Apparatus for measuring the filling level of a urea container having an ultrasound sensor and motor vehicle having a urea container

Patent metadata

Field	Value
Publication number	US-8943812-B2
Application number	US-201313771558-A
Country	US
Kind code	B2
Filing date	Feb 20, 2013
Priority date	Aug 20, 2010
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

An apparatus for measuring a filling level of a urea container by determining distance using sound waves (ultrasound) emitted by a sensor and echoes thereof, includes a urea container bottom and a sump with an overall height. The sump is adjacent the urea container bottom and located below the level of the urea container bottom. The sump is connected in an open manner to the urea container and bounded at the bottom by a sump bottom. The sensor is accommodated in the vicinity of the sump and, with a sound-emitting surface for emitting sound waves and receiving echoes of the sound waves, is fitted in the urea container with the sound-emitting surface of the sensor at most adjacent the level of the urea container bottom. A motor vehicle having the urea container is also provided.

First claim

The invention claimed is:

1. A urea storage device for a motor vehicle comprising:
a urea container having a urea container bottom at a level and a sump lying below the level of the urea container bottom, the sump having an overall height and being downwardly bounded by a sump bottom and the sump adjoining the urea container bottom and having an open connection to the urea container;
an apparatus for measuring a filling level of the urea container, the apparatus including:
a se…

Assignees

• Emitec Emissionstechnologie

Inventors

• Schepers Sven
• Hodgson Jan

Classifications

• G01F23/2963

  Physics · mapped topic

• G01F23/2962 Primary

  Physics · mapped topic

• F01N3/2066

  Mechanical Engineering · mapped topic

• F01N2610/142

  Mechanical Engineering · mapped topic

• G01F23/00 Primary

  Physics · mapped topic