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Methods used to operate probes

A probe and pump current technology, applied in electrical control, instruments, machines/engines, etc., can solve problems such as aging, deterioration of measurement accuracy, and deterioration of internal combustion engine control

Active Publication Date: 2021-01-05
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these probes age during the course of continuous operation, i.e. the measurement accuracy deteriorates
This degradation would correspondingly lead to a degradation of the control of the entire internal combustion engine

Method used

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  • Methods used to operate probes
  • Methods used to operate probes
  • Methods used to operate probes

Examples

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Embodiment Construction

[0034] The following will refer to figure 1 Exemplary methods according to the invention are described. Reference is made here by way of example to an oxygen sensor arranged in the intake tract of an internal combustion engine. However, it should be clearly noted here that, for example, the method described herein can further be used with a nitric oxide sensor having a linear lambda probe measurement capability.

[0035] according to figure 1 , the method starts at step 100 and then reaches step 110 in which it is determined whether the internal combustion engine is in a predetermined modifiable operating state during which a modification to a characteristic of the oxygen sensor can be implemented. By way of example, in step 110 there is a query whether the internal combustion engine is in an overspeed cut-off phase or the engine is running continuously. During continuous engine operation, this change only occurs when the exhaust gas is almost free of nitrogen oxides at the...

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Abstract

The invention relates to a method for operating an internal combustion engine probe designed for determining the gas concentration of a gas mixture and comprising at least one pump electrode. The method has the steps of: controlling a first pump current (IP1) on said at least one pump electrode to regulate a first pump voltage (V1); controlling a second pump current (IP2 ) thereby adjusting a second pump voltage (V2) higher than said first pump voltage (V1); determining an aging factor for said probe based on said first pump current (IP1) and second pump current (IP2); and altering a characteristic of the probe based on the determined aging factor.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine probe implemented to determine the gas concentration of a gas mixture, said probe comprising at least one pump electrode and, in particular, to a A method of determining an aging factor and altering a property of a probe based on the determined aging factor. Background technique [0002] In order to determine the gas concentration of the gas mixture in an internal combustion engine, it is known to use specially implemented probes (eg oxygen or nitrogen oxide sensors) in order to be able to set the operating parameters of the internal combustion engine in an optimized manner. However, these probes age, ie the measurement accuracy deteriorates, during the course of the continuation of operation. This degradation would correspondingly lead to a degradation of the control of the entire internal combustion engine. [0003] The prior art has disclosed the modification of the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/417F02D41/24
CPCF02D41/123F02D41/144F02D41/1454F02D41/146F02D41/2474G01N27/4175F01N2560/025F01N2560/14
Inventor 张宏
Owner VTESCO TECH GMBH