A study on the effects of engine parameters on in-cylinder soot processes in a simulated direct injection Diesel engine via the two-color method (Contributo in atti di convegno)

Type
Label
  • A study on the effects of engine parameters on in-cylinder soot processes in a simulated direct injection Diesel engine via the two-color method (Contributo in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Valentino G. 1, Iannuzzi S. 1, Esposito Corcione F. 1, Minagawa T. 2, Kamimoto T. 3 (2009)
    A study on the effects of engine parameters on in-cylinder soot processes in a simulated direct injection Diesel engine via the two-color method
    in 9th Congress on Engine Combustion Processes, München (Germany)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Valentino G. 1, Iannuzzi S. 1, Esposito Corcione F. 1, Minagawa T. 2, Kamimoto T. 3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • pp. 33-44 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Two-color pyrometry technique is applied to investigate the soot evolution in an optically accessible swirl chamber of a two-stroke cycle engine which simulates combustion events in direct injection diesel engines. Tests are performed at an engine speed of 500 rpm using a common rail injector having a micro-sac 5-hole nozzle, 0.13 mm diameter and 150° spray angle. The optical holder, used to detect the flame radiation, is attached to the side wall of the combustion chamber, which has a diameter of 50 mm, to measure flame temperature and KL factor that presents soot concentration on the real time basis. The effects of engine parameters, such as EGR rate, fuel injection pressure and injection timing, on soot formation and oxidation processes, are investigated. Regarding the effect of EGR rate, it is revealed that O2 concentration in the intake charge hardly affects both formation and oxidation rates, but the decrease in O2 concentration delays the timing for the soot process to switch from formation to oxidation. The mechanism of this phenomenon is discussed referring to a CFD modeling which includes soot reaction sub-models. On the effect of injection pressure, it is found that both soot formation and oxidation rates increase with the increased injection pressure, if injection amount is fixed. Further, KL factor at a later crank angle in the expansion stroke is found to well correlate to engine-out soot emissions. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Istituto Motori, CNR, Napoli, Italy; 2) Tsukasa Sokken Co., Ltd, Tokyo, Japan; 3) Institute of Technologists, Saitama, Japan. (literal)
Titolo
  • A study on the effects of engine parameters on in-cylinder soot processes in a simulated direct injection Diesel engine via the two-color method (literal)
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