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Systems and methods for monitoring the health of a selective catalytic reduction catalyst

A technology of SCR catalytic converter and controller, which is applied in the direction of chemical instruments and methods, separation methods, machines/engines, etc., and can solve the problems of reduced effectiveness of catalytic converters, etc.

Inactive Publication Date: 2016-10-12
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if health status is not closely monitored (for example, ammonia (NH 3 ) storage state), the catalytic converter may become less effective in reducing emissions over time

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  • Systems and methods for monitoring the health of a selective catalytic reduction catalyst
  • Systems and methods for monitoring the health of a selective catalytic reduction catalyst

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Embodiment Construction

[0043] One or more specific embodiments of the invention are described below. In an effort to provide a concise description of these embodiments, not all features of an actual implementation may be described in the specification. It should be recognized that in the development of any such actual implementation, as in any engineering or design project, many implementation-specific decisions must be made to achieve the developer's specific goals, such as compliance with system-related and business-related constraints , which may vary from one implementation to another. Moreover, it should be recognized that such a development effort might be complex and time-consuming, but would not be a routine task of designing, producing, and fabricating, to those of ordinary skill having the benefit of this disclosure .

[0044] When introducing elements of various embodiments of the invention, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the...

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Abstract

The invention relates to systems and methods for monitoring the health of a selective catalytic reduction catalyst. A system includes a controller programmed to monitor an NH3 storage state of a selective catalytic reduction (SCR) catalyst. The controller is programmed to receive signals representative of NH3 and / or NOX concentrations in a fluid both upstream of an inlet and downstream of an outlet of the SCR catalyst, to receive a signal representative of the measured NH3 storage of the SCR catalyst from at least one RF probe disposed within the SCR catalyst, to utilize a model to generate an estimated NH3 storage of the SCR catalyst based at least on the NH3 and / or NOX concentrations in the fluid both upstream and downstream of the SCR catalyst, to compare the estimated NH3 storage to the measured NH3 storage, and to output a control action for the SCR catalyst based at least on the comparison of the estimated NH3 storage to the measured NH3 storage.

Description

technical field [0001] The subject matter disclosed herein relates to an exhaust aftertreatment system for an internal combustion engine, and more particularly to monitoring the health of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system. Background technique [0002] An engine (eg, an internal combustion engine such as a reciprocating engine or a gas turbine) combusts a mixture of fuel and air to generate combustion gases that impart driving force to components of the engine (eg, to move pistons or drive a turbine). The combustion gases then exit the engine as exhaust, which may undergo an exhaust treatment (e.g., aftertreatment) system that includes one or more catalytic converters (e.g., three-way catalytic converter (TWC) assemblies, SCR catalytic converter assemblies etc.) to reduce nitrogen oxides (NO X ), hydrocarbons (HC), carbon monoxide (CO) emissions, and other emissions. However, if health status is not closely monitored (for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF01N11/00F01N2560/026F01N2560/021F01N3/2066F01N9/00F01N2550/02F01N2550/03F01N2560/12F01N2560/14F01N2570/18F01N2900/04F01N2900/1402F01N2900/1622Y02T10/12Y02T10/40B01D53/9409B01D53/9436B01D53/9495B01D2255/911F01N3/208F01N2610/02F01N2610/1406F01N2610/148F01N2900/1614
Inventor M.N.R.德瓦拉康达
Owner GENERAL ELECTRIC CO
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