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Method For Operating An Exhaust Gas Aftertreatment Device Of A Motor Vehicle

A technology for after-treatment of exhaust gas and motor vehicles, which is applied in the direction of electronic control of exhaust gas treatment devices, diagnostic devices of exhaust gas treatment devices, exhaust devices, etc., and can solve problems such as insufficient oxygen

Inactive Publication Date: 2018-05-08
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, during regeneration mode, there may not be enough oxygen present to convert all of the breakthrough hydrocarbons (HC) and / or carbon monoxide (CO) leaving the NOx storage catalyst

Method used

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  • Method For Operating An Exhaust Gas Aftertreatment Device Of A Motor Vehicle
  • Method For Operating An Exhaust Gas Aftertreatment Device Of A Motor Vehicle
  • Method For Operating An Exhaust Gas Aftertreatment Device Of A Motor Vehicle

Examples

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Embodiment Construction

[0022] first reference figure 1 .

[0023] figure 1 An internal combustion engine 4 and an exhaust gas aftertreatment device 6 of a motor vehicle 2 are shown.

[0024] The internal combustion engine 4 in this exemplary embodiment is a diesel engine, ie the diesel engine operates in normal mode with excess oxygen (λ>1). By way of deviation, internal combustion engine 4 can also be configured as a lean-mode gasoline engine in order to increase engine efficiency.

[0025] In the present exemplary embodiment, the exhaust aftertreatment device 6 connected downstream of the internal combustion engine 4 in the exhaust gas flow direction has a NOx storage catalyst 8 .

[0026] by deviating from figure 1 In the exemplary embodiment shown, the exhaust aftertreatment device 6 may contain other components (not shown) for exhaust aftertreatment, such as, for example, for removing carbon monoxide (CO) and hydrocarbons from the exhaust gas stream. Compound (C m h n ) diesel oxidation ...

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PUM

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Abstract

The present disclosure provides a method for operating an exhaust gas aftertreatment device for cleaning an exhaust gas flow of a motor vehicle with an internal combustion engine operated in normal mode with oxygen surplus. An oxygen store arranged downstream of an NOx storage catalyst of the exhaust gas aftertreatment device receives oxygen in normal mode, and during a regeneration mode emits oxygen for converting breakthrough hydrocarbons and / or carbon monoxide. The oxygen store is assigned to a particulate filter and / or an oxidation catalyst of the exhaust gas aftertreatment device. The particulate filter and / or the oxidation catalyst is arranged downstream of the NOx storage catalyst.

Description

technical field [0001] The invention relates to a method of operating an exhaust gas aftertreatment device for cleaning the exhaust gas flow of a motor vehicle having an internal combustion engine operating in normal mode with a surplus of oxygen. The invention also relates to an exhaust gas aftertreatment device and a motor vehicle having such an exhaust gas aftertreatment device. Background technique [0002] Exhaust aftertreatment devices utilize mechanical, catalytic or chemical methods to clean the combustion gases after they have left the combustion chamber of the internal combustion engine that drives the motor vehicle to comply with legal pollutant limits. [0003] Diesel engines and modern lean-mix gasoline engines operate in lean mode, ie utilize excess oxygen (λ>1). Therefore, conventional three-way catalytic converters cannot be used. In the case of excess oxygen, CO (carbon monoxide) and C m h n (incompletely combusted hydrocarbons), but NOx (nitrogen oxi...

Claims

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Application Information

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IPC IPC(8): F01N3/20B01D53/94
CPCB01D53/9418F01N3/101F01N3/2066F01N3/021F01N3/0814F01N3/0842F01N3/0864F01N3/0871F01N3/103F01N9/005F01N2900/1402F01N2900/1602Y02A50/20Y02T10/40F01N9/002F01N2550/20
Inventor 简·哈尔姆森马里奥·贝尔诺维奇
Owner FORD GLOBAL TECH LLC