Browse Publications Technical Papers 2004-01-0932
2004-03-08

A Preliminary Study of Ignition Consistency and Heat Release Analysis for a Common-Rail Diesel Engine 2004-01-0932

Common-rail fuel systems have been recognized as an effective means to shape the heat release rate. In this paper measured cylinder pressure and fuel injection data for a common-rail diesel engine were analyzed to develop an empirical heat release rate model. A set of discrete Wiebe functions, one to describe the pilot injection combustion and the other to describe the main injection combustion, have been proposed to model the heat release data. The coefficients in the model were adjusted to match the observed heat release diagram. An expression for ignition delay for pilot injection and main injection has also been suggested for test conditions.

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