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Fluid quality sensor and cover assembly

a technology of fluid quality sensor and cover, which is applied in the direction of instruments, machines/engines, mechanical equipment, etc., can solve the problems of affecting the measurement or reading of one or more sensors, affecting the quality of the fluid, and forming air or gaseous bubbles in the fluid

Active Publication Date: 2017-11-16
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent provides a sensor assembly for detecting the concentration of a fluid inside a diesel exhaust fluid tank assembly. The sensor assembly includes a sensor and a cover assembly. The cover assembly is at least partially enclosing the sensor and is impermeable to the gas portion of the fluid except for openings in the cover assembly. The cover assembly includes a top wall, a first side wall, and a second side wall, and a baffle enclosing the sensor and the cover assembly. The cover assembly has a first plurality of openings in the top wall, a first space between the cover assembly and the first plate, and a second space between the cover assembly and the second plate. The sensor assembly can detect the quality of the fluid inside the tank assembly.

Problems solved by technology

When the fluid level inside the tank is low, it may splash or slosh resulting in air or gaseous bubbles forming in the fluid.
The air or gaseous bubbles can interfere with the one or more sensors inside the tank and distort measurements or readings taken by the one or more sensors.

Method used

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  • Fluid quality sensor and cover assembly
  • Fluid quality sensor and cover assembly
  • Fluid quality sensor and cover assembly

Examples

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Embodiment Construction

[0019]The embodiments of the present disclosure described below are not intended to be exhaustive or to limit the disclosure to the precise forms in the following detailed description. Rather, the embodiments are chosen and described so that others skilled in the art may appreciate and understand the principles and practices of the present disclosure.

[0020]Government regulations in the United States and elsewhere have mandated certain emission requirements from engine manufacturers. To meet these regulations, engine and other manufacturers are producing after treatment exhaust systems to reduce pollutant gases that exhaust from engines. In some cases, nitrogen oxides (NOx) may be reduced by approximately 80%.

[0021]Referring to FIG. 1, a simplified embodiment of an after treatment exhaust system 100 is provided. In this system 100, a diesel engine 102 is shown being fluidly coupled to a turbocharger 104. The engine 102 can be any type of engine for purposes of this disclosure, and th...

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PUM

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Abstract

A sensor assembly is provided for detecting a concentration of a fluid. The sensor assembly includes a sensing unit and a cover assembly. The sensing unit includes a transmitter configured to transmit a signal into a sensing volume and a receiver configured to receive the signal after the signal passes through a portion of the sensing volume. The cover assembly at least partially encloses the sensing volume and is substantially impermeable to a gas portion of the fluid. The cover assembly includes apertures defined therein which are permeable to the gas portion of the fluid. A first plurality of apertures are defined along a top surface of the cover assembly.

Description

FIELD OF THE DISCLOSURE[0001]The present disclosure relates to a sensor assembly, and in particular to a sensor and cover assembly for detecting a fluid quality.BACKGROUND OF THE DISCLOSURE[0002]Exhaust treatment fluids such as diesel exhaust fluid (DEF) may be used in a vehicle's exhaust after treatment system. The fluid is stored in a tank or container on a vehicle, and is injected into an exhaust stream to breakdown harmful pollutants such as mono-nitrogen oxides (NOx) into harmless by-products such as ammonia and carbon dioxide. The storage tank may include one or more sensors for determining a temperature of the fluid level, a fluid level in the tank, and a concentration or quality of the fluid in the tank.[0003]During vehicle or machine operation, the fluid inside the tank may move around particularly as the vehicle or machine travels over different terrains. When the fluid level inside the tank is low, it may splash or slosh resulting in air or gaseous bubbles forming in the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01D11/24G01M15/10
CPCG01M15/102G01D11/245F01N11/00F01N2560/00G01N29/02G01N2291/021F01N2560/02G01N29/00G01N29/024G01N29/222G01N2291/011G01N2291/0228G01N2291/02809G01F23/28
Inventor KRUSE, RYAN J.FLANAGAN, MICHAEL F.COPELAND, JONATHAN R.LAHEY, FRANCIS J.
Owner DEERE & CO