Patent · US Active

Device and method for metering a reducing agent into an exhaust gas system of a motor vehicle

US9404408B2 · kind B2 · utility

4Cited by

11References

10Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Peter Bauer · Siegburg, DE
Rainer Bentz · Sankt Wendel, DE
Hermann Ketterl · Stephansposching, DE

Key dates

Filing date	Aug 13, 2010
Grant date	Aug 2, 2016
Priority date	—
Expiry date	May 4, 2031

Classification

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

Abstract

In an internal-combustion engine exhaust gas system, a storage tank stores the reducing agent, a supply pipe connects the storage tank to a metering unit which introduces the reducing agent into the exhaust gas system. A pump mechanism within the supply pipe conveys the reducing agent. A pressure sensor detects the pressure in the supply pipe downstream of the pump, and a pressure-releasing device has a return pipe connected to the storage tank and comes off the supply pipe. A first valve system is arranged in the supply pipe. A section of the return pipe is located at a higher level than the return pipe to form a storage volume for air present in the supply pipe. A second valve system is arranged in the supply pipe to create, when the second valve system is closed, a storage volume for pressurized reducing agent by way of this pipe branch.

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