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Systems and methods for controlling regeneration of nitrogen oxide adsorbers

An adsorbent, nitrogen oxide technology, applied in chemical instruments and methods, separation methods, electrical control, etc., can solve the problems of SCR system failure, dosing agent exhaustion, SCR system limitation, etc.

Inactive Publication Date: 2014-04-09
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, SCR systems can be limited due to the need to store and inject dosing agent
In other words, the dosing agent can be depleted during engine operation, thus rendering the SCR system ineffective

Method used

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  • Systems and methods for controlling regeneration of nitrogen oxide adsorbers
  • Systems and methods for controlling regeneration of nitrogen oxide adsorbers
  • Systems and methods for controlling regeneration of nitrogen oxide adsorbers

Examples

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Embodiment Construction

[0052] The following description is merely exemplary in nature and is in no way intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the phrase at least one of A, B, and C should be construed as a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present invention.

[0053] As used herein, the term module refers to an application-specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or grouped) and memory that executes one or more software programs or firmware programs, combinational logic circuits , and / or other suitable components that provide the described functionality.

[0054] Typical nitrogen oxides (NO x ) adsorbent to adsorb NO from exhaust gas during lean operation x , and ...

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PUM

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Abstract

An exhaust treatment system includes a nitrogen oxide (NOx) monitoring module and a regeneration control module. The NOx monitoring module monitors first and second NOx levels in an exhaust stream produced by an engine, wherein the first NOx level is measured between first and second portions of a substrate of a NOx adsorber, wherein the second NOx level is measured upstream from the first portion of the substrate, and wherein the first portion of the substrate is upstream from the second portion of the substrate. The regeneration control module initiates a regeneration cycle of the NOx adsorber when the first NOx level is greater than a predetermined percentage of the second NOx level, wherein the regeneration cycle includes injecting hydrocarbons (HC) into the exhaust stream at a location upstream from the NOx adsorber.

Description

technical field [0001] This invention relates to internal combustion engines, and more particularly to methods for controlling nitrogen oxides (NO x ) System and method for regeneration of adsorbent. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. To the extent described in this Background section, the works of the presently named inventors and aspects of this description that do not constitute prior art at the time of application are neither expressly nor impliedly admitted to be prior art to the present invention. have technology. [0003] Internal combustion engines combust an air / fuel (A / F) mixture within cylinders to generate drive torque. An engine operating under leaner than stoichiometric A / F mixture (higher A / F ratio) may be referred to as a "lean burn engine". For example, lean-burn engines may include diesel engines, homogeneous charge compression ignition (HCCI)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00F01N9/00F01N3/08B01D53/04B01J20/34
CPCF01N13/009F01N3/0842F01N3/0871F01N2013/023F01N13/0093F01N3/021F01N13/02F01N2013/026F01N3/106F01N2560/14F01N2900/1402F01N2560/026Y02T10/26F01N3/0885F02D41/0245F01N13/0097F02D41/028Y02T10/12
Inventor M·B·弗内斯
Owner GM GLOBAL TECH OPERATIONS LLC
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