Title: Soot particle size and pollutant emissions characterization from a LD diesel engine equipped with high pressure and low pressure EGR system and operated with conventional and PCCI combustion

Authors: Carlo Beatrice; Chiara Guido; Nicola Del Giacomo; Silvana Di Iorio

Addresses: Istituto Motori CNR, Viale Marconi, 4, 80125 Naples, Italy ' Istituto Motori CNR, Viale Marconi, 4, 80125 Naples, Italy ' Istituto Motori CNR, Viale Marconi, 4, 80125 Naples, Italy ' Istituto Motori CNR, Viale Marconi, 4, 80125 Naples, Italy

Abstract: The paper analyses the soot Particle Size Distribution Function (PSDF) measurements carried out at the exhaust of a modern automotive diesel engine equipped with a low-pressure Exhaust Gas Recirculation (EGR) system and operating with conventional and Premixed Charge Compression Ignition (PCCI). The results have indicated significant benefits in terms of exhaust raw particle number emission with the adoption of low-pressure EGR system and PCCI calibration and, thanks to the peculiarity of the operating mode of Low Pressure EGR (LPEGR) system, have highlighted the complex link between in-cylinder charge composition and the PSDF characteristics.

Keywords: diesel exhaust emissions; particle size distribution; pollutant emissions; LPEGR; low-pressure EGR; exhaust gas recirculation; diesel combustion; premixed charge compression ignition; air pollution; soot particles.

DOI: 10.1504/IJVD.2012.047755

International Journal of Vehicle Design, 2012 Vol.59 No.1, pp.82 - 103

Received: 20 Oct 2010
Accepted: 19 Jun 2011
Published online: 23 Apr 2013 *

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