CNR Institutional Research Information System

Effect of EGR on nanoparticles at Common-Rail Diesel engines exhaust

Merola SS;Tornatore C;Vaglieco BM
2007
2007
Istituto Motori - IM - Sede Napoli
International Congress of Combustion Engines - PTNSS KONGRES 2007
Sì, ma tipo non specificato
Cracow (Poland)
EGR
Common Rail Diesel engine
Nanoparticles
ELPI
Laser induced incadescence
ELPI measurements pointed out the increasing of number concentration and size of particles with the EGR. The size distributions showed a maximum in the range of 54-91nm with negligible number of particles larger than 300 nm. For all the conditions, an increase of number concentration of particles bigger than 54 nm and a reduction of smaller ones was measured. This was due to the agglomeration effect caused by the reintroduction of particles contained in the exhaust gases into the cylinder during the EGR. LII measurements showed that at fixed engine speed and for all EGR values, the diameters of primary particles increased with engine load. Moreover smaller primary particles were formed at higher speed. With respect to EGR variation, for every condition the primary particles diameters increased due to the partial oxidation of soot recirculated in the combustion chamber ad the successive superficial growth. Taking into account the proposed results, for each engine operating condition, the best EGR value could be chosen taking into account the size distribution of the produced particles and not only the NOx-soot trade-off.
3
none
Merola S.S.; Tornatore C.; Vaglieco B.M.
273
info:eu-repo/semantics/conferenceObject
04 Contributo in convegno::04.01 Contributo in Atti di convegno
04.01 Contributo in Atti di convegno
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/54413
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