Patent · US Active

Method for operating a particulate filter situated in the exhaust gas area of an internal combustion engine and device for carrying out the method

US7640729B2 · kind B2 · utility

4Cited by

9References

13Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Manfred Dürnholz · Oberstenfeld, DE
Carsten Becker · Weingarten, DE
Markus Hernier · Gerlingen, DE

Key dates

Filing date	Sep 26, 2005
Grant date	Jan 5, 2010
Priority date	—
Expiry date	Oct 29, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for operating a particulate filter situated in an exhaust gas area of an internal combustion engine and a device for carrying out the method are described. A measure of the particulate matter burn-off rate is detected for influencing and/or monitoring the particulate matter burn-off rate or for influencing and/or monitoring the particulate filter temperature. A secondary air flow supplied by a secondary air pump is blown into the exhaust gas area upstream from the particulate filter. The secondary air flow is determined as a function of the detected measure of the particulate matter burn-off rate. If necessary, the secondary air flow may be enriched by an oxygen flow or nitrogen flow supplied by an air separation unit. The method prevents the particulate filter from being damaged by an unacceptably high particulate matter burn-off rate or an unacceptably high particulate filter temperature.

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