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Method and device for aftertreatment of exhaust gases of internal combustion engines

A technology of exhaust gas after-treatment and internal combustion engine, which is applied in the direction of electronic control of exhaust treatment device, diagnostic device of exhaust treatment device, exhaust device, etc., to achieve the effects of avoiding thermal damage, improving reliability and reducing cost

Active Publication Date: 2021-01-15
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such a temperature sensor is associated with additional costs as an additional component

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  • Method and device for aftertreatment of exhaust gases of internal combustion engines
  • Method and device for aftertreatment of exhaust gases of internal combustion engines
  • Method and device for aftertreatment of exhaust gases of internal combustion engines

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Embodiment Construction

[0045] figure 1 A device according to the invention for exhaust gas aftertreatment of an internal combustion engine 10 is shown. The device comprises an exhaust gas channel 12 connected to the internal combustion engine 10, in which the exhaust gas of the internal combustion engine 10 is arranged in the flow direction of the exhaust gas channel 12 through the second Lambda probe 30, the front catalytic converter 24, the first Lambda probe 20 and an aftercatalyst 28 in the form of a particle filter 26 with a three-way active catalytic coating. The front catalytic converter 24 is designed as a three-way catalytic converter, and the rear catalytic converter 28 is designed as a four-way catalytic converter, ie a particle filter 26 with a three-way active catalytic coating. Alternatively also available as in image 3 An uncoated particle filter 18 is used as shown in . Internal combustion engine 10 and lambda probes 20 , 30 are each connected via signal lines to a controller 22 ...

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Abstract

The invention relates to a method and an apparatus for exhaust gas post-treatment for an internal combustion engine. The apparatus is provided with an exhaust gas channel, a catalyst, a Lambda probe and a particulate filter. The method comprises the following steps: measuring the loading state of the particulate filter, through measuring internal resistance of a first Lambda probe, measuring exhaust gas temperature in the exhaust gas channel, measuring oxygen content in the exhaust gas through the first Lambda probe, and when the corresponding load condition is reached, the combustion air ratio of the internal combustion engine and temperature in the exhaust gas channel are in preset ranges for regeneration of the particulate filter, introducing regeneration of the particulate filter, when the temperature in the exhaust gas channel and / or oxygen content in the exhaust gas are above predetermined and limited threshold, preventing introduction of regeneration through corresponding engine measures, when temperature in then exhaust gas channel is below the limtited threshold, adjusting the particulate filter to regenerate by means of the corresponding engine measures.

Description

technical field [0001] The invention relates to a method and a device for aftertreatment of exhaust gases of internal combustion engines. Background technique [0002] The continuous intensification of exhaust gas legislation places high demands on vehicle manufacturers, which are met by appropriate measures for reducing untreated engine emissions and by appropriate exhaust gas aftertreatment. With the introduction of the next regulation level EU6, limit values ​​for particle counts are prescribed for gasoline engines. This can lead to, in some models may require the use of Otto particle filter (Ottopartikelfilter). Such an Otto particle filter is loaded with soot during driving operation. In order not to increase the exhaust backpressure too much, the Otto particle filter must be regenerated continuously or periodically. In order to carry out the thermal oxidation of the soot remaining in the Otto particle filter with oxygen, a sufficiently high temperature level is requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/023F01N11/00F01N9/00F01N13/00F01N3/035
CPCF01N3/023F01N3/035F01N9/002F01N11/002F01N11/007F01N13/0097F01N3/021F01N3/101F01N2430/08F01N2560/025F01N2560/14F01N2560/20F01N2900/1402F01N2900/1404F01N2900/1606Y02T10/12Y02T10/40
Inventor F.青克
Owner VOLKSWAGEN AG