Patent · US Active

Procedure for the regeneration of a particle filter and for the desulphurization of an NOx storage catalytic converter

US7971429B2 · kind B2 · utility

1Cited by

0References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Stefan Forthmann · Ludwigsburg, DE
Frank Schweizer · Winnipeg, CA
Stefan Scherer · Büttelborn, DE

Key dates

Filing date	Jul 12, 2007
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Mar 2, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N9/002
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The disclosure concerns a procedure for the regeneration of a particle filter and the desulfurization of a NOx storage catalytic converter in an exhaust gas aftertreatment system of an internal combustion engine. The disclosed procedure allows for the necessary heating energy and fuel consumption required to completely or partially regenerating the particle filter to be significantly reduced. Furthermore, an increase in efficiency of the NOx storage catalytic converter results, because the process reduces the average sulfur absorption on account of a greater frequency of desulfurization phases. In so doing, the NOx emissions after the NOx storage catalytic converter can further be reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.