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Method and exhaust device for checking the loading state of a particle filter

A particle filter, exhaust gas technology, applied in the direction of dispersed particle filtration, membrane filter, chemical instruments and methods, etc.

Active Publication Date: 2021-07-27
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also only provides an estimate for the point in time for carrying out the regeneration and for the effectiveness of the carried out regeneration

Method used

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  • Method and exhaust device for checking the loading state of a particle filter
  • Method and exhaust device for checking the loading state of a particle filter
  • Method and exhaust device for checking the loading state of a particle filter

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0048] figure 1 Shown is a motor vehicle 14 comprising an internal combustion engine 3 with an exhaust gas system 13, wherein the exhaust gas system 13 has an exhaust gas line 2, a particle filter 1 arranged in the exhaust gas line 2, upstream of the exhaust gas filter 1 (in the exhaust gas line 2) and a second oxygen sensor 5 downstream of the particulate filter 1 (in the exhaust gas line 2) and for detecting the first measurement signal 16 of the first oxygen sensor 4 and the Control unit 15 of second measurement signal 17 of second oxygen sensor 5 . A time difference 9 between a first measurement signal 16 of the first oxygen sensor 4 and a second measurement signal 17 of the second oxygen sensor 5 is detected and evaluated by the control unit 15 . An excess of oxygen in the exhaust gas 6 introduced into the exhaust gas line 2 can thus be detected, for example, at a first point in time 7 by the first oxygen sensor 4 and at a second point in time 8 by the second oxygen sens...

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PUM

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Abstract

The invention relates to a method for checking the loading state of a particle filter (1) in an exhaust gas line (2) of an internal combustion engine (3), wherein the exhaust gas line (2) has at least a particle filter (1) , a first oxygen sensor (4) arranged upstream of the particulate filter (1) and a second oxygen sensor (5) arranged downstream of the particulate filter (1); wherein the method at least includes the following steps: a) introducing exhaust gas (6) with an excess of oxygen into the exhaust gas line (2) upstream of the first oxygen sensor (4), wherein a temperature of at least 500° C. exists in the particle filter (1); b) at At the first time point (7), the oxygen excess is identified by the first oxygen sensor (4); c) at the second time point (8), the oxygen excess is identified by the second oxygen sensor (5); d) by the first time point (7) The time difference (9) from the second point in time (8) determines the loading state of the particle filter (1). Furthermore, the invention relates to an exhaust system (13) of a motor vehicle (14).

Description

technical field [0001] The invention relates to a method and an exhaust gas system for checking the charging state of a particle filter, wherein the particle filter is arranged in an exhaust gas line of an internal combustion engine. The method is carried out in a motor vehicle. Background technique [0002] Motor vehicles with particle filters for filtering or trapping particles from the exhaust gas are generally known. It is also known that such particle filters often have to be regenerated, wherein regeneration leads to a reduction of particles in the particle trap. [0003] The timing of the required regeneration and the effectiveness of the performed regeneration are determined, for example, in the form of sensors. It is known to use pressure sensors, pressure sensor assemblies or differential pressure sensors for this purpose. However, the use of such sensors is very expensive, the method also providing only very inaccurate values. [0004] Modeling of particle loa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/021F01N9/00F01N11/00
CPCF01N9/002F01N11/007F01N3/021F01N2430/06F01N2550/04F01N2560/025F01N2560/14F01N2900/0421F01N2900/1606Y02T10/12Y02T10/40B01D46/0086B01D46/46B01D2279/30F01N3/023F01N2900/1602F02D41/0295F02D2200/0802F02D2200/0816B01D46/84
Inventor D.苏沙耶夫
Owner VOLKSWAGEN AG