Patent · US Active

Method for operating an exhaust gas purification system connected to an internal combustion engine of a motor-vehicle comprising an SCR catalyst

US10100696B2 · kind B2 · utility

0Cited by

3References

6Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Uwe Gaertner · Winnenden, DE
Alexander Massner · Eßlingen, DE
Erik Rechtlich · Stuttgart, DE
Frank Zimmermann · Stuttgart, DE

Key dates

Filing date	Feb 13, 2015
Grant date	Oct 16, 2018
Priority date	—
Expiry date	Aug 29, 2035

Classification

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

Abstract

A method for operating an exhaust gas purification system connected to an internal combustion engine of a motor vehicle is disclosed. The purification system includes an SCR catalyst for catalyzed reaction of nitrogen oxides contained in the exhaust gas of the internal combustion engine with ammonia. The method includes adding a reducing agent containing ammonia to the exhaust gas upstream of the SCR catalyst at a predeterminable dosage rate and determining a pressure value correlating with an absolute pressure in the exhaust gas purification system on the input side of the SCR catalyst. The dosage rate is specified at least as a function of the pressure value.

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