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:
Aug. 08, 2006
Filed:
Feb. 22, 2002
Ekkehard Pott, Gifhorn, DE;
Eric Bree, Wolfsburg, DE;
Kai Philipp, Lagesbüttel, DE;
Michael Zillmer, Sickte, DE;
Ekkehard Pott, Gifhorn, DE;
Eric Bree, Wolfsburg, DE;
Kai Philipp, Lagesbüttel, DE;
Michael Zillmer, Sickte, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Abstract
The invention relates to a method for at least temporarily increasing an exhaust gas temperature of a spark-ignition, direction injection internal combustion engine () involving at least one measure, which is executed by the engine, whereby this at least one measure consists of a spark retarding and of a multiple injection (ME). During the multiple injection (ME), at least two fuel injections into the cylinder () are carried out within an induction cycle and compression cycle of a cylinder () of the internal combustion engine (), and the latest of these injections ensues during a compression cycle of the cylinder (). The invention also relates to the utilization of the method. According to the invention, a control end of an injection angle (α) of the latest injection is at least temporarily set to between 80 and 10° before an upper ignition dead center (ZOT) when operating with multiple injection and/or an ignition angle (α) is at least temporarily set to between 10 and 45° after the upper ignition dead center (ZOT) also when operating with multiple injection. A combination of both measures enables a dramatic acceleration of the warming up of a catalytic converter () that is connected downstream from the internal combustion engine ().