CN102003295B - Method for managing exhaust gas probe and device for performing the method - Google Patents
Method for managing exhaust gas probe and device for performing the method Download PDFInfo
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- CN102003295B CN102003295B CN201010271401.2A CN201010271401A CN102003295B CN 102003295 B CN102003295 B CN 102003295B CN 201010271401 A CN201010271401 A CN 201010271401A CN 102003295 B CN102003295 B CN 102003295B
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- 239000000523 sample Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 62
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 239000002912 waste gas Substances 0.000 claims description 46
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 31
- 230000033228 biological regulation Effects 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 17
- -1 oxygen ions Chemical class 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-O oxonium Chemical compound [OH3+] XLYOFNOQVPJJNP-UHFFFAOYSA-O 0.000 claims description 5
- 230000037427 ion transport Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 14
- 239000003570 air Substances 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 108010083687 Ion Pumps Proteins 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
The invention proposes a method for managing heated exhaust gas probe (14). The probe is arranged in an exhaust part (12) of an internal combustion engine (10). During the measurement operating process, pumping signals (SP,UP,IP) are supplied on pump electrodes (18,20) of a pump unit (16) of the exhaust gas probe (14), the oxygen ion transporation in the pump unit (16) is realized by the signals. The invention also proposes a device for performing the method, characterized in that: in the given operation preparation of the exhaust gas probe (14), the exhaust probe (14) is heated to a named temperature (te-soll) and during the operation of the internal combustion engine (10), if in no need for the measurement signal (UN) of the exhaust probe (14), at least the pumping signals (SP,UP,IP) are sometime cut off depending on the operation state (KI,Lim-%O2,n,L) of the internal combustion engine (10).
Description
Technical field
The present invention relates to a kind of method for making exhaust gas analyzer probe run, this Probe arrangement in the waste gas position of internal-combustion engine, and relates to a kind of device for implementing the method.
Purport of the present invention is also a kind of computer program and a kind of computer program.
Background technique
In DE199 41 051 A1, describe a kind of wide band lambda probe, it has a measuring chamber, and this measuring chamber is contacted by diffusion barrier and waste gas.In transducer room, arrange an internal pump electrode, it forms a pump unit with the electrolyte of an external pump electrode and a conduct oxygen ions between pump electrode.Can make oxonium ion by electrolyte from pumping measuring chamber out or pump in measuring chamber with this pump unit.Have a measuring unit on pump unit side, this unit, between internal pump electrode and a reference gas electrode, wherein equally also arranges a kind of electrolyte of conduct oxygen ions between internal pump electrode and a reference gas electrode.Measuring unit is equivalent to this special unit of an energy, in this unit when thermodynamical equilibrium, at internal pump electrode with reference to the potential difference formed between gas electrode, proportional with the logarithm of the ratio of the dividing potential drop of the gas that will test in air reference with the partial pressure of the gas that will test in measuring chamber.The object measuring waste gas λ is: affect the oxygen partial pressure in measuring chamber like this, thus enable Si Te-current potential remains on the value of a regulation consistently, and this value is preferably equivalent to λ=1.Line arrangement is for ensureing that pump electric current can flow.Polarity and the numerical values recited of pump electric current depend on, exceeding or lower than great value by Si Te-current potential of regulation.The pump electric current produced is a yardstick of waste gas λ.
In DE 10 2,004 061 355 A1, describe a kind of method for making to be arranged in the wide band lambda probe in a waste gas position of internal-combustion engine and to run, this probe not only contains a pump unit but also has a measuring unit.Line unit regulates the pump electric current flowing through pump unit like this, thus in measuring unit, produce a kind of energy Si Te-voltage of regulation.Pump electric current is a yardstick of air-fuel ratio in waste gas.Can the reliable detection of Si Te-voltage reach by the following method: temporarily disconnect pump electric current when measuring, thus make measuring unit when disconnecting on pump current loop not stand under load.The disconnection of pump electric current is just temporarily carried out, thus ensure that the adjustment of pump electric current.
A kind of method for making to be arranged in the wide band lambda probe in a waste gas position of internal-combustion engine and to run is also illustrate that equally in DE 102 16 724 C1, a pump voltage is added with in this method on the pump unit of λ probe, this voltage can Si Te-voltage and regulating according to what occur on measuring unit, and produce a positive or negative pump electric current according to the oxygen content in waste gas at pump unit.In order to also in the running of internal-combustion engine weak mixture, fill spray fashionable at a kind of fuel, keep the measurement sensistivity of wide band lambda probe, fill spray at fuel and fashionablely repeatedly make the pump voltage reverse of polarity, thus sometimes there is a pump voltage, this voltage makes oxonium ion pump in measuring unit, and it can make the oxidizing hydrocarbon produced because fuel fills spray into there.
In DE 4,321 243 A1, also illustrate that a kind of method for making to be arranged in the wide band lambda probe in a waste gas position of internal-combustion engine and to run equally, flowing through the pump current specification of pump unit in this method in a kind of scope of periodic duty.As long as energy Si Te-voltage that measuring unit occurs be less than threshold value, design makes pump voltage pump electric current disconnection in other words.Threshold value specifies like this, and the disconnection of pump voltage is occurred under operation, and the temperature of wide band lambda probe is also lower than a nominal temperature under such conditions, and when this nominal temperature, λ pops one's head in unripe operation.
In DE103 16 645 A1, describe a kind of device for making wide band lambda probe run, this device equally also existing pump unit has again a measuring unit.Be provided with a stabilized power source, it provides pump electric current, with this pump current load pump unit.Stabilized power source such as at least provides the pump electric current of two kinds of different sizes.Describe in addition and a kind ofly have the connection stage of alternation and the cycling service of disconnected phase, the endurance wherein in order to adjust average pump current turns ON stage or disconnected phase depends on specifying by Si Te-voltage of occurring on measuring unit.The disconnection of pump electric current, according to principle, just occurs in periodic duty scope when off state.Not longer to pump electric current disconnection is described.
In DE 101 63 912 A1, also illustrate that a kind of wide band lambda probe be arranged in the waste gas position of internal-combustion engine equally, this probe is containing a pump unit and a measuring unit.According to a kind of embodiment's pump current cycle reverse of polarity.Polarization in the ceramic body that dipole inversion should make λ pop one's head in reduces, and the impact avoiding probe signal to be caused thus.Alternatively embodiment, can design and disconnect in internal combustion engine operation rest periods chien shih pump voltage.Probe heating equipment can be made to work on simultaneously, or make it disconnect to save the energy.Can also design in DE 4,321 243 A1 as described in the above, when the temperature of λ probe is too low, pump voltage be disconnected.
Summary of the invention
Run for making an exhaust gas analyzer probe being arranged in the heating in a waste gas position of internal-combustion engine according to mode of the present invention, a pump signal is provided to the pump electrode of exhaust gas analyzer probe pump unit wherein at measurement run duration, this signal can be implemented in the oxonium ion transport in pump unit, it is characterized in that, when the given operation of exhaust gas analyzer probe is awaited orders, now exhaust gas analyzer probe is heated to a nominal temperature, and when internal combustion engine operation, if do not need the measurement signal of exhaust gas analyzer probe, pump signal is cut off time so with regard to depending on that the running state of internal-combustion engine has at least.
The load that during avoiding according to mode of the present invention the running state specified at internal-combustion engine, exhaust gas analyzer probe is high, and therefore prevent the aging of exhaust gas analyzer probe.
The running state that at least sometimes can disconnect pump signal of internal-combustion engine is such running state, can abandon the measurement signal provided by exhaust gas analyzer probe under this running state for the moment.Implementing a kind of operation having control of internal-combustion engine when cancelling measurement signal, replacing a kind of modulated operation.
As the special running state of internal-combustion engine, under these running statees, pump signal should be disconnected, and especially can specify such running state, they or cause high oxygen concentration and/or cause pressure high in exhaust steam passage.
Especially λ probe or NO is designed to as exhaust gas analyzer probe
x-probe.Oxygen content high in waste gas position in such probe causes high pump signal, and this signal causes the high capacity of the pump electrode to pump unit.High pressure in this external waste gas position causes the respective load of the pump electrode to pump unit.
The high capacity of the pump electrode of pump unit can make harmful substance easily enter in pump unit, and these harmful substances may cause the poisoning of exhaust gas analyzer probe, until destroy.This negative effect is by avoiding largely according to mode of the present invention.
Thus the life requirements to exhaust gas analyzer probe can be expanded according to mode of the present invention.
According to favourable Curve guide impeller and the visible dependent claims of design proposal of mode of the present invention.
The first design proposal specifies: be disconnected when pump signal has at least, if the oxygen concentration in waste gas position has exceeded an oxygen concentration threshold value.High oxygen concentration in waste gas position is especially for a kind of λ probe or for a kind of NO
x-probe, cause a kind of high pump signal, this signal causes the high capacity of the pump electrode to pump unit, and this is avoided by favourable design proposal.High oxygen concentration in waste gas position is understood to the running state of internal-combustion engine according to the present invention.
Another design proposal defines: be disconnected when pump signal has at least, if internal-combustion engine is in when being disconnected fuel input slide operation.This design proposal has with the first design proposal intersects, because when internal-combustion engine slides operation, usually in waste gas position, occur high oxygen concentration, it can reach 21% always, corresponding to the oxygen concentration in surrounding atmosphere.Pump signal can be made just to disconnect before reaching the high oxygen concentration in waste gas position the consideration of sliding operation.
Another kind of design proposal regulation: be disconnected when pump signal has at least, if internal-combustion engine runs under a kind of stable running state.In order to verify the existence of steady operational status, preferably consider rotating speed and the load of internal-combustion engine.
The Curve guide impeller of this design proposal defines: before pump signal is disconnected, and steady state must exist the minimum duration of operation of at least one regulation.
Another kind of design proposal regulation: be disconnected when pump signal has at least, if an exhaust gas valve be arranged in the waste gas position of internal-combustion engine closes.Such exhaust gas valve especially designs in the waste gas position of commercial car, and it is closed the braking action for strengthening motor.May occur the pressure raised in waste gas position when exhaust gas valve cuts out, this equally also may cause the high capacity of the pump electrode of pump unit.The position of exhaust gas valve closes a kind of running state according to the present invention being equally also internal-combustion engine in other words.
First relate to a kind of controller set up specially according to the device for implementing this method of the present invention, it includes the device implementing this method.
Controller especially includes a kind of running state and tries to achieve device for trying to achieve the running state of internal-combustion engine, and a kind of pump signal regulation device is used for providing pump signal for exhaust gas analyzer probe.
Controller preferably includes at least one electrical storage, wherein method step is stored as controller program.
Specify according to computer program of the present invention: be all implemented in steps, if it runs on a computer according to the institute of method of the present invention.
Have a kind of procedure code be stored in machine-readable carrier according to computer program of the present invention, it is implemented according to method of the present invention, if program is run on computers.
One embodiment of the present of invention are shown in accompanying drawing and also describe in detail in the following description.
Accompanying drawing explanation
Drawings illustrate the technology surrounding environment of the method for carrying out according to invention.
Embodiment
Drawings illustrate an internal-combustion engine 10, in its waste gas position 12, arrange an exhaust gas analyzer probe 14.Exhaust gas analyzer probe 14 includes a pump unit 16, and this pump unit arranges pump electrode 18,20, and one of them pump electrode 18 is subject to the effect of waste gas.Abgassensor 14 includes a measuring unit 22 in addition, this unit arranges potential electrode 24,26.
Between pump unit 16 and measuring unit 22, be provided with a measuring chamber 28, it is connected with waste gas by an air intake passage 30, wherein between air intake passage 30 and measuring chamber 28, arranges a diffusion barrier 32.An electrode 26 of measuring unit 22 is arranged in one with reference to air passageways 34 li.Be provided with a heating element 36 for heat exhaust gases probe 14.
In waste gas position 12, be provided with an exhaust gas valve 38, it adjusts drive unit 40 by a valve and handles, and the latter is triggered by a valve signal KI.
Abgassensor 14 provides measurement signal UN for controller 50.Controller 50 provides heating power HZ for heating element 36, and the pump electrode 18,20 for pump unit 16 provides a pump signal SP, and wherein this pump signal SP is a pump voltage UP pump electric current I P in other words.
Measurement signal UN is supplied to a measurement signal evaluating device 52, provide an oxygen concentration-threshold value Lim%_O2 in addition this device, and it provides an oxygen concentration-release signal FG%_O2, this signal is supplied to a pump signal regulation device 54.
Pump signal specifies that device 54 obtains a temperature release signal FG_te provided by heating-regulation device 56 in addition, an exhaust gas valve release signal FG_KI, an internal-combustion engine slides operation (Schiebebetrieb)-release signal FG_SA and stable operation-release signal FG_Sta, and provides pump signal SP as pump voltage UP pump electric current I P in other words.
Heating-regulation device 56 according to the nominal temperature te_Soll regulation heating power HZ of a dew point-move down terminal TPE and the heating element 36 according to Abgassensor 14, and provides temperature release signal FG_te.
Internal-combustion engine slides the rotating speed n that operation-release signal FG_SA and stable operation-release signal FG_Sta depends on internal-combustion engine 10, the load L of internal-combustion engine 10, minimum duration of operation ti_Min, rotating speed interpretational criteria Lim_n and load evaluate criterion Lim_L tries to achieve device 58 by a running state and provides.
Embodiment from the wide band lambda probe as exhaust gas analyzer probe 14, as it is such as in detail described in DE102 16 724 C1 listed by beginning or in DE199 41 051 A1.Another exhaust gas analyzer probe 14 can be such as a NO
x-probe.14 are popped one's head in for the wide band lambda in an embodiment, makes every effort to adjustment setting λ=1 in measuring chamber 28.Actual parameter as a regulating loop considers that this is in potential electrode 24, the measurement signal UN occurred between 26, and this signal is can nernst voltage UN in this embodiment.Precondition is: in measuring chamber 28, have a kind of stoichiometrical mixture, and is having ambient air with reference in air passageways 34, can reach about 450mV by nernst voltage UN.
A kind of stoichiometrical mixture oxygen concentration devious with measuring chamber 28 li, by pump electrode 18, add pump signal SP, and the transport of the therefore a kind of and possible oxonium ion in pump unit 16 overcomes on 20.Occur when oxygen is unnecessary to transport from the oxonium ion of measuring chamber 28 to waste gas, then occur when oxygen lacks to transport from waste gas to the oxonium ion of measuring chamber 28.Oxonium ion transport, by pump electrode 18, adds pump signal SP and carries out on 20, wherein pump signal SP can prespecifiedly be the pump voltage UP of driving, and this voltage produces a pump electric current I P.Similarly can specify a pump electric current I P, thus set up a pump voltage UP.Two parameters can be limited respectively in both cases, so that the load of especially restrictive pump unit 16.Two parameter UP, IP can be called pump signal SP.
Pump electric current I P is just defined as when in measuring chamber 28, oxygen is unnecessary, is then correspondingly defined as negative in measuring chamber 28 during hypoxia.Occur that zero of pump electric current I P passes through during stoichiometry in measuring chamber 28.
Run to make exhaust gas analyzer probe 14 and be also provided with heating regulation device 56, it depends on dew point-move down terminal TPE and depends on that the nominal temperature te_Soll of regulation of Abgassensor 14 provides heating power HZ to heating element 36.Just when dew point moves down past tense in waste gas position 12, just preferably heat exhaust gases pops one's head in 14, and therefore set out thus: in waste gas position 12, no longer can occur moisture or water droplet, they may can damage the ceramic component of exhaust gas analyzer probe 12 under certain condition.The terminal that possible dew point moves down is by dew point-move down terminal TPE to provide signal.There is provided heating power HZ to all the time heating element 36 at exhaust gas analyzer probe 14 run duration, thus any moment all carry out operation preparation.Nominal temperature te_Soll specifies like this, makes pump unit 16 can conduct oxygen ions fully.Preferably be adjusted to nominal temperature te_Soll, wherein temperature actual value can draw according to the collection of resistance in resistance in heating element 36 or pump unit 16 or measuring unit 22.Nominal temperature is such as 780 DEG C of +/-50 DEG C.
Certain situation may be there is in waste gas position 12 at internal-combustion engine 10 run duration.They cause the high capacity of the pump electrode 18 of the pump unit 16 especially standing waste gas effect.These states are such as states when there is high oxygen concentration or high pressure in waste gas position 12.
High oxygen concentration such as appears at internal-combustion engine 10 and slides run duration, and at this moment the rotating speed n of internal-combustion engine 10 is higher than a rotary speed threshold value, but wherein internal-combustion engine 10 is not wanted negate and carried.Interrupt the fuel input of internal combustion engine 10 in this case.Therefore may there is the rising of oxygen concentration in waste gas position 12,21% can be reached always, be equivalent to the oxygen concentration of ambient air.
If the exhaust gas valve had in any case 38 cuts out by means of valve adjustment drive unit 40 depends on valve signal KI, then may there is high pressure in waste gas position 12.A kind of such exhaust gas valve 38 is preferably arranged on 12 li, the waste gas position of commercial car.Add an exhaust gas pressure raised by the closedown of exhaust gas valve 38 to internal-combustion engine 10, thus occur higher braking moment when sliding operation.
Described running state causes pump electrode 18,20, especially stands the load rise of the pump electrode 18 of waste gas effect, and this is that this causes the corresponding rising of pump unit 16 temperature owing to may there is the pump electric current I P that high pump voltage UP is high in other words.Especially at pump electrode 18, the position near 20 is on the hazard, and the foreign matter from waste gas can easily pierce in this position, and this foreign matter may cause the poisoning of exhaust gas analyzer probe 14, until destroy.
According to the high capacity of the present invention in order to avoid exhaust gas analyzer probe 14, especially pump unit 16 pump electrode 18 in other words, the high capacity of 20, devise under internal-combustion engine 10 running state of regulation, when having at least by pump signal SP i.e. pump voltage UP in other words pump electric current I P disconnect, wherein however internal-combustion engine 10 run and exhaust gas analyzer probe 14 remained on nominal temperature te_Soll.If do not need the measurement signal UN reflecting oxygen concentration in waste gas, be here energy nernst voltage UN, so can at least always make pump signal SP disconnect.Such running state is such as that sliding of already mentioned internal-combustion engine 10 is run and the operation of internal-combustion engine 10 when exhaust gas valve 38 cuts out.Here should by the position of exhaust gas valve 38, especially it is closed in other words, as mentioned above, is interpreted as the running state of internal-combustion engine 10.
If the temperature release signal FG_te that heating regulation device 56 provides represents: exhaust gas analyzer probe 14 has been heated to its nominal temperature te_Soll, and so pump signal regulation device 54 provides pump signal SP.Just should depend on some running state of internal-combustion engine 10 in this case and disconnect pump signal SP.
There is provided exhaust gas valve release signal FG_KI to be simple especially, this signal can be identical with valve signal KI, or can obtain thus simply.
The running state of internal-combustion engine 10 is tried to achieve in device 58 in running state and is tried to achieve.The sliding of internal-combustion engine 10 is run preferably according to the rotating speed n of internal-combustion engine 10 and determine according to the load L that will be applied by internal-combustion engine 10.Slide operation if determined, so running state tries to achieve device 58 just provides and slides operation-release signal FG_SA, and it sends signal to pump signal determining device 54 to represent: pump signal SP can be made to disconnect.
Exhaust gas valve release signal FG_KI slides a kind of running state getting out illustrate internal-combustion engine 10 of operation-release signal FG_SA in other words, wherein before high capacity appears in exhaust gas analyzer probe 14, pump signal SP can be made to disconnect.
In addition pump signal SP is disconnected but when also can measure high oxygen concentration in waste gas position 12.The oxygen concentration recorded and an oxygen concentration-threshold value Lim_%O2 compare by measurement signal evaluating device 54 for this reason, and depend on that oxygen concentration-release signal FG_%O2 is supplied to pump signal determining device 54 by comparative result.The state of waste gas, especially oxygen concentration therefore should, as mentioned above, be interpreted as the running state of internal-combustion engine 10 in the sense of the present invention.
In the running state of the internal-combustion engine 10 illustrated, during the state occurred in waste gas position 12 in other words, can set out thus: the measurement signal UN provided by exhaust gas analyzer probe 14 is not provided, a yardstick of such as oxygen concentration or the NO in internal-combustion engine 10 waste gas
x-concentration, therefore can disconnect pump signal SP, thus temporarily no longer ensures that exhaust gas analyzer probe 14 is ready to measure.Also heated due to heating element 36, therefore provide pump signal SP can provide measurement signal UN to exhaust gas analyzer probe 14 again immediately when needed by preparation.
The another kind of running state of internal-combustion engine 10, now measurement signal UN might not need, and is a kind of stable running state, and the measurement signal UN wherein provided by exhaust gas analyzer probe 14 just should have little change or even not change.Running state tries to achieve device 58 such as obtains internal-combustion engine 10 a kind of steady operational status according to the rotating speed n of internal-combustion engine 10 and load L, and this rotating speed and load rotating speed interpretational criteria Lim_n in other words load evaluate criterion Lim_L evaluate.
Rotating speed interpretational criteria Lim_n or load evaluate criterion Lim_L such as corresponds to the maximum value of rotating speed n one of the gradient regulation of load L in other words.Rotating speed interpretational criteria Lim_n in other words load evaluate criterion Lim_L such as can also specify as difference in addition, wherein define the current rotating speed n of internal-combustion engine 10 load current in other words as forming the basis of difference, they compare with corresponding parameter after scheduled time.If there is the condition of at least approximate steady operational status of internal-combustion engine 10, so running state is tried to achieve device 58 and is just provided stable operation-release signal FG_Sta, disconnects when this signal can impel pump signal determining device 54 to be had at least by pump signal SP.
The verification of decision design one, sees whether stable running state exists at least one period determined.Regulation compares with ti-Min minimum duration of operation for this reason, and the latter is supplied to running state and tries to achieve device 58.The beginning of the steady operational status of the regulation of internal-combustion engine 10 is considered as the basis of comparing.
Claims (8)
1. the method for making the exhaust gas analyzer probe of heating (14) run, this Probe arrangement is inner at the waste gas position (12) of internal-combustion engine (10), wherein at measurement run duration, to the pump electrode (18 of the pump unit (16) of exhaust gas analyzer probe (14), 20) pump signal (SP) is provided, wherein this pump signal (SP) is pump voltage (UP) pump electric current (IP) in other words, this pump signal can be implemented in the inner oxonium ion transport of pump unit (16), it is characterized in that, exhaust gas analyzer probe (14) given be ready to run time, now exhaust gas analyzer probe (14) is heated to nominal temperature (te_soll), the described nominal temperature of regulation like this makes described pump unit (16) can conduct oxygen ions fully, and when internal-combustion engine (10) runs, if do not need the measurement signal (UN) of exhaust gas analyzer probe (14), pump signal is cut off time so with regard to depending on that the running state of internal-combustion engine (10) has at least, described running state comprises valve signal (KI), oxygen concentration-threshold value (Lim_%O2), the rotating speed (n) of internal-combustion engine (10), the load (L) of internal-combustion engine (10).
2. by method according to claim 1, it is characterized in that, be disconnected when pump signal has at least, if waste gas position (12) inner oxygen concentration has exceeded oxygen concentration threshold value Lim_%O2.
3. by method according to claim 1, it is characterized in that, be disconnected when pump signal has at least, if internal-combustion engine (10) is in when being disconnected fuel input slide operation.
4., by method according to claim 1, it is characterized in that, be disconnected when pump signal has at least, if internal-combustion engine (10) is under stable running state.
5., by method according to claim 4, it is characterized in that, verify, see whether stable running state has existed the minimum duration of operation (ti-Min) at least specified; And pump signal is just just being disconnected after the minimum duration of operation (ti-Min).
6. by method according to claim 1, it is characterized in that, be disconnected when pump signal has at least, if the inner exhaust gas valve (38) in the waste gas position (12) being arranged in internal-combustion engine (10) closes.
7. the device for making the exhaust gas analyzer probe of heating (14) run, this Probe arrangement is inner at the waste gas position (12) of internal-combustion engine (10), wherein at measurement run duration, to the pump electrode (18 of the pump unit (16) of exhaust gas analyzer probe (14), 20) pump signal is provided, this pump signal can be implemented in the inner oxonium ion transport of pump unit (16), it is characterized in that, at least be provided with one for implementing the controller (50) arranged specially by method described one of in claim 1 to 6, it includes the mechanism (52 for implementing this method, 54,56,58).
8. by device according to claim 7, it is characterized in that, be provided with running state as mechanism (52,54,56,58) and try to achieve device (58) for trying to achieve the running state of internal-combustion engine (10) and pump signal regulation device (54) for providing pump signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910029100 DE102009029100A1 (en) | 2009-09-02 | 2009-09-02 | Method for managing heated exhaust gas probe installed in exhaust gas zone of internal combustion engine of commercial vehicle, involves cutting pumping signals from time to time while operating internal combustion engine |
| DE102009029100.8 | 2009-09-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102003295A CN102003295A (en) | 2011-04-06 |
| CN102003295B true CN102003295B (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010271401.2A Active CN102003295B (en) | 2009-09-02 | 2010-09-01 | Method for managing exhaust gas probe and device for performing the method |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102003295B (en) |
| DE (1) | DE102009029100A1 (en) |
| FR (1) | FR2949506B1 (en) |
| IT (1) | IT1400770B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011087291A1 (en) * | 2011-11-29 | 2013-05-29 | Continental Automotive Gmbh | Method and device for operating a binary lambda probe, which is arranged in an exhaust tract of an internal combustion engine |
| DE102012204808A1 (en) * | 2012-03-26 | 2013-09-26 | Robert Bosch Gmbh | Device and method for controlling the temperature of an exhaust gas sensor |
| DE102016207516B4 (en) * | 2016-05-02 | 2021-10-28 | Vitesco Technologies GmbH | Method for determining the aging of a probe of an internal combustion engine designed to determine a gas concentration of a gas mixture |
| CN107764885B (en) * | 2017-12-04 | 2024-06-07 | 深圳市森世泰科技有限公司 | Apparatus and method for measuring gas concentration |
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| US5340462A (en) * | 1992-06-25 | 1994-08-23 | Mitsubishi Denki Kabushiki Kaisha | Air-fuel ratio sensor |
| DE10163912A1 (en) * | 2001-04-05 | 2003-02-06 | Bosch Gmbh Robert | Gas sensor, especially lambda probe |
| US6767442B1 (en) * | 1999-08-28 | 2004-07-27 | Robert Bosch Gmbh | Sensor element for determining the oxygen concentration in gas mixtures and method for its manufacture |
| CN101240753A (en) * | 2007-02-07 | 2008-08-13 | 丰田自动车株式会社 | Gas sensor controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10216724C1 (en) | 2002-04-16 | 2003-10-09 | Bosch Gmbh Robert | Operating broadband lambda probe for determining oxygen concentration in I.C. engine exhaust gas, involves repeatedly changing poles of pump voltage over duration of fuel injection step |
| DE10316645A1 (en) | 2003-04-11 | 2004-10-28 | Robert Bosch Gmbh | Device for operating a gas sensor |
| DE102004061355A1 (en) | 2004-12-21 | 2006-07-06 | Robert Bosch Gmbh | Method and device for controlling a gas measuring probe |
-
2009
- 2009-09-02 DE DE200910029100 patent/DE102009029100A1/en active Pending
-
2010
- 2010-08-30 IT ITMI2010A001582A patent/IT1400770B1/en active
- 2010-08-31 FR FR1056901A patent/FR2949506B1/en not_active Expired - Fee Related
- 2010-09-01 CN CN201010271401.2A patent/CN102003295B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5340462A (en) * | 1992-06-25 | 1994-08-23 | Mitsubishi Denki Kabushiki Kaisha | Air-fuel ratio sensor |
| US6767442B1 (en) * | 1999-08-28 | 2004-07-27 | Robert Bosch Gmbh | Sensor element for determining the oxygen concentration in gas mixtures and method for its manufacture |
| DE10163912A1 (en) * | 2001-04-05 | 2003-02-06 | Bosch Gmbh Robert | Gas sensor, especially lambda probe |
| CN101240753A (en) * | 2007-02-07 | 2008-08-13 | 丰田自动车株式会社 | Gas sensor controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102003295A (en) | 2011-04-06 |
| ITMI20101582A1 (en) | 2011-03-03 |
| FR2949506B1 (en) | 2016-11-11 |
| FR2949506A1 (en) | 2011-03-04 |
| IT1400770B1 (en) | 2013-07-02 |
| DE102009029100A1 (en) | 2011-03-03 |
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