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A method for monitoring an exhaust system

A technology of exhaust device and installation location, which is applied in the direction of exhaust device, electronic control of exhaust treatment device, diagnosis device of exhaust treatment device, etc., to achieve the effect of easy failure and saving sensor cost

Active Publication Date: 2014-07-30
ROLLS ROYCE SOLUTIONS GMBH
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  • Abstract
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  • A method for monitoring an exhaust system
  • A method for monitoring an exhaust system
  • A method for monitoring an exhaust system

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Embodiment Construction

[0033] exist figure 1 An exhaust device is shown schematically in FIG. 2 , which is designated as a whole by the reference number 10 . The illustration shows an exhaust gas line 12 in which the exhaust gas is conducted in the direction of flow (arrow 14 ). In the exhaust line 12 , and thus in the exhaust system 10 , a catalytic converter 18 is arranged at an installation location 16 , through which the exhaust gas flows in the exhaust line 12 in order to treat or after-treat the exhaust gas. The pollutant content of the exhaust gas is treated and reduced in this way.

[0034] A first temperature sensor 20 is arranged upstream of the installation point 16 in the flow direction 14 and thus upstream of the catalytic converter 18 , and a second temperature sensor 22 is arranged downstream of the installation point 16 in the flow direction 14 .

[0035] exist figure 2 The four diagrams in the figure show the temperature profile before and after a catalytic converter or installa...

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Abstract

A method and an arrangement for monitoring an exhaust system (10) of an internal combustion engine are disclosed. In said method and arrangement, temperature variations are measured upstream and downstream of an installation location (16) of a catalytic converter (18) in order to determine whether or not said catalytic converter (18) is installed.

Description

technical field [0001] The present invention relates to a method and assembly for monitoring an exhaust device. Background technique [0002] Exhaust systems are used to reduce the pollutant content of the exhaust gas formed during operation of the internal combustion engine. The remaining exhaust gas is then directed away. Exhaust systems typically include multiple components, specifically one or more mufflers, pipes, and catalysts. [0003] In particular, catalytic converters are used for exhaust gas treatment or aftertreatment in order to reduce the pollutant emissions in the exhaust gas. Various types of catalytic converters are known here, such as three-way catalytic converters, unregulated catalytic converters, oxidation catalytic converters and SCR catalytic converters. In SCR catalysts, for example, so-called selective catalytic reduction (SCR: Selective Catalytic Reduction) is used as a method for reducing nitrogen oxides. [0004] Various methods are known for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N11/00
CPCF01N3/2066F01N9/005F01N9/007F01N11/002F01N11/005F01N2550/02F01N2550/24F01N2560/06F01N2900/1404Y02T10/12Y02T10/40F01N3/20G01M15/102
Inventor J.尼迈尔A.托思T.施佩德
Owner ROLLS ROYCE SOLUTIONS GMBH
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