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Recirculating exhaust treatment fluid system

A technology of exhaust gas treatment and fluid system, which is applied in the direction of exhaust gas treatment, electronic control of exhaust gas treatment device, diagnosis device of exhaust gas treatment device, etc., can solve problems such as interference with the operation of sensors

Inactive Publication Date: 2015-12-23
TENNECO AUTOMOTIVE OPERATING CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The return of urea solution to the tank can sometimes interfere with the operation of various sensors in the tank

Method used

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  • Recirculating exhaust treatment fluid system
  • Recirculating exhaust treatment fluid system
  • Recirculating exhaust treatment fluid system

Examples

Experimental program
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Embodiment Construction

[0023] Several exemplary embodiments will now be described more fully with reference to the accompanying drawings.

[0024] figure 1 An exhaust system 10 according to the invention is shown schematically. Exhaust system 10 may include at least one engine 12 in communication with a fuel source (not shown) that, once consumed, produces exhaust gases that discharge into an exhaust passage 14 having an exhaust aftertreatment system 16 . Downstream of the engine 12 may be disposed an exhaust treatment component 18 which may include a DOC, a DPF component or, as shown, an SCR component 20 . Although not required by the present disclosure, exhaust aftertreatment system 16 may further include components such as heat boosters or burners 17 to increase the temperature of exhaust gases passing through exhaust passage 14 . Increasing exhaust gas temperature facilitates ignition of the catalyst in exhaust treatment component 18 during cold weather conditions and when engine 12 is started...

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PUM

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Abstract

An exhaust treatment fluid system includes a tank housing for storing an exhaust treatment fluid. A suction tube includes a first end positioned within the housing. A first sensor is positioned within the tank housing for determining at least one of a fluid level and a concentration of the exhaust treatment fluid. A skirt is positioned in the tank to peripherally surround the first sensor.

Description

technical field [0001] The present disclosure relates to an exhaust aftertreatment system including a reductant sensor system. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] An exhaust aftertreatment system doses an exhaust treatment fluid into the exhaust stream to assist in the chemical reaction that removes NOx from the exhaust. The exhaust treatment fluid may be stored in a storage tank in communication with a dosing module that doses the exhaust treatment fluid into the exhaust flow. The storage tank may include various sensors for determining the temperature of the fluid level, the fluid level within the tank, and the concentration of the fluid within the tank. When the exhaust treatment fluid is a urea solution, the solution may freeze at cold temperatures. In order to prevent the urea solution from freezing in the dosing module, the dosing module can be purge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N9/00F01N3/20F01N3/36F01N11/00
CPCF01N3/2066F01N2550/05F01N2610/02F01N2610/1406F01N2610/148F01N2900/0422F01N2900/1811F01N2900/1814G01F23/296F01N11/00G01F23/2961Y02A50/20Y02T10/12Y02T10/40B01D53/9495
Inventor 杨建元古鲁·考斯图布·维拉斯·泰吉瑞安·A·弗洛伊德布鲁斯·克林布莱恩·孔克尔
Owner TENNECO AUTOMOTIVE OPERATING CO INC