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:
Nov. 07, 2000
Filed:
Jul. 16, 1998
Steffen Digeser, Fellbach, DE;
Frank Duvinage, Kirchheim, DE;
Walter Friess, Stuttgart, DE;
Alexander Funk, Weinstadt-Endersbach, DE;
Anton Kerckhoff, Stuttgart, DE;
Bernd Krutzsch, Denkendorf, DE;
Detlef Scharr, Waiblingen, DE;
Michel Weibl, Stuttgart, DE;
Guenter Wenninger, Stuttgart, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
A multi-cylinder air-compressing injection-type internal-combustion engine having a nitric oxide adsorber catalyst and an exhaust gas return device. In order to increase the hydrocarbon fraction in the exhaust gas in front of an exhaust gas aftertreatment device during a regeneration phase and to reduce the oxygen content, exhaust gas pipes of the cylinders are divided into at least two flows, which extend separately from one another at least along a distance. An increased hydrocarbon emission is generated exclusively in the cylinders of one of the flows at times. Another of the flows is connected by way of the exhaust gas return device with an air intake pipe of the internal-combustion engine.