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Method and apparatus for diagnosis of detachment of assembly of exhaust cleaning component

A technology of exhaust purification and components, which is applied in the direction of diagnosis device of exhaust treatment device, exhaust device, electric control of exhaust treatment device, etc., which can solve the problems of little energy, low quality of carbon black, and impossibility of realization

Active Publication Date: 2015-11-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For internal combustion engines running on gasoline, this is rarely or not possible due to the low mass of soot in the particle filter

Method used

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  • Method and apparatus for diagnosis of detachment of assembly of exhaust cleaning component
  • Method and apparatus for diagnosis of detachment of assembly of exhaust cleaning component
  • Method and apparatus for diagnosis of detachment of assembly of exhaust cleaning component

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Embodiment Construction

[0033] figure 1 The technical environment in which the method according to the invention can be used is shown schematically. An internal combustion engine 10 designed as an Otto engine is shown here by way of example, the exhaust gas of which is discharged via an exhaust system 12 in which an exhaust gas purification component 14 is arranged. In the embodiment shown, a first sensor 13 is arranged in the exhaust tract 12 downstream of the internal combustion engine 10 and upstream of the exhaust gas purification component 14 in the direction of flow of the exhaust gas flow 19 , Furthermore, a second sensor 15 is arranged downstream of the exhaust gas purification component 14 . The output signals of the first sensor 13 and the second sensor 15 are sent to the diagnosis unit 11 , which is a part of the engine control system (Electronic Control Unit, electronic control unit).

[0034] In order to diagnose removal of the exhaust gas purification component 14 within the scope of ...

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Abstract

The invention relates to a method for the diagnosis of detachment of an exhaust cleaning component in an exhaust system of an internal combustion engine. The first time curve of the exhaust state parameters before the exhaust cleaning component in the exhaust system and a second time curve of the exhaust state parameters after the exhaust cleaning component are determined by means of a sensor. According to the invention, in order to identify the detachment of the exhaust cleaning component, a first gradient of the first time curve and a second gradient of the second time curve are formed, relation is formed between the time curve of the first gradient and the time curve of the second gradient and the detachment of the exhaust cleaning component is deducted when the related coefficient exceeding the pre-given limit. The method has the advantages that even the absolute temperature difference is small, as shown in particular in a case that a gasoline direct injector is used as the internal combustion engine, the diagnosis of detachment can be achieved.

Description

technical field [0001] The invention relates to a method for diagnosing the removal of an exhaust gas purification component in the exhaust system of an internal combustion engine, wherein the exhaust gas upstream of the exhaust gas purification component in the exhaust system is determined by means of a second sensor A first time curve of the state variable of the exhaust gas and a second time curve of the state variable of the exhaust gas after the exhaust gas purification component. [0002] Furthermore, the invention relates to a device, in particular a diagnostic unit, for carrying out the method according to the invention. Background technique [0003] In particular in the United States and Europe, emission legislation establishes limit values ​​for the emission of particle masses and also for particle numbers or particle concentrations. Furthermore, there are also regulations regarding the permissible emissions of nitrogen oxides and carbon monoxide. In addition to ...

Claims

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Application Information

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IPC IPC(8): F01N11/00F01N3/035
CPCF01N11/00F01N2550/24Y02T10/40
Inventor T.蔡因T.鲍曼连运捷
Owner ROBERT BOSCH GMBH