Patent · US Active

Method for operating an SCR dosing unit and motor vehicle having a dosing unit

US9322314B2 · kind B2 · utility

3Cited by

1References

9Claims

0Family size

Assignee

EMITEC Gesellschaft fuer Emissionstechnologie mbH · DE

Inventors

Jan Hodgson · Troisdorf, DE
Sven Schepers · Troisdorf, DE
Peter Hirth · Rösrath, DE

Key dates

Filing date	Oct 15, 2013
Grant date	Apr 26, 2016
Priority date	—
Expiry date	Oct 15, 2033

Classification

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

Abstract

A method for operating a dosing unit for dosing reducing agent into an exhaust gas treatment device for purifying the exhaust gases of an internal combustion engine, includes providing the dosing unit with at least one delivery pump, at least one injector and a line section for conducting reducing agent from the delivery pump to the injector. The dosing unit is first operated for dosing reducing agent into the exhaust gas treatment device. Then, the dosing unit is shut off. Subsequently, a first pressure is maintained in the line section for at least a first time period, with the first pressure exceeding atmospheric pressure. A motor vehicle having the dosing unit is also provided.

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