Experimental study on the impact of operating conditions on PCCI combustion
by C.A.J. Leermakers; C.C.M. Luijten; L.M.T. Somers; L.P.H. De Goey; B.A. Albrecht
International Journal of Vehicle Design (IJVD), Vol. 62, No. 1, 2013

Abstract: In a short-term scenario, using near-standard components and conventional fuels, PCCI combustion relies on a smart choice of operating conditions. Here, the effects of operating conditions on ignition delay, available mixing time, combustion phasing and emissions are investigated. In the PCCI regime, NO_X and smoke have been shown to be efficiently reduced with elongated mixing time. For viable PCCI combustion, one would require a Combustion Delay (CD) which is long enough to bring both NO_X and smoke levels down to acceptable values. For the completeness of combustion, the resulting unburned hydrocarbon and carbon monoxide emissions, as well as the associated fuel consumption; mixing time should, however, be as short as possible. Most parameters strongly correlate with combustion delay, independent of how this is achieved. Lastly, the best points experienced for a number of cases are given.

Online publication date: Fri, 12-Apr-2013

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