Method for regenerating a nitrogen oxide storage catalytic converter and a device for this purpose

US9382827B2 · kind B2 · utility

Assignee

• FEV Group GmbH · DE

Inventors

• Christopher Severin · Braunschweig, DE
• Thomas Wittka · Hachenburg, DE

Key dates

• Filing date: Sep 20, 2013
• Grant date: Jul 5, 2016
• Expiry date: Sep 20, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Methods for regenerating a nitrogen oxide storage catalytic converter which is monitored to ensure that it exhibits a sufficient operating temperature for its regeneration, and a regeneration occurs at a point in time in which a flow rate (v) of an exhaust flow through the nitrogen oxide storage catalytic converter (6) has at least decreased in comparison to an immediately preceding time period. A vehicle for the operation in different operating ranges, having an exhaust post-treatment, exhibiting at least one nitrogen oxide storage catalytic converter and a reformer that provides for a reformate injection in an exhaust system prior to the nitrogen oxide storage catalytic converter, and having a stored regeneration program for the nitrogen oxide storage catalytic converter, which provides for a triggering of the regeneration when an operational state is detected in which no load is demanded of the internal combustion engine, preferably when the motor is at rest.