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Filtration system and filtration method for a fluid reservoir

A storage and fluid technology, applied in chemical instruments and methods, separation methods, filtration separation, etc., can solve problems such as increasing system cost and complexity

Active Publication Date: 2018-07-06
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conditions such as the need to add heaters and / or other temperature control devices to the DEF supply system add cost and complexity to the system

Method used

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  • Filtration system and filtration method for a fluid reservoir
  • Filtration system and filtration method for a fluid reservoir
  • Filtration system and filtration method for a fluid reservoir

Examples

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Embodiment Construction

[0019] The present disclosure relates to emission control systems for machines, and more particularly to DEF filtration systems for use with SCR-type aftertreatment systems for diesel engines used on stationary or mobile machines. The machines contemplated in this disclosure may be used in a variety of applications and environments. For example, any machine that performs some type of operation associated with an industry such as mining, construction, agriculture, transportation, marine, or any other industry known in the art is contemplated. For example, such machines contemplated herein may be earth moving machines such as wheel loaders, backhoes, dump trucks, backhoes, material handlers, locomotives, pavers, and the like. In addition to mobile machines, contemplated machines may be stationary or portable machines, such as generator sets, motors driving gas compressors or pumps, and the like. In addition, machines may include or be associated with work implements such as tho...

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Abstract

Fluid reservoir (128) includes a reservoir (128) body (274) forming a storage volume (204) and a head opening (222). A head (202) seals a head opening (222) and includes at least one heater (212) and fluid extraction conduit (106) disposed within a reservoir volume (204). A bag filter (240) is attached to the head (202) so as to completely surround the heater (212) and the reservoir location of the DEF extraction conduit (106) located within the reservoir volume so that when fluid passes through the reservoir Fluid is filtered by the bag filter (240) as the sump (218) position is drawn from the reservoir volume (204).

Description

technical field [0001] The present invention relates generally to diesel exhaust fluid delivery systems for use with engine emission control systems, and more particularly to filtration systems and methods for use with urea delivery systems. Background technique [0002] One known method for eliminating certain diesel engine exhaust constituents is the use of exhaust aftertreatment systems utilizing selective catalytic reduction (SCR) of nitrogen oxides. In a typical SCR system, diesel exhaust fluid (DEF) may include urea or a urea-based aqueous solution and is mixed with exhaust gas before being provided to a suitable catalyst. In some applications, DEF is injected directly into the exhaust passage through a special injector device. In the case of urea, the injected DEF mixes with the exhaust gas and decomposes to provide ammonia (NH 3 ). Then, ammonia and nitrogen oxides (NO x ) reacts in the exhaust under the action of a catalyst to provide nitrogen (N 2 ) and water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/24F01N3/28B01D29/11B01D29/15
CPCB01D29/27B01D35/0276Y10T29/49826
Inventor T·J·卡西迪J·W·赫金斯D·阿尔曼
Owner CATERPILLAR INC