Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus used for diagnosing the dynamic performance of a waste gas sensor.

A technology of an exhaust gas sensor and a diagnostic device, which is applied to the diagnostic device of the exhaust gas treatment device, the exhaust device, the electronic control of the exhaust gas treatment device, etc., which can solve the problems of large deviation of duration extension and cycle duration extension, etc., and achieve Good OBD Effects

Active Publication Date: 2015-02-04
ROBERT BOSCH GMBH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through a large number of experiments, it is found that the slowdown of the detector under different regulator designs, system states and operating points will lead to a cycle duration extension with a large deviation from the actual cycle duration extension

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 and apparatus used for diagnosing the dynamic performance of a waste gas sensor.
  • Method and apparatus used for diagnosing the dynamic performance of a waste gas sensor.
  • Method and apparatus used for diagnosing the dynamic performance of a waste gas sensor.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] In the two-point control algorithm, the lambda in the exhaust gas swivels between two predefined limit values. If lambda reaches the lower limit value assigned to the rich air-fuel mixture, the two-point control algorithm adjusts the fuel metering device of the internal combustion engine and the controller setting value of the throttle device in such a way that the air-fuel ratio is changed to a lean adjustment , That is, excessive air is carried out. If lambda thus reaches the upper limit value assigned to the lean air-fuel mixture, the two-point control algorithm adjusts the fuel measuring device and the regulator setting value of the throttle device in such a way that the air-fuel ratio changes to a richer Adjustment, ie excess fuel, takes place. The speed of changeover between lean and rich control then depends on the selected control variable, the control range and the dynamics of the exhaust gas sensor. However, with a given control parameter and a given control...

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

#CMT# # / CMT# The method involves calculating time period duration (17) of lambda regulator (1) for diagnosing dynamic nature. The regulated value regulated by lambda is pre-set to the lambda regulator. The lambda regulation is determined by the regulator static time (15,16) of the regulator design during diagnosis period. The corrected time period duration is determined. #CMT# : # / CMT# An independent claim is included for device for diagnosing dynamic nature of waste gas sensor. #CMT#USE : # / CMT# Method for diagnosing dynamic nature of waste gas sensor e.g. two-point lambda sensor installed in waste gas channel of internal combustion engine. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows a graph illustrating the process of diagnosing dynamic nature of waste gas sensor. 1 : Lambda regulator 10 : Regulator output signal 15,16 : Static time 17 : Time period duration 20 : Detector voltage.

Description

technical field [0001] The invention relates to a method for diagnosing the dynamics of an exhaust gas sensor designed as a two-point lambda probe, which is arranged in the exhaust gas duct of an internal combustion engine and with which the supply to the internal combustion engine is regulated via a lambda regulator The air-fuel ratio of the gas mixture for which the cycle duration of the lambda controller is evaluated for diagnosing the dynamics of the exhaust gas sensor. [0002] The invention also relates to a device for carrying out the method according to the invention. Background technique [0003] Lambda regulation combined with a catalytic converter is currently the most effective exhaust gas purification method for fast combustion engines. Very low exhaust gas values ​​can only be achieved in conjunction with the currently available ignition and injection systems. [0004] It is particularly effective to use a three-way catalytic converter or a selective catalyti...

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 Patents(China)
IPC IPC(8): F01N11/00
CPCF01N2560/025F02D2041/1431F02D41/1495F02D41/222Y02T10/40F02D41/1454F02D41/1474
Inventor K·韦迈尔M·普费尔褚思芸A·克莱门特
Owner ROBERT BOSCH GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com