The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
Oct. 15, 2003
Franz Chmela, Graz, AT;
Janos Csato, Graz, AT;
Michael Glensvig, Graz, AT;
Theodor Sams, Graz, AT;
Helmut Eichlseder, Graz, AT;
Günter Figer, Graz, AT;
Christian Fuchs, St. Stefan, AT;
Gerhard Pirker, Graz, AT;
Andreas Wimmer, Graz, AT;
Franz Chmela, Graz, AT;
Janos Csato, Graz, AT;
Michael Glensvig, Graz, AT;
Theodor Sams, Graz, AT;
Helmut Eichlseder, Graz, AT;
Günter Figer, Graz, AT;
Christian Fuchs, St. Stefan, AT;
Gerhard Pirker, Graz, AT;
Andreas Wimmer, Graz, AT;
AVL List GmbH, Graz, AT;
Abstract
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° to 5° 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° crank angle before top dead center to approximately 20° crank angle after top dead center.