Patent · US Active

Method for operating a delivery unit for a reducing agent and motor vehicle having a delivery unit

US9140165B2 · kind B2 · utility

2Cited by

9References

8Claims

0Family size

Assignee

EMITEC Gesellschaft fuer Emissionstechnologie mbH · DE

Inventors

Peter Bauer · Siegburg, DE
Jan Hodgson · Troisdorf, DE

Key dates

Filing date	Oct 1, 2012
Grant date	Sep 22, 2015
Priority date	—
Expiry date	Jul 10, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/0318
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for operating a reducing agent delivery unit having a tank, a feed line running from the tank to an addition point, a return line branching off from the feed line and a valve to be activated with an electrical current for closing off the return line, includes initially applying an activation current to the valve for a first time interval. Subsequently, a holding current is applied to the valve when the first time interval has elapsed. Then, an operating variable of the delivery unit is determined and at least the activation current, the holding current and/or the first time interval are adapted as a function of the determined operating variable. A motor vehicle having a delivery unit is also provided.

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