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Effects of Exhaust Gas Recirculation on Particulate Morphology from a Diesel Engine

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Abstract:

The effects of EGR operating mode on particulate morphology were investigated for a 5.79-liter diesel engine which was equipped with a turbocharged and inter-cooled air induction system, a common-rail direct fuel injection system, and an EGR system. Morphological characteristics, such as primary particle size, number concentration and aggregate particle size were investigated by a transmission electron microscope (TEM) analysis and a electrical low pressure impactor (ELPI) under engine operating conditions of 0.41 in fuel/air ratio at different exhaust gas recirculation (EGR) rate from 0～35%. The experimental results indicated that primary particle were in the range of 17.05nm～18.34nm, which increased with increased EGR rate. As EGR rate increased, aggregate particle size were measured in a narrow range from 120nm to 170nm.

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Periodical:

Advanced Materials Research (Volume 664)

Pages:

926-930

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.664.926

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Online since:

February 2013

Authors:

Wei Zhang, Xiao Dong Wang, Rui Sun, Jian Wei Sun, Wei Han

Keywords:

Diesel Engine, EGR, ELPI, Morpholoy, TEM

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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