Avl List Gmbh

Günter Figer

Michael Glensvig

Franz Chmela

Andreas Wimmer

Janos Csato

Theodor Sams

Gerhard Pirker

Helmut Eichlseder

Christian Fuchs

A method for operating a direct injection diesel engine which is operated in a first operating region corresponding to low to medium partial load in such a way that fuel combustion takes place at a local temperature below the temperature of NOformation and with a local air ratio above the limit value for soot formation, and where fuel injection starts in a range of between 50&#xb0; to 5&#xb0; crank angle before top dead center of the compression phase and where exhaust gas is recirculated at an exhaust gas recirculation rate of 50% to 70%. In order to achieve high efficiency in each operating region while keeping NOand particulate emissions low, in a second operating region corresponding to medium partial load, fuel injection is started in a range from approximately 2&#xb0; crank angle before top dead center to approximately 20&#xb0; crank angle after top dead center.

Method for operating a direct injection diesel engine

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Graz, Austria

Günter Figer