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:
Jul. 04, 2000
Filed:
Oct. 29, 1998
Walter Boegner, Remseck, DE;
Frank Duvinage, Kirchheim, DE;
Walter Friess, Stuttgart, DE;
Karl-Ernst Haak, Lichtenwald, DE;
Bernd Krutzsch, Denkendorf, DE;
Rudolf Maly, Sindelfingen, DE;
Viktor Pfeffer, Ostfildern, DE;
Stefan Pischinger, Aachen, DE;
Gregor Renner, Stuttgart, DE;
Dirk Voigtlaender, Krontal-Muenchingen, DE;
Michel Weibel, Stuttgart, DE;
Guenter Wenninger, Stuttgart, DE;
Friedrich Wirbeleit, Esslingen, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
A method for operating a multicylinder internal combustion engine with at least one adsorber catalytic converter in the exhaust line of the internal combustion engine includes operating the adsorber catalytic converter with periodically alternating adsorption and desorption operation. The exhaust leaving the adsorber catalytic converter in desorption operation is recycled and/or an oxidation catalytic converter is provided upstream of the adsorber catalytic converter. Exhaust recycling takes place occurs selectively in only one set of the cylinders of the internal combustion engine and this set of cylinders is operated in a state of incomplete combustion during desorption operation. Rich afterburning may be performed during desorption operation of the adsorber catalytic converter in the oxidation catalytic converter connected upstream and the oxidation catalytic converter is operated at an increased temperature during short regeneration phases to remove soot.