesel vehicles. On the other hand, stringent emission regulations are being proposed with growing concern on NOx and PM emissions from diesel engines. Future emission regulations require advanced emission control technologies, such as EGR and SCR. 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 LPL EGR system, which is simulated on a previous study, is compared with a HPL EGR system which uses a variable geometry turbocharger (VGT). Compare to LPL EGR system, HPL EGR system requires higher BSFC penalty to satisfy the same NOx level. For HPL EGR system, pumping loss seems to be the dominant factor for higher BSFC penalty. For a better understanding, increased intake manifold temperature and pumping loss are discussed to clarify the effect of HPL and LPL EGR system on NOx level and fuel economy

Notes:

Vendor supplied data

Publisher Number:

2007-01-3451

Access Restriction:

Restricted for use by site license