Device and method for regenerating a particle filter arranged in the exhaust tract of an internal combustion engine

A particle filter, internal combustion engine technology, applied in the direction of exhaust device, electronic control of exhaust treatment device, diagnosis device of exhaust treatment device, etc. It can reduce the regeneration temperature, reduce carbon monoxide emissions, and shorten the regeneration duration.

Active Publication Date: 2011-12-28
MAN NUTZFAHRZEUGE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the fact that the particles have to be oxidized by means of oxygen alone, since there is no NO in this stage 2 for use, which results in prolonged regeneration times and high CO emissions
[0027] At the same time, NO oxidation catalytic c

Method used

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  • Device and method for regenerating a particle filter arranged in the exhaust tract of an internal combustion engine
  • Device and method for regenerating a particle filter arranged in the exhaust tract of an internal combustion engine
  • Device and method for regenerating a particle filter arranged in the exhaust tract of an internal combustion engine

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Embodiment Construction

[0060] exist image 3 shows a first exemplary embodiment according to the invention, in which an exhaust gas flow 2 is led to a NO oxidation catalytic converter 4 by means of a delivery line 3 in an exhaust tract 1 of an internal combustion engine, not shown here, in particular a diesel internal combustion engine . From this NO oxidation catalytic converter 4 an outlet line 5 leads to a particle filter 6 .

[0061] Upstream of the NO oxidation catalyst 4 , a branch line 7 branches off from the delivery line 3 and opens downstream of the NO oxidation catalyst 4 into the outlet line 5 .

[0062] In this branch line 7, an HC oxidation catalyst 8 is arranged as a heating device. In addition, nozzles 9 are arranged upstream of the HC oxidation catalyst 8 in the branch line 7 , by means of which fuel 10 can be injected as reducing agent into the branch line 7 upstream of the HC oxidation catalyst 8 .

[0063] For this reason, the nozzle 9 is part of a metering device 11 which, in...

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Abstract

The invention relates to a device and a method for regenerating a particulate filter arranged in the exhaust section of an internal combustion engine, having at least one NO oxidation catalytic converter, which is arranged upstream of the particulate filter, for the oxidation of NO in particular to form NO2. According to the invention, at least one heating device (8; 19) is also provided upstream of the particulate filter (6), by means of which heating device (8; 19) an exhaust-gas flow (2'') which is conducted to the particulate filter (6) can be heated to a defined temperature in accordance with defined regeneration parameters, in particular in accordance with a degree of loading of the particulate filter (6) and/or in accordance with an efficiency of an NO2-based regeneration of the particulate filter (6) by means of an NO2 quantity formed in the at least one NO oxidation catalytic converter (4).

Description

technical field [0001] The invention relates to a device for regenerating a particle filter arranged in an exhaust tract of an internal combustion engine according to the preamble of claim 1 and to a device according to the preamble of claim 8 A method for regenerating a particle filter arranged in an exhaust tract of an internal combustion engine. [0002] In particular, the invention relates to a method and a device for regenerating a particle filter for an internal combustion engine operated with an excess of air, such as a diesel or gasoline engine with direct injection, as it finds application, for example, in motor vehicles or commercial vehicles . Background technique [0003] In order to reduce carbon-containing fine particles, so-called particle separators or particle filters are often used in vehicles. A typical particle separator assembly in a vehicle is known, for example, from EP 10 727 65 A2. Such a particle separator thus differs from a particle filter in t...

Claims

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Application Information

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IPC IPC(8): F01N3/023F01N3/025F01N3/027F01N9/00
CPCF01N3/025F01N3/30F01N9/002F01N3/0231F01N2410/04F01N2240/16F01N13/04F01N13/02F01N2240/14Y02T10/47F01N2610/03F01N3/027F01N13/009F01N13/011Y02T10/40F01N3/023F01N3/0842F01N11/002F01N2560/06F01N2570/14
Inventor A·德林
Owner MAN NUTZFAHRZEUGE AG
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