CN101171510A - Device and method for the operation of a gas sensor, especially a lambda probe - Google Patents
Device and method for the operation of a gas sensor, especially a lambda probe Download PDFInfo
- Publication number
- CN101171510A CN101171510A CNA2006800149664A CN200680014966A CN101171510A CN 101171510 A CN101171510 A CN 101171510A CN A2006800149664 A CNA2006800149664 A CN A2006800149664A CN 200680014966 A CN200680014966 A CN 200680014966A CN 101171510 A CN101171510 A CN 101171510A
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- sensor
- temperature
- heating
- internal combustion
- combustion engine
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- 239000000523 sample Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 54
- 230000037007 arousal Effects 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000007789 gas Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000003213 activating effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
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
- G01N27/403—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
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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
- F02D41/1494—Control of sensor heater
Abstract
Disclosed are a device and a method for operating a gas sensor, particularly a lambda probe. Said sensor is provided with a heater and is heated before an internal combustion engine is started.
Description
Background technology
The present invention relates to a kind of according to the method described type of independent claims, that be used to move gas sensor, especially lambda probe.In addition, the invention still further relates to a kind of equipment that is used to move this sensor.
Known a kind of gas sensor from DE 100 52 005 A1; in this sensor; because the temperature jump that causes of condensate water, at first make the protection tube of sensor reach near the water evaporating temperature between 80 ° to 150 ℃ temperature in order after cranking internal combustion engine, to avoid pottery.This behavior is used for evaporating all water on the probe infield, so that avoid therefore possible deposition on the ceramic component of sensor.After certain residence time under this so-called protection heating mode, sensor for example is heated to 300 ° to 450 ℃ or also on the working temperature of its on this.For common lambda probe, from start a machine moving after about 15 seconds, reached the working temperature or the adjusting standby condition (Regelbereitschaft) of probe.
In order to observe modern waste gas ultimate value, this time is very long, because just in time the toxic emission that does not have to regulate when starting can reach high value.In addition must be high add thermal gradient, sensor element suffers corresponding high thermo-mechanical load thus.Finally, during the protection heating period, the condensate water that may exist in also can the incomplete evaporation protection tube.This causes again, and temperature jump is dangerous to improve.
Summary of the invention
The inventive method with feature of independent claims has the advantage of heating sensor before cranking internal combustion engine in contrast to this.Connect strategy by this, obviously shortened the time that sensor can put into operation after engine start.Therefore make the ultimate value of observing such as the modern waste gas standard of EU4/ULEV or SULEV scheme become easy significantly.Improved hot mechanical robustness in addition.
In addition advantageously, only sensor is heated to till first temperature, wherein, also will select first temperature, so that sensor does not suffer temperature jump the biglyyest.Preferably determine first temperature, so that protection tube or the pottery of sensor in exhaust piping (Abgastrakt) be positioned at also on the dewpoint temperature, make reduce sharply that condensate water accumulates in protection tube dangerous and the temperature jump danger that interrelates therewith.
In addition advantageously, determine heating arrangement according to determined running parameter.Therefore can be in an advantageous manner temperature changing process and the condition that occupies leading position such as the temperature of sensor or exhaust pipe (Abgasstrang), stop time, cell voltage or the like be complementary.
Especially advantageously, when having the hot start condition, not only sensor is heated on first temperature, and sensor is heated to until essential working temperature, so that sensor can put into operation after cranking internal combustion engine immediately.
A kind of suitable improvement project regulation, the temperature of regulating sensor by variable heating voltage rises.Therefore can mate thermograde in an advantageous manner, so that at first reach dewpoint temperature, and in other change procedure, temperature rises and can more gently change, and can further reduce the danger of temperature jump thus in the very short time.
A kind of other form of implementation stipulated, at first with first heating voltage and with second heating voltage sensor is heated on first temperature subsequently, wherein, in other favourable improvement project, first heating voltage is higher than second heating voltage.The behavior, mode had separately by changing the advantage that heating voltage realizes that favourable temperature rises.By the first high heating voltage, reach at first in an advantageous manner at its place and can evaporate the temperature of the water that exists, and need not make probe be subjected to jump in temperature.After reaching this medium temperature, the regulation according to the present invention realizes that with second heating voltage that is lower than first heating voltage milder temperature rises, so that therefore reach first temperature, and mechanical stress or thermal stress do not jeopardize sensor.By the behavior mode improved the hot mechanical robustness of sensor because with opposite from method commonly known in the art, the less thermal gradient that adds appears in sensor.
In addition, also advise, by the heating arrangement that (Wake-Up) function triggers sensor that wakes up of opertaing device according to the present invention.Can trigger this flip flop equipment by activating door contact, standby heating arrangement, seat contact (Sitzkontakt) and/or other executive component in addition.Activate these user's elements or be registered as customer incident by opertaing device, and trigger the so-called arousal function of opertaing device there, so impel heating sensor once again by this arousal function, or implement user's element, so that activation directly acts on sensor and promotes heating arrangement.
At last, a kind of equipment that is used to move gas sensor arranged according to the present invention, wherein, this equipment loads heating voltage for before cranking internal combustion engine the heating arrangement with sensor.
Embodiment
Embodiments of the invention are shown in the drawings, and elaborate in explanation subsequently.At this,
Fig. 1 illustrates the basic circuit diagram of present device.
Fig. 2 illustrates according to of the present invention and from temperature variation curve commonly known in the art, sensor.
The present invention emphasizes that basically pre-heat sensor, especially λ visit before engine start Pin is in order to reach as quickly as possible operating temperature and therefore realize spy after engine start The regulating power of pin. Regulation reaches above 80 ℃ the pottery of probe and especially probe for this reason Until the first about 300 ℃ temperature. When having water, these temperature also can not cause temperature prominent Become, but obviously so that further heated probe becomes easy. In addition, at this also with probe The protection tube mild heat that exists in case of necessity is until evaporated the condensed water that exists or no longer included it Till when its condensed water condenses upon near the sensor.
Fig. 1 exemplarily illustrates a kind of possible form of implementation of the present invention. Stipulate according to Fig. 1 , lambda probe 10 was both directly controlled or service voltage or electric current by control appliance 30, Indirectly control by final stage 20 again, wherein, in this case, final stage 20 is established by control Standby 30 control. In addition, control appliance 30 also receives customer incident 40, and according to these usefulness Family event or directly control lambda probe 10, or indirectly by final stage 20 control lambda probes 10. Can stipulate that also some event of user is directly done (just need not add control appliance) Be used for sensor, and promote the heater of sensor.
Under the off state of internal combustion engine, the opertaing device with so-called arousal function also can detect outside incident and especially detect customer incident, and by rights this is reacted.Especially can stipulate that opertaing device puts into operation by activating some executive component to the control device of major general's sensor.Therefore for example can stipulate,, just start warm by activating the door contact as long as the driver opens the automobile door by beeper or by automobile key.But also can activate standby heating arrangement and operate warm by process radio time switch or time switch.It is also conceivable that in addition by the seat contact active device is set, for example, just activate this active device on the driver's seat as long as the driver takes one's seat.It is contemplated that other activation possibility by other executive component.
In order to utilize the time during warm-up phase that may be of short duration best, stipulated according to the present invention, realize that with higher starting potential temperature rises fast, so that be to continue heating constantly with lower voltage subsequently, until engine start.
In Fig. 2, exemplarily shown in the curve 100 from the temporal temperature variation curve of sensor commonly known in the art and according to temperature variation curve 200 of the present invention.In general behavior, in starting during the t_S cranking internal combustion engine or afterwards constantly, just connect the heating arrangement of sensor, just reach working temperature t_B afterwards to show common mode about 15s after engine start.Stipulate now according to the present invention, when having customer incident, at incident moment t_E heating sensor.Curve 200 is exemplary in this case to illustrate the heating with variable heating voltage.At incident t_E constantly, at first represent steep thermal gradient, so that heating sensor as quickly as possible by applying the first high heating voltage.In this case, this temperature preferably remains under first temperature, so that avoid the temperature jump on the sensor.After reaching certain medium temperature or based on other criterion, apply second heating voltage of the heating that slows down sensor.Second heating voltage is in this case less than first heating voltage.For example, second heating voltage can be selected, so that progressively reach first temperature.At starting moment t_S, sensor is preheating on first temperature, so that be heated on the working temperature t_B, and therefore than preparation running status and the controllability that in the sensor of conventional operation, obviously can arrange sensor quickly in time in realization within the short time.
Replacedly, also can realize heating, and therefore match the condition that occupies leading position separately by control device or regulating device.Especially also can stipulate to consider the hot start condition.
If internal combustion engine is just shut down in short-term, then there is the hot start condition usually after it reaches working temperature.Under this condition, exhaust pipe is so, and consequently not having condensate water with exhaust pipe when resetting internal combustion engine is starting point.In addition, if when cranking internal combustion engine the wall of heat exhaust gases pipeline before the probe infield fast enough so that only form the small water yield (wall film) by condensation; If or guarantee the wall film that the waste gas stream by internal combustion engine does not atomize and may form by construction measure, so that water droplet can not fallen on the sensor; If or guarantee before the probe infield, not occur cistern (for example U trap) by construction measure, then can be looked at as the hot start condition.
In a kind of other improvement project, it is also conceivable that not only probe is heated on first temperature T _ 1, and probe is heated to until work temperature _ B.For example,, so that can from exhaust pipe, not have condensate water, then can be implemented in before the starting this heating until working temperature if exhaust pipe is owing to having of short duration stop time of internal combustion engine sufficiently high temperature.Especially also can stipulate, determine other running parameter of vehicle and according to determined running parameter heating sensor.For example when cell voltage is too low, can give up or shorten preheating fully.According to the stop time of internal combustion engine or the temperature in the exhaust pipe, determine some heating strategy or warm up strategy.
Warm up strategy according to the present invention causes sensor or the lambda probe operation standby condition fast after engine start.
This preheating has improved hot durability, and finally causes reducing the condensate water in the ceramic scope and the protection tube that may exist sensor.
In addition, this method has also been avoided the shortcoming of the freezing phenomenon in so-called Leiden (Leidenfrostschen Phaenomen) that occurs when fast heating sensor very.If for example water droplet has contacted the ceramic component that scalds, then on contact point, formed the water evaporating area of heat conductivility with reduction, this water evaporating area has weakened ceramic part cooling, and has therefore realized certain heat protection.But this effect not exclusively stops cooling, thereby under the too high situation of the temperature of ceramic component, for example being higher than under 500 ℃ the working temperature, still can form the thermal stress that causes damaging element.
In a kind of other form of implementation, stipulate, change heating voltage by width modulation.Therefore with simple mode and method can be directly from the supply voltage of for example cell voltage, and recently select to be used for corresponding effective voltage or the heating power that probe heats by the pulse interval of selecting modulation.
Excessive load for fear of battery can be defined in the heating of time upper limit system, or is given for other criterion of interrupting heating.Especially can stipulate, by operating normally opened contact again or locking vehicle and wait and interrupt preheating.So when operating set executive component again or in customer incident again, just activate the preheating of measuring sensor once more.It is hereby ensured, when each engine start, the warm-up phase of advanced line sensor.Under the situation of hot start, promptly when starting has the internal combustion engine of hot exhaust piping, for example when relaunching internal combustion engine, for example can recognize unnecessary warm-up phase again by exhaust gas temperature or down time.Can avoid the sensor of heat overheated thus.
In addition, it is also conceivable that the temperature of direct survey sensor, and activate warm-up phase according to the detected temperature on the sensor.
Claims (7)
1. be used to move the method for gas sensor, especially lambda probe, wherein, described sensor has heating arrangement, in the method, determine at least one running parameter of vehicle, and come heating sensor according to determined running parameter, it is characterized in that, before the cranking internal combustion engine sensor is being heated on first temperature, select this first temperature the biglyyest, so that sensor does not suffer temperature jump, and when having the hot start condition, before the cranking internal combustion engine sensor is being heated on the working temperature.
2. by the described method of claim 1, wherein, regulate temperature by variable heating voltage and rise.
3. by at least one the described method in the above claim, wherein, at first with first heating voltage and come heating sensor with second heating voltage subsequently.
4. by the described method of claim 3, wherein, first heating voltage is higher than second heating voltage.
5. by at least one the described method in the claim 3 to 4, wherein, regulate a described heating voltage at least by width modulation.
6. by at least one the described method in the above claim, it is characterized in that the arousal function by opertaing device and/or trigger the heating arrangement of sensor by the activation manipulation element.
7. equipment, it has the device that is used to move according to the described sensor of one of claim 1 to 6, it is characterized in that, described equipment loads heating voltage for before cranking internal combustion engine the heating arrangement of sensor, pick-up unit is determined the running parameter of vehicle, wherein, described equipment comes heating sensor according to determined running parameter, it is characterized in that, described equipment is selected first temperature before the cranking internal combustion engine sensor being heated on first temperature the biglyyest, so that sensor does not suffer temperature jump, and when having the hot start condition, described equipment is heated to sensor on the working temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005020363A DE102005020363A1 (en) | 2005-05-02 | 2005-05-02 | Device and method for operating a sensor for gases, in particular a lambda probe |
| DE102005020363.9 | 2005-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101171510A true CN101171510A (en) | 2008-04-30 |
Family
ID=36603516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800149664A Pending CN101171510A (en) | 2005-05-02 | 2006-05-02 | Device and method for the operation of a gas sensor, especially a lambda probe |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1880200A1 (en) |
| JP (1) | JP2008541030A (en) |
| CN (1) | CN101171510A (en) |
| DE (1) | DE102005020363A1 (en) |
| WO (1) | WO2006117357A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103117A (en) * | 2009-12-21 | 2011-06-22 | 罗伯特.博世有限公司 | Method to put an exhaust gas probe capable of heating into 'ready for operation' state quickly |
| CN103502613A (en) * | 2012-03-05 | 2014-01-08 | 大众汽车有限公司 | Method for controlling a heating device for heating a component, control device and motor vehicle with same |
| CN105980843A (en) * | 2014-02-12 | 2016-09-28 | 霍尼韦尔国际公司 | Gas sensors with structure to resist signal losses due to condensation |
| CN114585806A (en) * | 2019-08-19 | 2022-06-03 | 罗伯特·博世有限公司 | Method for operating an exhaust gas sensor |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008013515A1 (en) * | 2008-03-07 | 2009-09-10 | Volkswagen Ag | Method for operating a lambda probe during the warm-up phase |
| DE102009054127B4 (en) | 2009-11-20 | 2021-11-25 | Bayerische Motoren Werke Aktiengesellschaft | Method for activating the heating of a lambda probe in an exhaust system with a catalytic converter that can be heated by the exhaust gas |
| DE102010039872A1 (en) * | 2010-08-27 | 2012-03-01 | Robert Bosch Gmbh | Control chip of control device used for controlling combustion engine of vehicle, has incineration controller for controlling fuel incineration in engine, and injection controller for controlling fuel injection system of engine |
| DE102011002856A1 (en) | 2011-01-19 | 2012-07-19 | Robert Bosch Gmbh | Method for detecting at least one parameter of a gas |
| KR101214221B1 (en) | 2011-04-22 | 2012-12-20 | 주식회사 현대케피코 | Oxygen Sensor, Apparatus and Method for Control of Oxygen Sensor |
| DE102011119214A1 (en) * | 2011-11-23 | 2013-05-23 | Daimler Ag | Method for determining conversion capability of oxidation catalyst of exhaust gas treatment device for internal combustion engine used in motor vehicle, involves determining reference amplitude of sensor signal by lambda probe |
| KR20160149549A (en) * | 2015-06-18 | 2016-12-28 | 현대자동차주식회사 | Exhaust gas processing device |
| JP6406311B2 (en) * | 2016-05-09 | 2018-10-17 | トヨタ自動車株式会社 | Exhaust sensor control device |
| EP4112899B1 (en) * | 2021-07-02 | 2023-12-27 | Volvo Truck Corporation | Controlling nox emission control during start of a vehicle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03138560A (en) * | 1989-10-25 | 1991-06-12 | Ngk Insulators Ltd | Heat type air/fuel ratio detector |
| DE4019067A1 (en) * | 1990-06-15 | 1991-12-19 | Bosch Gmbh Robert | DEVICE FOR SWITCHING ON EXHAUST GAS HEATING |
| JP3104362B2 (en) * | 1992-01-27 | 2000-10-30 | 株式会社デンソー | Air-fuel ratio control device for internal combustion engine |
| DE4223954C1 (en) * | 1992-07-21 | 1994-01-13 | Bosch Gmbh Robert | Heating element controller for automobile engine - responds to sensor signals indicating seat belt closure, occupation of vehicle driving seat, or closure of all vehicle doors. |
| US6304813B1 (en) * | 1999-03-29 | 2001-10-16 | Toyota Jidosha Kabushiki Kaisha | Oxygen concentration detector and method of using same |
| DE10052005C2 (en) * | 2000-10-20 | 2002-11-21 | Bosch Gmbh Robert | Sensor for gases |
| DE10163912B4 (en) * | 2001-04-05 | 2016-07-21 | Robert Bosch Gmbh | Gas sensor, in particular lambda probe |
| JP3824984B2 (en) * | 2002-09-06 | 2006-09-20 | 三菱電機株式会社 | Exhaust gas sensor temperature control device |
-
2005
- 2005-05-02 DE DE102005020363A patent/DE102005020363A1/en not_active Withdrawn
-
2006
- 2006-05-02 EP EP06754941A patent/EP1880200A1/en not_active Withdrawn
- 2006-05-02 WO PCT/EP2006/061953 patent/WO2006117357A1/en not_active Application Discontinuation
- 2006-05-02 CN CNA2006800149664A patent/CN101171510A/en active Pending
- 2006-05-02 JP JP2008509427A patent/JP2008541030A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103117A (en) * | 2009-12-21 | 2011-06-22 | 罗伯特.博世有限公司 | Method to put an exhaust gas probe capable of heating into 'ready for operation' state quickly |
| CN102103117B (en) * | 2009-12-21 | 2014-12-24 | 罗伯特.博世有限公司 | Method to put an exhaust gas probe capable of heating into 'ready for operation' state quickly |
| CN103502613A (en) * | 2012-03-05 | 2014-01-08 | 大众汽车有限公司 | Method for controlling a heating device for heating a component, control device and motor vehicle with same |
| CN103502613B (en) * | 2012-03-05 | 2016-01-06 | 大众汽车有限公司 | For the controlling method of the heating equipment of heater, control apparatus and the automobile with control apparatus |
| US10548186B2 (en) | 2012-03-05 | 2020-01-28 | Volkswagen Aktiengesellschaft | Method for controlling a heating device for heating a component, control device and motor vehicle with same |
| CN105980843A (en) * | 2014-02-12 | 2016-09-28 | 霍尼韦尔国际公司 | Gas sensors with structure to resist signal losses due to condensation |
| CN105980843B (en) * | 2014-02-12 | 2019-01-01 | 霍尼韦尔国际公司 | The gas sensor of the structure of the loss of signal caused by with resisting because of condensation |
| US10955377B2 (en) | 2014-02-12 | 2021-03-23 | Life Safety Distribution Ag | Gas sensors with structure to resist signal losses due to condensation |
| CN114585806A (en) * | 2019-08-19 | 2022-06-03 | 罗伯特·博世有限公司 | Method for operating an exhaust gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1880200A1 (en) | 2008-01-23 |
| WO2006117357A1 (en) | 2006-11-09 |
| DE102005020363A1 (en) | 2006-11-16 |
| JP2008541030A (en) | 2008-11-20 |
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Open date: 20080430 |