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Systems and methods for monitoring the health of a mid-bed oxidant injection system

An oxidant and inlet technology, which is applied to the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, machines/engines, etc., can solve the problems of reducing the efficiency of catalysts in reducing emissions.

Inactive Publication Date: 2016-10-05
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the health of one or more components of the exhaust treatment system is not closely monitored, the effectiveness of the catalyst in reducing emissions may decrease over time

Method used

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  • Systems and methods for monitoring the health of a mid-bed oxidant injection system
  • Systems and methods for monitoring the health of a mid-bed oxidant injection system

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Embodiment Construction

[0046] One or more specific embodiments of the invention are described below. In an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the study of any such practical embodiment, as in any engineering or design project, many implementation-specific decisions must be made to achieve the researcher's specific objectives, such as those related to the system involved and to the constraints of the business involved , which may vary depending on the implementation. In addition, it should be understood that such research efforts can be complex and time consuming, but nevertheless are a routine undertaking of design, construction, and fabrication for those of ordinary skill having the benefit of this disclosure.

[0047] When introducing elements of various embodiments of the invention, the articles "a," "an," "the," and "said" are intended to mean that ther...

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Abstract

The invention relates to systems and methods for monitoring the health of a mid-bed oxidant injection system. A system includes a controller. The controller is programmed to determine an oxidation state of a three-way catalyst (TWC) assembly based on a first signal representative of a measured oxygen (O2) storage of the TWC assembly received from a radio frequency (RF) probe disposed within the TWC assembly, to determine whether a temperature of a fluid flowing into an ammonia slip catalyst (ASC) assembly is within a desired temperature operating range based on a second signal representative of the temperature of the fluid adjacent an inlet of the ASC assembly, to determine whether a concentration of nitrogen oxides (NO<X>) in the fluid exiting an outlet of the ASC assembly is within desired limits based on a third signal representative of the concentration of NO<X> in the fluid, and to determine whether to perform diagnostics on a component of the system based at least on the first, second, and third signals.

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 an intermediate bed oxidant injection system 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 produce combustion gases that apply driving force to the engine's components (eg, moving pistons or driving a turbine). Next, the combustion gases leave the engine as exhaust, which may encounter an exhaust treatment (e.g., aftertreatment) system that includes one or more catalytic converters (e.g., three-way catalyst (TWC) assemblies, ammonia slip catalysis (ASC) components, etc.), thereby reducing nitrogen oxides (NO X ), hydrocarbons (HC), carbon monoxide (CO) emissions, and other emissions. However, if the health of one or more components of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00F01N3/10
CPCF01N3/101F01N11/00F01N11/002F01N2900/1624F01N2550/02F01N3/105F01N3/106F01N3/22F01N3/225F01N3/30F01N3/32F01N9/00F01N2430/06F01N2550/03F01N2550/14F01N2560/026F01N2560/06F01N2560/12F01N2560/14F01N2570/14F01N2570/16F01N2570/18F01N2590/10F01N2900/1402F01N2900/1404F01N2900/1622F01N2900/1804F01N13/009Y02A50/20Y02T10/12Y02T10/40F01N11/007
Inventor M.N.R.德瓦拉康达
Owner GENERAL ELECTRIC CO