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:
Sep. 21, 2010
Filed:
May. 06, 2004
Gerhard Friedrich, Illingen, DE;
Grigorios Kolios, Lörrach, DE;
Volker Schmeisser, Stuttgart, DE;
Ute Tuttlies, Ostfildern, DE;
Frank Opferkuch, Unterensingen, DE;
Gerhart Eigenberger, Neustadt, DE;
Gerhard Friedrich, Illingen, DE;
Grigorios Kolios, Lörrach, DE;
Volker Schmeisser, Stuttgart, DE;
Ute Tuttlies, Ostfildern, DE;
Frank Opferkuch, Unterensingen, DE;
Gerhart Eigenberger, Neustadt, DE;
Univeritaet Stuttgart, Stuttgart, DE;
Abstract
In a method for purifying exhaust gases in particular from lean-burn internal combustion engines having an exhaust-gas converter with a heat exchanger and catalysts arranged in inflow and/or outflow passages, the heat exchanger exhaust gas which flows in is heated by heat exchange with exhaust gas which flows. The incoming exhaust gas enters the inflow passages without encountering any obstacle susceptible to blockages, and flows through the inflow passages to a diversion region. Heat is fed to the exhaust gas by means of a burner. The burner is operated with fuel, air and engine exhaust gas in such a way that it supplies either an oxidizing or a reducing exhaust gas. Burner exhaust gas is admixed to the gas which emerges from the inflow passages and, together with this gas, enters the outflow passages, where nitrogen oxides are removed from it by a deNOxing catalyst present in the outflow passages.