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Measuring element and method for differentiating different liquids

A technology of measuring components and liquids, which is applied in the direction of engine components, electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, etc., can solve the problems of DENOX system quality reduction or function deterioration, and achieve the goal of improving the judgment accuracy Effect

Active Publication Date: 2018-10-02
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Since the vast majority of the ammonia content goes back into the melt, this process results in negligible degradation or functional deterioration of the DENOX system

Method used

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  • Measuring element and method for differentiating different liquids
  • Measuring element and method for differentiating different liquids
  • Measuring element and method for differentiating different liquids

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Embodiment Construction

[0019] The invention is explained in more detail below on the basis of the exemplary embodiments shown in the drawings, as well as according to further advantageous configurations. Identical components or components with the same function are identified with the same reference symbols in the figures.

[0020] exist figure 1 A storage container 10 for storing a liquid 12 , for example an aqueous urea solution, is shown in , with a filling connection 20 , wherein the filling connection 20 opens into an inlet region 22 . A measuring element 50 for detecting the material properties of the liquid is arranged in the inlet region 22 , wherein the measuring element 50 is connected to a measuring device 60 via a signal line 59 .

[0021] Depending on certain properties of the liquid 12 or derivatives of the liquid 12, for example aqueous urea as liquid 12 or solid urea or urea crystals as a derivative of liquid 12, it is relatively simple to determine the mass of the liquid with suffi...

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Abstract

The invention relates to a measurement element (50) and a method for differentiating various kinds of liquids (12), in particular for measuring a concentration of an aqueous urea solution, wherein a phase transition of a liquid (12) or a derivative of the liquid (12) is caused and the liquid (12) or the derivative of the liquid (12) is recognised on the basis of substance properties that correlate to the phase transition of the liquid (12) or of the derivative of the liquid (12).

Description

technical field [0001] The invention relates to a measuring element and a method for differentiating between different types of liquids. Background technique [0002] So-called denitrification DENOX systems for the denitrification of exhaust gases from diesel engines have proven to be reliable, in which the nitrogen oxides in the exhaust gases of diesel engines are converted into nitrogen and water vapor by dosing in aqueous urea solutions. The aqueous urea solution is stored in a storage container and fed to the exhaust gas duct of the diesel engine by means of an electrically regulated dosing system. Due to misfilling, e.g. filling the storage container for the aqueous urea solution with fuel, coolant or water, or purposeful manipulation, e.g. diluting the aqueous urea solution with water, the function of the DENOX system may be adversely affected, which may lead to a malfunction of the DENOX system and / or permanent damage. A measuring principle is known from EP 1 283 33...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F01N11/00
CPCF01N3/208F01N11/00F01N2550/05F01N2610/02F01N2610/1406F01N2610/148F01N2900/1818G01N25/04Y02T10/12Y02T10/40
Inventor S·勒施
Owner ROBERT BOSCH GMBH
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