CN103573356B - Method and apparatus for running exhaust gas probe - Google Patents
Method and apparatus for running exhaust gas probe Download PDFInfo
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- CN103573356B CN103573356B CN201310299812.6A CN201310299812A CN103573356B CN 103573356 B CN103573356 B CN 103573356B CN 201310299812 A CN201310299812 A CN 201310299812A CN 103573356 B CN103573356 B CN 103573356B
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- detector
- exhaust gas
- temperature
- measuring chamber
- voltage
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- 239000000523 sample Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 56
- 239000002912 waste gas Substances 0.000 claims description 23
- 230000015654 memory Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 description 17
- 238000000746 purification Methods 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 230000033228 biological regulation Effects 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000000446 fuel Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 235000012364 Peperomia pellucida Nutrition 0.000 description 1
- 240000007711 Peperomia pellucida Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- -1 oxonium ion Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
-
- 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
- G01N27/4067—Means for heating or controlling the temperature of the solid electrolyte
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
- F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen
-
- 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
- F02D41/1494—Control of sensor heater
-
- 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
- G01N27/409—Oxygen concentration cells
-
- 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
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
-
- 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
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
-
- 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
- F01N2560/20—Sensor having heating means
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
-
- 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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
- G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure, temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0037—Specially adapted to detect a particular component for NOx
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention relates to the method for running the exhaust gas probe in the exhaust piping of internal combustion engine, exhaust gas probe has at least one heating element heater, for reaching the nominal temperature of the measuring chamber in exhaust gas probe, heating power is adjusted for the temperature of stably measured room, a detector voltage is determined by the electric wiring of measuring chamber.According to the present invention, generate the temperature independent output signal of exhaust gas probe, wherein, calculate the energy nernst voltage of measuring chamber in the first step by the detector internal resistance of measured detector voltage and measuring chamber, the energy nernst voltage of measuring chamber can be adjusted on the premise of no electric wiring, and the energy nernst voltage drawn from first step is converted into the energy nernst voltage in the case of nominal temperature in the second step, wherein, if the temperature of measuring chamber and the deviation very little of nominal temperature, then directly determine the energy nernst voltage in the case of nominal temperature.The invention further relates to apparatus for implementing the method.
Description
Technical field
The present invention relates to a kind of method for being used to run the exhaust gas probe in the exhaust piping of internal combustion engine, wherein, it is described
Exhaust gas probe has at least one heating element heater, for reaching the nominal temperature of the measuring chamber in the exhaust gas probe, and
And in order to stablize the temperature of the measuring chamber to adjust heating power, and determine one by the electric wiring of the measuring chamber
Detector voltage.
The invention further relates to a kind of apparatus for implementing the method.
Background technology
In order to reduce the discharge in the automobile with petrol engine, generally use ternary catalyzing unit fills as waste gas purification
Put, it only when air-fuel ratio λ is adjusted with high accuracy, just changes enough waste gas.Therefore, it is located at by one
Exhaust gas probe before the waste gas purification apparatus measures the air-fuel ratio λ.The pin of such waste gas purification apparatus
The storage capacity of oxygen is used in and receives oxygen in the thin stage and is released again in the dense stage.It is achieved in
, the oxidable pernicious gas composition of waste gas can be changed.Exhaust gas probe after the waste gas purification apparatus exists
It is used for the oxygen storage capacity for monitoring the waste gas purification apparatus in the case of this.The oxygen storage capacity must be in OBD
（OBD）Scope in be monitored because it shows a kind of chi of the transfer capability for the waste gas purification apparatus
Degree.In order to determine the oxygen storage capacity, otherwise the waste gas purification apparatus is added in a thin stage with oxygen first
Carry and then in a dense stage with one in the offgas known lambda value considering the situation of walked exhausted air quantity
Under emptied, or by the waste gas purification apparatus first in a dense stage by oxygen empty and it is then thin one
In stage with one in the offgas known lambda value be filled in the case where considering the exhausted air quantity walked.When positioned at described
It is described dilute when exhaust gas probe after waste gas purification apparatus detects the oxygen that can not be stored again by the waste gas purification apparatus
The thin stage terminates.Similarly, when the exhaust gas probe, which detects dense waste gas, walks, a dense stage is terminated.It is described
The oxygen storage capacity of waste gas purification apparatus is corresponded to during the dense stage for the reducing agent for being emptied and being supplied
Amount in other words during the thin stage for the amount of oxygen for being filled and supplying.Accurately amount is from useless positioned above
Calculated in the signal of gas detector and the exhaust mass stream tried to achieve from other sensor signals.
As exhaust gas probe, lambda detector is used in present motor control system.In the case, exist
A kind of lasting detector or also cry is distinguish between broadband lambda detector and a kind of two point form lambda sensor.
Lambda detector is based on an oxygen concentration cell with solid electrolyte.The solid electrolyte is typically at about 350 DEG C
Activationary temperature in the case of become to be conductive for oxonium ion.The nominal temperature of the detector is generally significantly higher,
Typically lie between 650 DEG C and 850 DEG C.The lambda detector ready for operation and meet a motor control system
The temperature in the case of requirement in system is between the activationary temperature and the nominal temperature of the detector.According to existing skill
The broadband lambda detector and its structure of art are for example described in the A1 of DE 10 2,008 042 268.
Once the detector ready for operation, then the detector signal can be used for regulation and diagnostic purpose.Especially
It is that the detector that only in this way can just utilize ready for operation activates the lambda regulation.Because the La Mu of activation
The reduction of discharge of poisonous waste is result in up to regulation, therefore the ready for operation state of the lambda detector is as fast as possible
Fastly reach after motor starts.
For this reason, the detector is generally by electrical heating on one's own initiative.The lambda detector has for this purpose
One electrical heating elements, it is manipulated by a controller.It is typically a kind of that there is an integrated platinum heating element heater made of zirconium oxide
Sensor element.
The detector heating is generally manipulated as follows so that the nominal ceramic temperature is as far as possible consistently
And independently occur with service condition.The stabilization of ceramic temperature is for the detector signal, that is detector
It is conclusive for voltage or the accuracy of the lambda signal and the quality of lambda regulation, the stabilization is again
With directly affecting for fuel consumption and discharge of poisonous waste.
Certainly the deviation of actual ceramic temperature and the nominal temperature can not be usually avoided in practice, such as detecting
The high-temperature heating of device（Hochheizen）In the case of, with the dynamic of high exhaust mass stream and EGT gradient
In the case of running operation or the ceramic temperature it is purposive be raised and lowered in the case of.This and mark
Claim the deviation of temperature to distort the detector signal and the fuel consumption improved and the discharge improved may be caused.
The distortion of the detector signal is produced by two material impacts：On the one hand the energy of detector not connected up this
Special voltage is related to temperature.On the other hand generally for the identification detector ready for operation state and for examining
Used by disconnected purpose, the electric wiring of detector result in measured detector voltage and the detector and temperature phase
The correlation of the internal resistance of pass.Therefore, value, such as lambda value are equally and temperature phase derived from measured detector voltage
Close.
The content of the invention
Therefore the task of the present invention is, proposes a kind of method, can be provided using this method a kind of warm with the ceramics
Spend unrelated detector signal.
The task of the present invention also resides in, and proposes a kind of corresponding apparatus for carrying out this method.
Being related to this method of the task solves in the following way, that is, generates the temperature independent defeated of the exhaust gas probe
Go out signal, wherein, counted in the first step by the detector internal resistance of measured detector voltage and the measuring chamber
Calculate the energy nernst voltage that can occur on the premise of no electric wiring of the measuring chamber, and in the second step will be from
The energy nernst voltage drawn in first step is converted into the energy nernst voltage in the case of nominal temperature, wherein, if described
The deviation very little of the temperature of measuring chamber and the nominal temperature, then directly this spy of energy of the determination in the case of nominal temperature is electric
Pressure.The temperature independent output signal of the exhaust gas probe do not distorted in the following operation phase yet for use,
In these operation phase, the actual ceramic temperature of the measuring chamber and the nominal temperature have deviation.In dynamic traveling fortune
In the case of row or in the case of detector heating described in inaccurately regulation or pre-control, the ceramic temperature and the mark
The deviation of temperature is claimed not influence the output signal according to the present invention of the detector.In the case, in order to stablize the survey
The temperature of room is measured, generally adjusts the heating power.But the regulation is not Compulsory Feature.Completely it is contemplated that only described spy
Survey the pre-control of device heating.When the exhaust gas probe may be heated only via the waste gas of heating, this method even can be with
The exhaust gas probe of electric heater is used without to apply.
Can be arranged in the case, electric wiring output end with one analog to digital-converter（ADC）Shape
Formula determines detector voltage.In the case, the output voltage of the parallel circuit of two voltage sources is measured, that is, it is reverse to produce one
Voltage and the voltage source being integrated in a control unit, and the voltage source of the measuring chamber of the exhaust gas probe.By ADC
The signal of the exhaust gas probe can be converted into corresponding data signal to further handle.
When the energy nernst voltage drawn from first step to the conversion of the energy nernst voltage in the case of nominal temperature
During by a calculation formula or by one or more characteristic curves to implement, relatively small implementation cost is obtained.Borrow
Characteristic curve is helped to show more complicated association functionally, if necessary under the different service conditions of internal combustion engine
Association functionally and calculate when pay attention to.
In the case, a kind of preferable method modification is, the exhaust gas probe according to foregoing claim
The output signal corrected is used for lambda and determines and/or adjusted for lambda.Therefore it can realize and more accurately draw nurse
Up to regulation.Therefore the on-condition of the lambda regulation less can be designed limitedly.Therefore, lambda regulation can be with
More frequently enter line activating, this helps to reduce fuel consumption and discharge of poisonous waste.The ceramic temperature for example for examining
The output signal for not influenceing the detector is raised and lowered in the purposive of disconnected purpose.Thus also it can improve or improve
The quality and activation frequency of the lambda regulation.
In the case, the corrected output signal of the exhaust gas probe is especially in the height of the exhaust gas probe
Temperature be heated to reaching the nominal temperature before in the case of use, thus, it is possible to realize swashing in advance for the lambda regulation
It is living.
In a kind of preferable method modification, using broadband lambda detector or two point form lambda detector as useless
Gas detector, it has corresponding heating element heater.It is of special importance that it is in order to optimal in the case of the exhaust gas probe
Function is particularly rapidly heated at high temperature in its optimal running temperature.It can be arranged in the case, in internal combustion engine
Each in the lambda detector built in exhaust steam passage is transported with the modifications of the method introduced and these methods
OK.This method may apply to other exhaust gas probes with the output signal related to temperature in principle（Such as NOx-
Sensor）Or on gas sensor.Such gas sensor can also be built in other positions, such as in air inlet pipe
In road.Especially with TSP protective layers（Thermal shock protection）Exhaust gas probe in the case of, can utilize according to the present invention
Method realize that the cold discharge of internal combustion engine greatly reduces.
The purpose for being related to described device solves in the following way, i.e. the controller for motor of described control unit or higher level
With the method and its computing unit of modification for implementing to describe before, the waste gas can be generated using the computing unit
The temperature independent output signal of detector.In the case, described control unit can be the higher level together with its part
Controller for motor integrated part.In the case, the functional characteristic of methods described can at least part ground
Implement in the controller for motor of described control unit or higher level in software.
Implement modification a kind of preferable, the controller for motor of described control unit or the higher level have one or
Multiple indicatrix memories, can be from the measuring chamber before no electric wiring using the indicatrix memory
Put the energy nernst voltage determined in the energy nernst voltage that can occur in the case of the nominal temperature.Therefore even in multiple
Value can also be conversed in the case of miscellaneous association on the premise of without bigger implementation cost.Furthermore it is possible to given up with described
The running status of gas detector and/or the internal combustion engine is stored in relation to different characteristic curves, and these characteristic curves can be used
In being calculated.
Brief description of the drawings
The present invention is explained in detail by embodiment shown in accompanying drawing below.Wherein:
Fig. 1 shows the technological accumulation and inheritance that can apply the method according to the invention（Umfeld）Schematic diagram,
Fig. 2 shows the curve chart for a detector internal resistance and the correlation of a ceramic temperature,
Fig. 3 shows the curve chart for a detector voltage and the correlation of the detector internal resistance, and
Fig. 4 shows the curve chart for the detector voltage and the correlation of the ceramic temperature.
Embodiment
Fig. 1 diagrammatically illustrated with a petrol engine can use according to the present invention be used for an exhaust gas probe 15,
The technological accumulation and inheritance of the method for 17 signal transacting.Air is supplied to an internal combustion engine 10 and utilize via an air feeder 11
One air flow meter 12 determines the quality of the air.The air flow meter 12 may be embodied to hotting mask air
Mass flowmenter.The waste gas of the internal combustion engine 10 exports via an exhaust steam passage 18, wherein, along the flow direction of the waste gas
One waste gas purification apparatus 16 is set after the internal combustion engine 10.The waste gas purification apparatus 16 generally includes at least one catalysis
Device.
In order to control the internal combustion engine 10, a controller for motor 14 is set, on the one hand the controller for motor via
One fuel metering device 13 supplies fuel and on the other hand to described in controller for motor supply to the internal combustion engine 10
The signal of the signal of air flow meter 12 and the exhaust gas probe 15 being arranged in the exhaust steam passage 18 and another
The signal of the individual exhaust gas probe 17 being arranged in the exhaust output tube road 18.The exhaust gas probe 15 is in shown example
The middle lambda actual value for determining a Fuel-air-mixture supplied to internal combustion engine 10.The exhaust gas probe can be implemented
Into broadband lambda detector or lasting lambda detector.The exhaust gas probe 17 determines the waste gas purification apparatus
Waste gas component after 16.The exhaust gas probe 17 can be configured to transition formula detector or the detection of two point form lambda
Device.
The exhaust gas probe 15 has a measuring chamber as master unit, and the measuring chamber has an integrated heating unit
Part, the measuring chamber provide an output signal related to the oxygen content in the exhaust steam passage 18, and the output signal is used as
The input signal of lambda adjusting means.In the case, the measuring chamber may be embodied to this special room of energy.The lambda is adjusted
Regulating device is typically the part of the controller for motor 14.Correspondingly, instead of the exhaust gas probe 15 or additional
In the exhaust gas probe 15, the exhaust gas probe 17 can be connected to together with its heating element heater and its measuring chamber described
On controller for motor 14.
Explained below with being embodied as the example of the exhaust gas probe 17 of two point form lambda sensor according to the present invention's
Method.This method can also be reasonably applied on other exhaust gas probes with the output signal related to temperature.
Generally there is a voltage source in controller for motor 14 in other words in controller, itself and the exhaust gas probe 17
It is in parallel.The voltage source produce a constant backward voltage and with the exhaust gas probe 17 cold compared to one it is smaller in
Resistance.Because the exhaust gas probe 17 is also shown as a kind of voltage source in itself, therefore it is related to the parallel connection of two voltage sources.This is simultaneously
Join the output voltage of circuit by one analog to digital-converter（ADC）To measure and be this spy of the energy of the exhaust gas probe
Voltage 33（Referring to Fig. 3 and 4）It is overlapping with the backward voltage, wherein, the voltage with the voltage source of less internal resistance accounts for master
Lead status.In the case of cold detector, the detector has high internal resistance, so as to the backward voltage predominantly
Position.On the contrary, heat detector in the case of, the internal resistance is especially small, so as to the detector energy nernst voltage account for it is leading
Status.
Fig. 2 shows a detector internal resistance 21Ri and the correlation of a ceramic temperature 22 in a curve chart 20.One side
Face shows that the first characteristic curve 23 and another aspect for new detector show second for old detector
Characteristic curve 24.The also characteristically exemplified one nominal detector internal resistance 21 for being directed to 220 Ω in curve chart 20,
This corresponds approximately to 780 DEG C of ceramic temperature 22 in the case of new detector.In the case of old detector, the detection
Device internal resistance 21 corresponds approximately to 820 DEG C of ceramic temperature 22.Following for for the sake of simplification with detector internal resistance 21 and ceramic temperature
Man-to-man between 22 is associated as starting point.
Curve chart 30 shown in the method according to the invention reference picture 3 and 4 describes.Figure 3 illustrates a spy
Survey the correlation of device voltage 31 and the detector internal resistance 21 and figure 4 illustrates related with the ceramic temperature 22
Property, wherein, respectively illustrate one and be directed to for the curvilinear motion of ADC voltages 32 and one in dense mixture（With more than
The upper curve of 0.8V energy nernst voltage 33）And thin mixture（Lower song with the energy nernst voltage 33 less than 0.2V
Line）In the case of it is described can nernst voltage 33 curvilinear motion.
Detector voltage of the measurement at ADC in first step 34（ADC voltages 32）And detector internal resistance 21.Due to
The backward voltage is default by the electric wiring of the detector and is therefore known, therefore can calculate and not have
The energy nernst voltage 33 that can occur on the premise of having electric wiring.From the energy nernst voltage so tried to achieve in second step 35
33 set out, and obtain the energy nernst voltage 33 that in nominal internal resistance and therefore can occur in the case of nominal temperature.It is described nominal
Internal resistance corresponds to 200 Ω value in an example shown, and this corresponds to the nominal ceramics temperature in the case of new detector
780 DEG C of degree（Referring to the operating point 25 in Fig. 2）.This for example can be stored in by a calculation formula or by one or more
Characteristic curve in the controller or the controller for motor 14 is obtained.
Near the nominal temperature, when the electric wiring only has a minimum influence as usual there
When, first step can be given up when necessary.
Can be generally directed to following in energy nernst voltage 33 of the nominal internal resistance in other words in the case of nominal ceramic temperature
Functional characteristic uses, such as lambda calculates and lambda regulation, or only in the case of actual value and nominal value deviation
Use.
Claims (8)
1. for running an internal combustion engine（10）Exhaust steam passage（18）In exhaust gas probe（17）Method, wherein, it is described useless
Gas detector（17）With at least one heating element heater, for realizing the exhaust gas probe（17）In measuring chamber nominal temperature
Degree, and thermal power is adjusted in order to stablize the temperature of the measuring chamber, determine one by the electric wiring of the measuring chamber
Detector voltage（31）, it is characterised in that generate the exhaust gas probe（17）Temperature independent output signal, wherein,
In first step（34）In by means of the detector voltage that measures（31）With the detector internal resistance of the measuring chamber（21）Calculate
The energy nernst voltage that can occur on the premise of without electric wiring of the measuring chamber（33）, and in second step
（35）In will be from the first step（34）In the energy nernst voltage that draws（33）It is converted into the energy in the case of nominal temperature
Nernst voltage（33）, wherein, if the temperature of the measuring chamber and the nominal temperature deviation very little, are directly determined in institute
State the energy nernst voltage in the case of nominal temperature（33）.
2. in accordance with the method for claim 1, it is characterised in that in the electric cloth in the form of analog to digital-converter
The exit of line determines the detector voltage（31）.
3. according to the method described in claim 1 or 2, it is characterised in that from the first step（34）In the energy that draws this is special
Voltage（33）To the energy nernst voltage in the case of nominal temperature（33）Conversion by a calculation formula or by
One or more characteristic curves are carried out.
4. according to the method described in claim 1 or 2, it is characterised in that the exhaust gas probe（17）According to foregoing right
Determine and/or adjusted for lambda it is required that the output signal corrected is used for lambda.
5. in accordance with the method for claim 4, it is characterised in that the exhaust gas probe（17）Corrected output signal
In the exhaust gas probe（17）Be heated at high temperature to reach before the nominal temperature in the case of be employed.
6. according to the method described in claim 1 or 2, it is characterised in that draw nurse using broadband lambda detector or two point form
Up to sensor as exhaust gas probe（17）.
7. for running an internal combustion engine（10）Exhaust steam passage（18）In exhaust gas probe（17）Device, wherein, it is described useless
Gas detector（17）With at least one heating element heater, for realizing the exhaust gas probe（17）In measuring chamber nominal temperature
Degree, and in order to stablize the temperature of the measuring chamber, thermal power can be adjusted, and can be by the electricity of the measuring chamber
Gas is connected up to determine a detector voltage（31）, it is characterised in that the controller for motor of control unit or higher level（14）Have
For implementing the computing unit of the method according to claim 1 to 6, the waste gas can be generated using the computing unit
Detector（17）Temperature independent output signal.
8. according to the device described in claim 7, it is characterised in that the controller for motor of described control unit or the higher level
（14）, can be from the measuring chamber not using the indicatrix memory with one or more indicatrix memories
The energy nernst voltage that can occur on the premise of with electric wiring（33）In determine in the case of the nominal temperature
Can nernst voltage（33）.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210212596 DE102012212596A1 (en) | 2012-07-18 | 2012-07-18 | Method for operating exhaust gas probe in exhaust passage of internal combustion engine of passenger car, involves generating temperature independent output signal of exhaust gas probe, and calculating Nernst voltage of measuring cell |
| DE102012212596.5 | 2012-07-18 |
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| Publication Number | Publication Date |
|---|---|
| CN103573356A CN103573356A (en) | 2014-02-12 |
| CN103573356B true CN103573356B (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310299812.6A Active CN103573356B (en) | 2012-07-18 | 2013-07-17 | Method and apparatus for running exhaust gas probe |
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| Country | Link |
|---|---|
| KR (1) | KR102028420B1 (en) |
| CN (1) | CN103573356B (en) |
| DE (1) | DE102012212596A1 (en) |
| FR (1) | FR2993601B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102013223731A1 (en) * | 2013-11-20 | 2015-05-21 | Robert Bosch Gmbh | Method and operation of a sensor evaluation unit and sensor evaluation unit |
| DE102014210442A1 (en) * | 2014-06-03 | 2015-12-17 | Robert Bosch Gmbh | Method for correcting a voltage-lambda characteristic |
| DE102016219560A1 (en) * | 2016-10-07 | 2018-04-12 | Continental Automotive Gmbh | Method for operating an amperometric sensor element and sensor element |
| DE102019206429A1 (en) * | 2019-05-03 | 2020-11-05 | Robert Bosch Gmbh | Method for determining an internal resistance of an electrochemical cell of a ceramic exhaust gas sensor |
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| US5129258A (en) * | 1988-10-21 | 1992-07-14 | Robert Bosch Gmbh | Method for determining temperature with the aid of the internal resistance of a lambda sensor |
| DE10036129A1 (en) * | 2000-07-25 | 2002-02-07 | Volkswagen Ag | Engine exhaust gas composition measurement for vehicle, involves estimating probe temperature based on internal resistance, and correction voltage from characteristic curve that relates actual voltage and temperature |
| DE10049685A1 (en) * | 2000-10-07 | 2002-04-11 | Volkswagen Ag | Process for single diagnosis of a nitrogen oxides sensor arranged in the exhaust gas line of an internal combustion engine comprises using a lambda signal characterizing the lambda value of the exhaust gas |
| DE102008005110A1 (en) * | 2008-01-15 | 2009-07-16 | Volkswagen Ag | Lambda sensor operating method for regulating fuel/air mixture ratio of combustion process of internal-combustion engine, involves determining correction value, where value is added to operating-reference value with correction value |
| CN101685078A (en) * | 2008-09-22 | 2010-03-31 | 罗伯特.博世有限公司 | Method for operating a heatable exhaust gas probe |
| CN102062795A (en) * | 2009-11-14 | 2011-05-18 | 大众汽车有限公司 | Method for processing a measured ohm resistance R(t) of a measuring element with temperature-dependent ohm resistance |
| CN102102567A (en) * | 2009-12-18 | 2011-06-22 | 罗伯特·博世有限公司 | Method and apparatus used for diagnosing the dynamic performance of a waste gas sensor. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010030117A1 (en) | 2010-06-15 | 2011-12-15 | Robert Bosch Gmbh | Circuit arrangement for operating a gas probe |
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2012
- 2012-07-18 DE DE201210212596 patent/DE102012212596A1/en active Pending
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2013
- 2013-07-17 CN CN201310299812.6A patent/CN103573356B/en active Active
- 2013-07-17 KR KR1020130084257A patent/KR102028420B1/en active IP Right Grant
- 2013-07-17 FR FR1357018A patent/FR2993601B1/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129258A (en) * | 1988-10-21 | 1992-07-14 | Robert Bosch Gmbh | Method for determining temperature with the aid of the internal resistance of a lambda sensor |
| DE10036129A1 (en) * | 2000-07-25 | 2002-02-07 | Volkswagen Ag | Engine exhaust gas composition measurement for vehicle, involves estimating probe temperature based on internal resistance, and correction voltage from characteristic curve that relates actual voltage and temperature |
| DE10049685A1 (en) * | 2000-10-07 | 2002-04-11 | Volkswagen Ag | Process for single diagnosis of a nitrogen oxides sensor arranged in the exhaust gas line of an internal combustion engine comprises using a lambda signal characterizing the lambda value of the exhaust gas |
| DE102008005110A1 (en) * | 2008-01-15 | 2009-07-16 | Volkswagen Ag | Lambda sensor operating method for regulating fuel/air mixture ratio of combustion process of internal-combustion engine, involves determining correction value, where value is added to operating-reference value with correction value |
| CN101685078A (en) * | 2008-09-22 | 2010-03-31 | 罗伯特.博世有限公司 | Method for operating a heatable exhaust gas probe |
| CN102062795A (en) * | 2009-11-14 | 2011-05-18 | 大众汽车有限公司 | Method for processing a measured ohm resistance R(t) of a measuring element with temperature-dependent ohm resistance |
| CN102102567A (en) * | 2009-12-18 | 2011-06-22 | 罗伯特·博世有限公司 | Method and apparatus used for diagnosing the dynamic performance of a waste gas sensor. |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2993601B1 (en) | 2018-05-18 |
| KR20140011283A (en) | 2014-01-28 |
| CN103573356A (en) | 2014-02-12 |
| DE102012212596A1 (en) | 2014-01-23 |
| KR102028420B1 (en) | 2019-10-04 |
| FR2993601A1 (en) | 2014-01-24 |
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