Apparatus for measuring the filling level of a urea container having an ultrasound sensor and motor vehicle having a urea container
First Claim
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 sensor disposed in vicinity of the sump;
said sensor having a sound-emitting surface configured to emit sound waves and to receive echoes of the same sound waves for measuring the filling level of the urea container by distance determination; and
said sensor fitted on the urea container with said sound-emitting surface of said sensor adjoining at most the level of the urea container bottom, said sensor being disposed externally on the sump in a recess, and said sensor protruding at least partially into the sump.
1 Assignment
0 Petitions
Accused Products
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.
10 Citations
10 Claims
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1. A urea storage device for a motor vehicle comprising:
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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 sensor disposed in vicinity of the sump; said sensor having a sound-emitting surface configured to emit sound waves and to receive echoes of the same sound waves for measuring the filling level of the urea container by distance determination; and said sensor fitted on the urea container with said sound-emitting surface of said sensor adjoining at most the level of the urea container bottom, said sensor being disposed externally on the sump in a recess, and said sensor protruding at least partially into the sump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A urea storage device for a motor vehicle comprising:
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a urea container having a urea container bottom at a level and a sump lying below the level of said urea container bottom, said sump having an overall height and being downwardly bounded by a sump bottom and said sump adjoining said urea container bottom and having an open connection to said urea container; an apparatus for measuring a filling level of said urea container, said apparatus including; a sensor disposed in vicinity of said sump; said sensor having a sound-emitting surface configured to emit sound waves and to receive echoes of the same sound waves for measuring the filling level of said urea container by distance determination; and said sensor fitted on said urea container with said sound-emitting surface of said sensor adjoining at most the level of said urea container bottom, said sensor being disposed externally on said sump in a recess, and said recess protruding at least partially into said sump.
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Specification