CN110530951A - Method for diagnosing Abgassensor - Google Patents
Method for diagnosing Abgassensor Download PDFInfo
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- CN110530951A CN110530951A CN201910438237.0A CN201910438237A CN110530951A CN 110530951 A CN110530951 A CN 110530951A CN 201910438237 A CN201910438237 A CN 201910438237A CN 110530951 A CN110530951 A CN 110530951A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/41—Oxygen pumping cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/4163—Systems checking the operation of, or calibrating, the measuring apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/4175—Calibrating or checking the analyser
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/419—Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/04—Exhaust treating devices having provisions not otherwise provided for for regeneration or reactivation, e.g. of catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/20—Sensor having heating means
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Abstract
The present invention relates to a kind of diagnostic methods, determine by the diagnostic method: Abgassensor poisoning is not still poisoned.For this purpose, determining sensor performance.When the value of sensor performance is less than predetermined limiting value, Abgassensor is evaluated as being poisoned.
Description
Technical field
The present invention relates to a kind of methods for diagnosing Abgassensor.
Background technique
By the Abgassensor of the prior art, such as DE102009027276 A1 known electrochemistry.
Summary of the invention
The present invention is based on following cognitions: this Abgassensor may be poisoned by some substances (such as passing through sulphur),
The dynamic of the signal of Abgassensor is deteriorated as a result,.By according to the method for the present invention can be by the Abgassensor of poisoning
It is distinguished with the Abgassensor not being poisoned.
According to the method for the present invention more particularly to the diagnosis of the Abgassensor of electrochemistry, wherein Abgassensor has
First electrochemical cell, first electrochemical cell have first electrode and second electrode, which for example passes through diffusion
Barrier is connect with Abgassensor, and the second electrode is arranged in the inside of Abgassensor.First electrochemical cell
The first solid electrolyte with transmitting oxonium ion, first solid electrolyte are arranged between first electrode and second electrode.
In addition, Abgassensor has the second electrochemical cell, which has third electrode, the third electrode arrangement
Abgassensor inside and be connected to there with second electrode (kommunizieren), and the third electrode is for example
It is in the identical gas compartment with second electrode.In addition, the second electrochemical cell has the 4th electrode and transmitting oxonium ion
The second solid electrolyte, second solid electrolyte is arranged between third electrode and the 4th electrode.
Especially it is arranged, Abgassensor has third electrochemical cell, which has the 5th electrode, should
5th electrode arrangement Abgassensor inside and be connected to second electrode and third electrode, and the 5th electrode is for example
It is in the identical gas compartment with second electrode and third electrode.Third electrochemical pump battery, which has, to be arranged in reference gas
The 6th electrode, and the third electrochemical pump battery has the third solid electrolyte of transmitting oxonium ion, third solid electricity
Solution matter is arranged between the 5th electrode and the 6th electrode.
Especially it is arranged, Abgassensor has integrated heater.
Especially it is arranged, the time upper first first stage was set according to the method for the present invention, follows the first stage on the time
Second stage and phase III of second stage is followed on the time, wherein the first stage terminates at the first moment, wherein
Second stage starts at the first moment and terminates at the third moment, wherein the phase III starts at the third moment.First stage
Can start in zero moment, second stage may include the second moment, and the phase III may include the 4th moment and
Terminate at the 5th moment.
Especially it is arranged according to the present invention, the first pump voltage is applied on the first electrochemical cell, the first pump electricity
Oxonium ion is pumped out and/or pumps oxonium ion to exhaust gas by pressure --- depending on polarity --- from the inside of Abgassensor
The inside of sensor.
Especially it is arranged according to the present invention, so changes the first pump voltage in time, so that compared in the first phase,
In second stage at least on average by more oxonium ions pump to the inside of Abgassensor, and make in third
It compares in stage, at least on average pumps more oxonium ions to the inside of Abgassensor in second stage, and/or
Setting so changes the first pump voltage in time so that compared in the first phase, it is at least average in second stage and
Less oxonium ion is pumped out by speech from the inside of Abgassensor, and compared in the phase III, in second stage
In at least on average less oxonium ion is pumped out from the inside of Abgassensor, thus with neutralizing in the first stage
It is compared in three stages, in second stage, the oxygen concentration of the inside of Abgassensor is bigger.It certainly herein also include such as under type
And illustrated effect can be also realized in the following way: will be in oxonium ion pumping to Abgassensor in second stage
Portion, and in the first stage in and in the phase III oxonium ion is pumped out from the inside of Abgassensor.
Especially it is arranged according to the present invention, the second pump voltage is applied on the second electrochemical cell, which will
Oxonium ion pumps out from the inside of Abgassensor, so that measuring the second pump in the feed line to the second electrochemical cell
Electric current.
According to the present invention, especially the value of sensor performance is configured to now: by during second stage from the first moment
Electricity is pumped from the third moment to the 4th moment second with during the phase III to integral of second moment on the second pump electric current
The quotient that integral on stream is constituted.
It is arranged based on described value, when described value is less than predetermined limiting value, Abgassensor is evaluated as being poisoned,
And/or when described value is greater than predetermined limiting value, Abgassensor is evaluated as not being poisoned.
This method can especially occur in following ambient enviroment: in the ambient enviroment, the composition of exhaust gas does not become
Change or only very slowly changes.Therefore, this method can carry out during the idling of IC engine for being assigned Abgassensor.
Especially it is arranged according to the present invention, the period from the first moment to the second moment is 1 second to 8 seconds --- especially 3 seconds；
And the period from the third moment to the 4th moment is 2 seconds to 12 seconds --- especially 5 seconds；And predetermined limiting value is in
Between 4 to 9 --- especially there is value 6.5.
It especially can be set, measure the energy nernst voltage that is formed on third electrochemical cell and by the energy nernst voltage
It adjusts on predetermined expectation voltage, mode is: according to the difference change of measured energy nernst voltage and it is expected voltage the
One pump voltage, wherein in second stage, by than the predetermined expectation voltage of smaller value in the first phase, and the
In two-stage, pass through the predetermined expectation voltage of value more smaller than in the phase III.Expectation in first stage and phase III
Voltage for example can be 425mV；Expectation voltage in second stage for example can be 225mV.
If diagnosis obtains result --- Abgassensor poisoning can take regeneration measure, the mesh of the regeneration measure
: obtain the Abgassensor for being assessed as not being poisoned.On the other hand, if diagnosis has, result --- Abgassensor is not
Poisoning, then can be without regenerating measure.
Detailed description of the invention
Fig. 1 is illustratively illustrated in cross-section Abgassensor.
Fig. 2 is exemplarily illustrated the second pump electric current during the method.
Fig. 3 is shown by the sensor performance of differently pretreated Abgassensor.
Specific embodiment
The setting of Abgassensor 100 is for verifying having in conjunction with oxygen in admixture of gas (such as exhaust gas of internal combustion engine)
At least one share for measuring gas componant (being known as nitrogen oxide NOx to following exemplary), for this purpose, the Abgassensor includes
Sensor element 110, the first electrochemical cell 112 (pump battery), which includes first electrode 114 and second
The first solid electrolyte 117 of electrode 116 and construction between them.Here, by porous alumina layer 118 and with sensing
The first electrode 114 of the ambient enviroment separation of device 100 has first to be conductively connected 120, first is conductively connected by this, the first pump
Voltage UP1 can be applied on the first electrochemical cell 112 or the first pump electric current IP1 can be in the first electrochemical cell 112
Middle generation.For this purpose, the first conductive connection 120 is connect with the connecting pin P1 of external electrical control equipment 122.It is complete in order to obtain
Circuit, second electrode 116 equally have second to be conductively connected 124, which controls equipment
122 common connecting pin COM.First electrochemical cell 112 sticks on the first cavity 126, which is in sensing
The inside of device element 110 and with measurement gas connect.By generating the first pump electric current IP1 in the first electrochemical cell 112,
It can transmit between the first cavity 126 and the ambient enviroment (such as exhaust gas) of sensor 100 by the molecule in admixture of gas
The oxonium ion for the first share that oxygen is formed.In from ambient enviroment to the access path of the first cavity 126, there are diffusion barriers
128。
In addition, sensor element 110 has third electrochemical cell 130 (this special battery of energy), the third electrochemical cell
With the 5th electrode 132 and the 6th electrode 134.Third solid electrolyte 135 is disposed between the 5th electrode and the 6th electrode.
5th electrode 132 is for example conductively connected 124 by second together with second electrode 116 and connect with common connecting pin COM, and the
Six electrodes 134 have the individual conductive connection 136 of the connecting pin Vs to external electrical control equipment 122, allow to seek
The energy nernst voltage Vs being applied on third electrochemical cell 130.Third electrochemical cell 130 is sticked on reference on space 138.
Especially because the relatively low catalytic activity of second electrode 116, having of including in admixture of gas combines oxygen
Measure 140 (the NOx electricity of the second electrochemical cell that gas componant (nitrogen oxide NOx) substantially completely reaches sensor element 110
Pond).Second electrochemical cell 140 has third electrode 142 and the 4th electrode 144 and in the second solid between them
Electrolyte 143, and second electrochemical cell sticks on the second cavity 145 of the inside of sensor element 110.The two
The such configuration of at least one electrode in electrode 142,144, allows to when applying voltage, by catalytic action by measurement gas
Body ingredient NOx generates other molecular oxygen.
5th electrode 142 have guidance to common connecting pin COM conductive connection 146, and the 6th electrode 144 have lead
Electrical connection 146, by the conductive connection, the second pump voltage UP2 can be applied on the second electrochemical cell 140.For this purpose, leading
Electrical connection 146 is connect with the connecting pin P2 of external electrical control equipment 122.Second pump voltage UP2 is applied to the second electrochemistry
Cause to generate the second pump electric current IP2 on battery 140.The second pump electric current, which is used to verify in the normal operation of Abgassensor, to be surveyed
Measure gas componant.
In addition, sensor element 110 has heating element 148, which is set by the second feed line 150 with control
Standby 122 connecting pin HTR+ is connected with HTR-, heated current can be introduced into heating element 148 by these connecting pins,
Sensor element 110 can be placed in desired temperature by the heating element by the generation of heating power.
In time with the normal operation of Abgassensor (i.e. with verifying have in conjunction with oxygen measurement gas componant at least
One share) discretely, such as during the idle running of internal combustion engine (being disposed with Abgassensor 100 in its waste gas system), carry out
Method according to the present invention for diagnosing Abgassensor 100, illustratively illustrates the method referring now to Fig. 2.
This method is started in zero moment t0 with first stage I.In the first stage in I, on the first electrochemical cell 112
(nachbilden) first pump voltage UP1 is so simulated by regulating loop, so that measuring on third electrochemical cell 130
Energy nernst voltage Vs consistently there is value 425mV.Therefore, (in the cavity 126 and 145 of inside in Abgassensor 100
) oxygen concentration is very low, and although the second pump voltage UP2 is present on the second electrochemical cell 140, it is final resulting
Second pump electric current IP2 is equal to zero.It, can will if final resulting second pump electric current IP2 is not equal to zero in I in the first stage
The second pump electric current IP2 is construed to bias, and correspondingly so amendment second pumps electric current IP2 during the entire process, makes
The value being corrected of second pump electric current IP2 is in the first stage finally zero in I.
Terminate in the first stage I of the first moment t1, the method and is used to diagnose the second-order of Abgassensor 100
Section II starts.In second stage II, first pump voltage is so simulated by regulating loop on the first electrochemical cell 112
UP1, so that the energy nernst voltage Vs measured on third electrochemical cell 130 consistently has value 225mV.Abgassensor
(i.e. in cavity 126 and 145) oxygen concentration of 100 inside is accordingly bigger, and flows through the ion of the second electrochemical cell 140
Stream is corresponding bigger.As shown in FIG. 2, the second pump electric current IP2 jumps to high value at the second moment.In of short duration transient process
Later, the second pump electric current IP2 is maintained at high value in second stage II.In the example, the first moment t1 and place are sought
Principal value of integral after the first moment t1 between three seconds the second moment t2 on the second pump electric current IP2, and detect final
Resulting value I1.
Later in third moment t3, second stage II terminates and phase III III starts.In the phase III, In
First pump voltage UP1 is so simulated by regulating loop again on first electrochemical cell 112, so that in third electrochemical cell
The energy nernst voltage measured on 130 consistently has value 425mV.Therefore, (i.e. 126 He of cavity of the inside of Abgassensor 100
In 145) oxygen concentration is re-lowered to low-down value, and after transient process, the second pump electric current IP2 (exists when necessary
After subtracting the biasing sought in I in the first stage) it is zero.In this example, it seeks third moment t3 and is in the third moment
In the value of the second pump electric current IP2 upper integral between five seconds the 4th moment t4 after t3, and detect final resulting value I2.The
Fiveth moment t5 of the three stage III after the 4th moment t4 terminates.
Sensor performance SPI is calculated as quotient I1/I2, that is, be calculated as by during second stage II from the first moment t1 to
Second moment t2 second pump electric current IP2 on integral I1 with during phase III III from third moment t3 to the 4th moment
The quotient that integral I2 of the t4 on the second pump electric current IP2 is constituted.
If sensor performance SPI is less than or equal to 6.5, Abgassensor 100 is evaluated as being poisoned；Otherwise by exhaust gas
Sensor evaluation is not to be poisoned.
If Abgassensor 100 is evaluated as being poisoned, regeneration measure is carried out, the purpose of the regeneration measure is: obtaining quilt
It is evaluated as the Abgassensor 100 not being poisoned.
Otherwise, without specific action.
In an experiment, referring to Fig. 3, made in total 34 Abgassensors 100 experienced diagnosis side according to the present invention
Method.
First group (by described by letter A in Fig. 3) in sensor is in new state.As described above, as biography
Sensor performance SPI measures the value between 7 to 8.5.It is inferred to, these sensors are not poisoned.
In the waste gas system of the internal combustion engine of conventional operation, second group in sensor is set (to pass through letter b institute in Fig. 3
Description) aging 50 hours.Then, as described above, measuring the value between 8 to 10 as sensor performance SPI.It is inferred to, this
A little sensors are not poisoned equally.
The third group (by described by letter C in Fig. 3) of sensor is contacted into 10 small durations with the compound of sulfur-bearing.With
Afterwards as described above, measuring the value between 4 to 5 as sensor performance SPI.It is inferred to, these Sensor Poisonings.Then, may be used
To regenerate these sensors by adequate measures.
Claims (7)
1. a kind of method of the Abgassensor (100) for diagnosing electrochemistry, wherein the Abgassensor (100) has
First electrochemical cell (112), first electrochemical cell have first electrode (114) and a second electrode (116), and described the
One electrode is connected to exhaust gas, and the second electrode is arranged in the inside (126) of the Abgassensor (100), and described
One electrochemical cell has the first solid electrolyte (117) of transmitting oxonium ion, and first solid electrolyte is arranged in described
Between first electrode and the second electrode (114,116), wherein the Abgassensor (100) has the second electrochemical pump
Battery (140), the second electrochemical pump battery have third electrode (142) and the 4th electrode (144), the third electrode cloth
It sets the inside in the Abgassensor and is connected to there with the second electrode (116), and second electrochemistry
The second solid electrolyte (143) that battery has transmitting oxonium ion is pumped, second solid electrolyte is arranged in the third electricity
Between pole and the 4th electrode (142,144)；Wherein, the time upper first first stage (I) was arranged, on the time in the method
Follow the second stage (II) of the first stage and on the time followed by the phase III of the second stage (II)
(III), wherein the first stage (I) terminates at the first moment (t1), wherein the second stage (II) is described first
Moment (t1) starts and terminates at third moment (t3), wherein the phase III (III) is opened in the third moment (t3)
Begin；Wherein, the first pump voltage (UP1) is applied on first electrochemical cell (112), first pump voltage by oxygen from
Son comes out from the pumping of the inside (126) of the Abgassensor (100) and/or pumps oxonium ion to the Abgassensor
(100) inside (126), wherein so change first pump voltage (UP1) in time, so that in first rank
It is compared in section (I), at least more oxonium ions is pumped to the exhaust gas on average in the second stage (II) and are sensed
The inside (126) of device (100), and make compared in the phase III (III), in the second stage (II) extremely
It is few that more oxonium ions are pumped into the inside (126) to the Abgassensor (100) on average, and/or, wherein when
Between on so change first pump voltage (UP1) so that compared in the first stage (I), in the second stage
(II) at least by less oxonium ion, from the inside (126) of the Abgassensor (100), pumping is come out on average in, and
Compared in the phase III (III), in the second stage (II) at least on average by less oxonium ion from
Inside (126) pumping of the Abgassensor (100) comes out, thus in the first stage (I) and in the third
It is compared in stage (III), in the second stage (II), the oxygen concentration of the inside (126) of the Abgassensor is bigger；Its
In, the second pump voltage (UP2) is applied on second electrochemical cell (140), second pump voltage by oxonium ion from
Inside (145) pumping of the Abgassensor (100) comes out, so that in the feed to second electrochemical cell (140)
The second pump electric current (IP2) is measured in line (146)；Wherein, the value of sensor performance (SPI) is configured to: by described second
Integral (I1) during stage (II) from first moment (t1) to the second moment (t2) on second pump electric current (IP2)
Electric current is pumped from the third moment (t3) to the 4th moment (t4) described second with during the phase III (III)
(IP2) quotient that the integral (I2) on is constituted；Wherein, when the value of the sensor performance (SPI) is less than predetermined limiting value,
The Abgassensor (100) is evaluated as being poisoned, and/or, when the value of the sensor performance (SPI) is greater than predetermined pole
When limit value, the Abgassensor (100) is evaluated as not being poisoned.
2. the method according to claim 1, wherein from first moment (t1) to second moment (t2)
Period be 3 seconds, and from the third moment (t3) to period of the 4th moment (t4) be 5 seconds, and it is described
Predetermined limiting value has value 6.5.
3. method according to claim 1 or 2, which is characterized in that the Abgassensor (100) has third electrochemistry
Battery (130), the third electrochemical cell have the 5th electrode (132) and the 6th electrode (134), the 5th electrode arrangement
The Abgassensor (100) inside (145) and with the second electrode and the third electrode (116,142) even
Logical, the 6th electrode arrangement is in reference gas, and the third electrochemical cell has the third of transmitting oxonium ion solid
Body electrolyte (135), the third solid electrolyte be arranged in the 5th electrode and the 6th electrode (132,134) it
Between, wherein it measures the energy nernst voltage (Vs) formed on the third electrochemical cell (130) and this is special electric by the energy
Pressure is adjusted onto predetermined expectation voltage, and mode is: according to measured energy nernst voltage (Vs) and the expectation voltage
Difference change first pump voltage (UP1), wherein compared in the first stage (I), at the second stage (II)
In by the predetermined expectation voltage of smaller voltage, and compared in the phase III (III), described second
Pass through the predetermined expectation voltage of smaller voltage in stage (II).
4. according to the method described in claim 3, it is characterized in that, in the first stage and (III) the phase phase III
Between, predetermined expectation voltage is 425mV, and during the second stage (II), predetermined expectation voltage is
225mV。
5. method according to any one of the preceding claims, which is characterized in that during the method, by integrated
The Abgassensor (100) is heated in running temperature by heater (148).
6. method according to any one of the preceding claims, which is characterized in that be assessed as in Abgassensor (100)
In the case where poisoning, regeneration measure is taken, the purpose of the regeneration measure is: obtaining the Abgassensor for being assessed as not being poisoned
(100)。
7. method according to any one of the preceding claims, which is characterized in that poisoning is occurred by sulphur, and described
Regeneration measure is inter alia, in that go sulphur removal from the Abgassensor (100).
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| DE102018208317.7A DE102018208317A1 (en) | 2018-05-25 | 2018-05-25 | Method for diagnosis of exhaust gas sensors |
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| CN110872978A (en) * | 2018-09-04 | 2020-03-10 | 罗伯特·博世有限公司 | Method for detecting poisoning of an exhaust gas sensor |
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| DE102018208317A1 (en) | 2019-11-28 |
| FR3081555A1 (en) | 2019-11-29 |
| CN110530951B (en) | 2023-06-06 |
| FR3081555B1 (en) | 2022-08-05 |
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