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Control strategy for heated fluid lines

A fluid pipeline and pipeline technology, which is applied in the system field of fluid reducing agent, can solve the problem that the SCR system cannot be delivered and so on.

Inactive Publication Date: 2012-12-05
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adverse consequence of this situation is that the SCR system cannot adequately deliver frozen reductant from the storage tank and introduce it into the exhaust system to convert NOx

Method used

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  • Control strategy for heated fluid lines
  • Control strategy for heated fluid lines
  • Control strategy for heated fluid lines

Examples

Experimental program
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Embodiment Construction

[0016] see figure 1 , shows the power system 100 in the form of an internal combustion engine incorporated in a vehicular type machine 102, such as a dump truck. Although the illustrated power system is an internal combustion engine and specifically a diesel engine, the invention may relate to any suitable type of power system burning fossil fuels and the like, such as gasoline engines, natural gas engines, propane-based engines and coal-fired power system. Also, while machine 102 is illustrated as a dump truck, it should be appreciated that power system 100 may be implemented on any type of vehicle-type machine that employs such a system to drive the movement or operation of a work implement. The power system can also be used in any of various stationary applications such as generators and pumps.

[0017] The power system 100 is associated with an exhaust system 110 that entrains exhaust products produced by the combustion process. Powertrain system 100 and exhaust system ...

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PUM

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Abstract

A control strategy selectively controls the heating of fluid lines (128) equipped with line heaters (130) that may be utilized with a selective catalytic reduction system (120). The control strategy measures a tank temperature representative of reductant agent in a storage tank (124) and a representative ambient temperature representative of an ambient temperature proximate the fluid line (128). The control strategy determines a lowest possible reductant agent temperature ("LPRAT") based on the measured tank temperature and representative ambient temperature. The LPRAT is compared with a desired reductant agent temperature and, in response to the comparison, the control strategy may activate the line heater (128).

Description

technical field [0001] The present patent disclosure relates generally to exhaust gas treatment systems for internal combustion engines, and more particularly to systems and methods for thermally treating fluid reductant in such systems. Background technique [0002] Internal combustion engines—including diesel engines, gasoline engines, and engines that burn natural gas—form and emit a variety of pollutants during operation that can be harmful to the environment and human and animal health. These air pollutants may include, for example, nitrogen oxides such as NO 2 and NO 3 , commonly referred to as NOx. As a result of increased environmental awareness, including government-enforced emissions regulations and controls, many internal combustion engine manufacturers have taken steps to reduce the amount and impact of pollutants formed. Some of these measures are incorporated into exhaust systems associated with internal combustion engines to remove, trap or chemically react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20B01D53/94F01N3/10F01N9/00
CPCF01N3/2066F01N2550/05F01N11/00F01N2900/0422F01N2900/1811Y02T10/24Y02C20/10F01N2900/12F01N2610/10Y02T10/47F01N2610/02Y02T10/12Y02T10/40
Inventor D·J·麦科伊S·J·芬克E·金
Owner CATERPILLAR INC