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Method and apparatus for monitoring a particulate filter

A particulate matter filter and exhaust gas temperature technology, which is applied in the direction of measuring devices, exhaust devices, and electronic control of exhaust treatment devices, and can solve problems such as diagnostics that are not mentioned

Active Publication Date: 2019-07-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Diagnosis of removed components is not mentioned

Method used

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  • Method and apparatus for monitoring a particulate filter
  • Method and apparatus for monitoring a particulate filter
  • Method and apparatus for monitoring a particulate filter

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Embodiment Construction

[0035] figure 1 Technical fields in which the present invention can be applied are shown. A gasoline-operated internal combustion engine 10 is supplied with combustion air via an air supply system 11 and discharges exhaust gases via an exhaust gas duct 14 . Arranged in the exhaust gas duct 14 downstream of the internal combustion engine 10 is a three-way catalytic converter 13 , after which a particle filter 16 is arranged in the flow direction of the exhaust gas. The temperature of the exhaust gas is determined upstream of the particulate filter 16 with a first temperature sensor 15 and downstream of the particulate filter 16 with a second temperature sensor 17 . The first temperature sensor 15 and the second temperature sensor 17 are connected to the control unit 12 in which their signals are evaluated in order thereby to monitor the presence and function of the particle filter 16 . In another specific embodiment, the temperature of the exhaust gas upstream of the particle...

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Abstract

The invention relates to a method for monitoring a particle filter in the exhaust gas tract of an internal combustion engine operated on gasoline. The invention also relates to a device for carrying out the method. According to the invention it is provided that a first exhaust gas temperature upstream of the particle filter and a second exhaust gas temperature downstream of the particle filter are determined from the difference between the first and second exhaust gas temperature or from the first and second exhaust gas temperature The presence and / or correct functioning of the particle filter can be deduced from the different time curves. The method is based on the detection of the effect of the thermal mass of the particulate filter or its influence on the exhaust gas temperature during combustion of soot particles accumulated in the particulate filter. The temperature curves before and after the particle filter thus show characteristic differences. If these conditions do not arise, the particulate filter is removed and replaced, for example, with a length of pipe whose thermal mass is substantially less than that of the particulate filter.

Description

technical field [0001] The invention relates to a method for monitoring a particle filter in the exhaust gas tract of an internal combustion engine operated on gasoline. [0002] The invention also relates to a device for monitoring a particle filter in the exhaust gas tract of an internal combustion engine operated on gasoline, the internal combustion engine being equipped with a control unit. Background technique [0003] Particle filters in the exhaust gas tract of internal combustion engines operating on gasoline serve to reduce the particles emitted by the internal combustion engine. Like the particulate filter for an internal combustion engine operated with diesel, in an internal combustion engine operated with gasoline, the particulate filter must be regenerated, if necessary, by burning off the particulate matter. This regeneration must be monitored. Furthermore, regulations provide that the correct function and presence of the particle filter is monitored during o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00
CPCF01N11/005F01N2550/04F01N2560/06F01N2900/1404Y02T10/40G01K13/02G01M15/102
Inventor M.维利莫夫斯基E.巴尔斯T.杭德勒K.温克勒T.蔡因
Owner ROBERT BOSCH GMBH