Supercharge Your Innovation With Domain-Expert AI Agents!

Method for diagnosing rationality of engine exhaust temperature sensor

A technology of exhaust gas temperature and diagnosis method, which is applied to the diagnosis device of exhaust gas treatment device, exhaust gas treatment, engine components, etc., can solve the problems of high complexity, high cost, inappropriate use, etc. simple method effect

Active Publication Date: 2022-04-15
DONGFENG COMML VEHICLE CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is complex and costly, and is not suitable for use in vehicles

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for diagnosing rationality of engine exhaust temperature sensor
  • Method for diagnosing rationality of engine exhaust temperature sensor
  • Method for diagnosing rationality of engine exhaust temperature sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for diagnosing the rationality of an engine exhaust temperature sensor, which establishes an engine combustion model, an exhaust manifold heat dissipation model, a supercharger energy conversion model, and a supercharger heat dissipation model, and calculates exhaust gas by chemical combustion, thermal conversion, and heat conduction principles. The exhaust gas temperature model value is subtracted from the exhaust gas temperature model value and the exhaust gas temperature measured value obtained by the exhaust temperature sensor to obtain the exhaust gas temperature difference. If the exhaust gas temperature difference is outside the preset combustion temperature threshold, the exhaust gas The air temperature sensor is not reasonable.

Embodiment 2

[0026] A method for diagnosing the rationality of an engine exhaust temperature sensor, which establishes an engine combustion model, an exhaust manifold heat dissipation model, a supercharger energy conversion model, and a supercharger heat dissipation model, and calculates exhaust gas by chemical combustion, thermal conversion, and heat conduction principles. The exhaust gas temperature model value is subtracted from the exhaust temperature model value and the exhaust temperature measured value obtained by the exhaust temperature sensor to obtain the exhaust temperature difference. If the exhaust temperature difference is within the set combustion temperature threshold, the engine Data, when the engine load increases within the preset time, detect the exhaust temperature obtained by the exhaust temperature sensor, if the exhaust temperature decreases, the exhaust temperature sensor is unreasonable.

Embodiment 3

[0028] A method for diagnosing the rationality of an engine exhaust temperature sensor, which establishes an engine combustion model, an exhaust manifold heat dissipation model, a supercharger energy conversion model, and a supercharger heat dissipation model, and calculates exhaust gas by chemical combustion, thermal conversion, and heat conduction principles. The exhaust gas temperature model value is subtracted from the exhaust temperature model value and the exhaust temperature measured value obtained by the exhaust temperature sensor to obtain the exhaust temperature difference. If the exhaust temperature difference is within the set combustion temperature threshold, the engine Data, when the engine load increases within the preset time, detect the exhaust temperature obtained by the exhaust temperature sensor, if the exhaust temperature does not change, the exhaust temperature sensor is unreasonable.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of automobile engines, and discloses an engine exhaust temperature sensor rationality diagnosis method, which comprises the following steps: establishing an engine combustion model, an exhaust manifold heat dissipation model, a supercharger energy conversion model and a supercharger heat dissipation model, calculating an exhaust temperature model value through chemical combustion, thermal conversion and heat conduction principles, and calculating the engine exhaust temperature sensor rationality. And the exhaust temperature model value is subtracted from an exhaust temperature measured value obtained by the exhaust temperature sensor to obtain an exhaust temperature difference value, and if the exhaust temperature difference value is outside a preset combustion temperature threshold value, the exhaust temperature sensor is unreasonable. According to the engine exhaust temperature sensor rationality diagnosis method, rationality faults of the exhaust temperature sensor are effectively diagnosed.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a method for diagnosing the rationality of an engine exhaust temperature sensor. Background technique [0002] On some high-pressure common rail diesel vehicles, an exhaust temperature sensor will be equipped to detect the exhaust temperature in the converter, which can intuitively reflect the combustion status in the cylinder and be used for various controls of the after-treatment system. [0003] In order to detect whether the temperature of the exhaust gas temperature sensor is reasonable, generally compare the time ratio of the temperature of a certain engine exceeding the preset temperature with the time ratio of the temperature of this type of engine exceeding the preset temperature at the same torque level to judge the temperature rationality fault, and then The engine exhaust temperature is uploaded to a network platform through the network, and the state uses ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCY02T10/40
Inventor 夏可维胡国强赵金朋张洪泽陈雄
Owner DONGFENG COMML VEHICLE CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com