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Oxidation catalyst monitoring

a technology of oxidation catalyst and monitoring device, which is applied in the direction of electrical control, machine/engine, exhaust treatment electric control, etc., can solve the problems of affecting the ability of hc and co to oxidiz

Inactive Publication Date: 2013-10-31
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a method and system for controlling the operation of an oxidation catalyst in an exhaust system of an engine. The system includes a control module that determines an open loop factor based on an aging factor and an efficiency curve, and controls the injection of hydrocarbons into the exhaust stream based on that factor. The control module also monitors the oxidation catalyst based on the injection of hydrocarbons. The technical effect of this invention is to improve the performance and efficiency of the engine's exhaust system by optimizing the operation of the oxidation catalyst through real-time control of the amount of hydrocarbons injected into the exhaust stream.

Problems solved by technology

As the oxidation catalyst ages, its ability to oxidize the HC and CO is affected.

Method used

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Embodiment Construction

[0011]The following description is merely exemplary in nature and is not intended to limit the present disclosure, its application or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. As used herein, the term module refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory that executes one or more software or firmware programs, a combinational logic circuit, and / or other suitable components that provide the described functionality.

[0012]Referring now to FIG. 1, an exemplary embodiment is directed to a vehicle 10 that includes an exhaust treatment system 12 for the reduction of regulated exhaust gas constituents of an internal combustion engine 14. As can be appreciated, the exhaust treatment system 12 described herein can be implemented in various engine systems. Such engine systems may include, for example, but...

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Abstract

A control method for monitoring an oxidation catalyst of an exhaust system is provided. The control method includes determining an open loop factor based on an aging factor and an efficiency curve; controlling an injection of hydrocarbons into an exhaust stream based on the open loop factor; and monitoring the oxidation catalyst based on the injection of hydrocarbons.

Description

FIELD OF THE INVENTION[0001]The subject invention relates to methods, and systems for monitoring an oxidation catalyst of an exhaust system.BACKGROUND[0002]An oxidation catalyst device is provided in an exhaust system to treat unburned gaseous and non-volatile hydrocarbon (HC) and carbon monoxide (CO). The oxidation catalyst oxidizes the HC and CO under high temperatures conditions to form carbon dioxide (CO2) and water (H2O). As the oxidation catalyst ages, its ability to oxidize the HC and CO is affected. Accordingly, it is desirable to provide methods and systems that monitor the operation of the oxidation catalyst.SUMMARY OF THE INVENTION[0003]In one exemplary embodiment, a control method for monitoring an oxidation catalyst is provided. The control method includes: determining an open loop factor based on an aging factor and an efficiency curve; controlling an injection of hydrocarbons into an exhaust stream based on the open loop factor; and monitoring the oxidation catalyst b...

Claims

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Application Information

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IPC IPC(8): F01N11/00
CPCF01N3/103F01N3/2066F01N11/00F01N2550/02F01N2900/0408F01N2900/102F01N2900/1621F02D41/1446F02D41/22F02D2041/228F02D2200/0802Y02T10/12Y02T10/40
Inventor JACKSON, KARILAROSE, JR., THOMASFUNK, SARAHTAYLOR, MICHAEL V.VANBUREN, DAVID MICHAEL
Owner GM GLOBAL TECH OPERATIONS LLC
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