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Method for checking the function of a temperature sensor arrangement

A technology of temperature sensors and components, applied in the application of thermometers, thermometers, thermometer testing/calibration, etc.

Active Publication Date: 2020-04-03
AVL LIST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In such methods, errors are found when the differences between the compared temperatures are too large

Method used

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  • Method for checking the function of a temperature sensor arrangement
  • Method for checking the function of a temperature sensor arrangement

Examples

Experimental program
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Embodiment Construction

[0063] Unless otherwise stated, the reference numerals correspond to the following parts:

[0064] Diesel oxidation catalyst DOC 1, diesel particulate filter DPF 2, catalytic converter SCR for selective catalytic reduction 3, ammonia slip catalytic converter ASC 4, cylinder 5, internal combustion engine 6, first temperature sensor 7, second temperature sensor 8. The third temperature sensor 9 , the fourth temperature sensor 10 and the exhaust gas reprocessing equipment 11 .

[0065] figure 1 A schematic illustration of an exhaust gas aftertreatment system 11 of an internal combustion engine 6 , in particular of a motor vehicle internal combustion engine, is shown.

[0066] According to this example, internal combustion engine 6 includes four cylinders 5 . An exhaust gas aftertreatment device 11 is provided connected to the internal combustion engine 6 . The exhaust gas produced by the internal combustion engine 6 is fed into an exhaust gas aftertreatment device 11 and flows...

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Abstract

The invention relates to a method for checking the function of a temperature sensor arrangement of an exhaust gas aftertreatment system (11) of an internal combustion engine (6), the temperature sensor arrangement comprising at least three temperature sensors (7, 8, 9, 10) arranged in the course of the exhaust gas aftertreatment system (11). The expected temperature of the temperature sensors (7,8, 9, 10) is calculated in a physical and / or kinetic model, and the measured temperatures of the respective temperature sensors (7, 8, 9, 10) serves as the respective input variables for the calculation. If the calculated temperatures of the respective temperature sensor (7, 8, 9, 10) are different from the respective measured temperatures, or the calculated temperatures of the respective temperature sensors (7, 8, 9, 10) following the measured temperatures of the respective temperature sensors (7, 8, 9, 10) or possibly following temperature sensors (7, 8, 9, 10) deviate and all other temperature sensors (7, 8, 9, 10) are functional, one temperature sensor is determined to be defective and information related to the functionality of the temperature sensors (7 , 8, 9, 10) is output and / or stored.

Description

technical field [0001] The invention relates to a method according to the preambles of the independent claims. Background technique [0002] Various methods for evaluating the function of temperature sensors are known from the prior art. For example, methods are known for comparing the measurement signal of a first temperature sensor with the measurement signal of a second temperature sensor in a defined operating state. In this method, an error is found when two measured signals differ by a certain value. For example, methods are known in which the estimated temperature is compared with the measured temperature in a predetermined steady state. In such methods, errors are found when the differences between the compared temperatures are too large. Contents of the invention [0003] The task of the present invention is to overcome the disadvantages of the prior art. In particular, the object of the invention is to provide a method by which a quick, simple and precise fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF02D41/222F01N11/005G01K15/007F02D2200/0804G01K2205/04F01N2560/06F01N2900/1404F01N2560/14F01N2550/00F01N2900/0418Y02T10/40F02D41/1441F02D41/1446F02D2200/0802F02D2400/08F02D2041/228
Inventor 马里奥·德·蒙特B·布瑞特戈
Owner AVL LIST GMBH