Applicability of various EGR strategies in a multi-cylinder diesel engine - Effect of combining HPL-EGR and LPL-EGR systems

Atsushi Kaneko, Yutaka Murata, Jin Kusaka, Yasuhiro Daisho, Daisuke Kawano, Hisakazu Suzuki, Hajime Ishii

Research output: Contribution to journalArticle

Abstract

The effect of combining high pressure loop (HPL-) and low pressure loop (LPL-) EGR systems on engine performance and emission characteristics were investigated using a multi-cylinder diesel engine under steady-state conditions. At low load, increasing HPL-EGR rate causes higher soot emission whereas increasing LPL-EGR rate causes higher fuel penalty. To solve this problem, combining HPL- and LPL-EGR systems at low load can reduce exhaust emissions without fuel penalty. At high load, in contrast, since pumping loss is low effect on fuel consumption, increasing LPL-EGR rate with higher boost pressure can reduce NOx and soot emissions simultaneously.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalReview of Automotive Engineering
Volume31
Issue number2
Publication statusPublished - 2010 Dec 1

ASJC Scopus subject areas

  • Automotive Engineering

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