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. 07, 2009
Filed:
Jun. 25, 2004
Matthias Blessing, Berglen, DE;
Harald Braun, Esslingen, DE;
Frank Keller, Ostfildern, DE;
Gerhard Koenig, Lauterstein, DE;
Christian Krueger, Stuttgart, DE;
Alois Raab, Boebingen, DE;
Matthias Blessing, Berglen, DE;
Harald Braun, Esslingen, DE;
Frank Keller, Ostfildern, DE;
Gerhard Koenig, Lauterstein, DE;
Christian Krueger, Stuttgart, DE;
Alois Raab, Boebingen, DE;
Daimler AG, Stuttgart, DE;
Abstract
A method for operating an internal combustion engine, injects fuel directly into a combustion chamber as a main injection, a postinjection and optionally also as a preinjection. An injection nozzle with a plurality of injection bores effects the preinjection and the postinjection preferably which is carried out cyclically. To minimize wetting of the combustion chamber walls, during the postinjection the partial quantities of fuel and a lift of the nozzle needle of the injection nozzle are set so that, for each partial quantity of the postinjection injected into the combustion chamber, the reach of the respective fuel jet in the combustion chamber is limited and the reach is less than the distance to a combustion chamber boundary.