Patent · US Expired

Device for reducing the NOx content in the exhaust gas of an internal combustion engine

US6192676A · kind A · utility

20Cited by

8References

24Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Jurgen Zurbig · Burgkunstadt, DE
Reinhard Latsch · Leinfelden, DE
Winfried Dolling · Weißenbrunn, DE
Rainer Tost · Wendelstein, DE

Key dates

Filing date	Feb 25, 1999
Grant date	Feb 27, 2001
Priority date	—
Expiry date	Feb 25, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A completely self-contained device reduces the NO.sub.x content in the exhaust gas of an internal combustion engine operated with excess air. One or more reduction catalytic converters working according to the SCR principle are provided. A reducing agent control unit need not make any recourse to data present in the control unit of the internal combustion engine. Fitting and retrofitting to a vehicle is greatly simplified, particularly for vehicles that are already in use.

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