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Method of operating an exhaust gas treatment system to prevent quenching during regeneration

A technology for quenching and exhaust gas treatment, which is applied to the electronic control of exhaust gas treatment devices, exhaust devices, exhaust gas treatment and other directions, and can solve problems such as reducing the performance of exhaust gas treatment systems and high temperature

Inactive Publication Date: 2012-09-26
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quenching of the oxidation catalyst can result in excessive hydrocarbons slipping through the oxidation catalyst, thereby reducing the performance of the exhaust gas treatment system, or can result in the collection of hydrocarbons on the substrate of the oxidation catalyst once the light-off temperature is reached and the collected hydrocarbons start to oxidize, which can cause excessive temperatures

Method used

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  • Method of operating an exhaust gas treatment system to prevent quenching during regeneration
  • Method of operating an exhaust gas treatment system to prevent quenching during regeneration
  • Method of operating an exhaust gas treatment system to prevent quenching during regeneration

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Embodiment Construction

[0012] refer to figure 1 , a method of operating the vehicle 84 includes controlling an exhaust treatment system 86 for treating exhaust from an engine 90 of the vehicle 84 , generally indicated by arrow 88 . Engine 90 may include, but is not limited to, a diesel engine. The method may be implemented as one or more algorithms executable on one or more controllers 84 of the vehicle 84 .

[0013] Exhaust gas treatment system 86 includes oxidation catalyst 92 . If engine 90 includes a diesel engine, oxidation catalyst 92 may be referred to as a diesel oxidation catalyst. Oxidation catalyst 92 is a flow-through device consisting of a tank containing a substrate or a honeycomb structure. The substrate has a large surface area coated with an active catalyst layer. Oxidation catalyst 92 treats the exhaust gas flow from engine 90 to reduce exhaust gas toxicity, ie, reduce toxic emissions from the exhaust system, including but not limited to nitric oxide (NO), carbon monoxide (CO),...

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PUM

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Abstract

A method of controlling an exhaust gas treatment system of a vehicle includes detecting a request to regenerate a particulate filter, and injecting hydrocarbons at an injection rate into a flow of exhaust gas upstream of an oxidation catalyst to heat the oxidation catalyst. The injection rate is increased at a current acceleration rate, and the current acceleration rate is reduced to define a reduced acceleration rate when the oxidation catalyst is quenched.

Description

technical field [0001] The present invention relates generally to methods of operating a vehicle, and more particularly, to a method of controlling an exhaust gas treatment system of a vehicle. Background technique [0002] Exhaust gas treatment systems for internal combustion engines, including but not limited to diesel engines, include an oxidation catalyst, often referred to as a diesel oxidation catalyst when coupled to a diesel engine, for treating the flow of exhaust gas from the engine. Oxidation catalysts are flow-through devices that consist of a tank containing a substrate or honeycomb structure. The substrate has a large surface area coated with an active catalyst layer. As the exhaust gas passes through the active catalyst layer, carbon monoxide, gaseous hydrogen and liquid hydrocarbon particles, ie unburned fuel and / or oil, are oxidized, thereby reducing harmful emissions. [0003] However, in order for the active catalyst layer to oxidize carbon monoxide, gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N9/00F01N3/20
CPCF01N2610/03F02D41/402F02D41/1446F01N2560/14F01N3/2033F01N3/0253Y02T10/47F01N2900/1621F01N2900/1626F02D41/1441F01N2900/1602F02D41/029F01N2430/085Y02T10/44F01N3/2066F01N2560/06Y02T10/24Y02T10/26F02D41/025Y02T10/12Y02T10/40Y02A50/20
Inventor 小托马斯.拉罗斯D.M.范布伦P.巴拉萨M.V.泰勒K.杰克逊
Owner GM GLOBAL TECH OPERATIONS LLC