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WO2007074021A1 - Sonde lambda a large bande - Google Patents

Sonde lambda a large bande Download PDF

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Publication number
WO2007074021A1
WO2007074021A1 PCT/EP2006/069159 EP2006069159W WO2007074021A1 WO 2007074021 A1 WO2007074021 A1 WO 2007074021A1 EP 2006069159 W EP2006069159 W EP 2006069159W WO 2007074021 A1 WO2007074021 A1 WO 2007074021A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
heater
lambda probe
nernst
broadband lambda
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2006/069159
Other languages
German (de)
English (en)
Inventor
Thomas Wahl
Lothar Diehl
Thorsten Ochs
Helge Schichlein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2007074021A1 publication Critical patent/WO2007074021A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G01N27/4065—Circuit arrangements specially adapted therefor

Definitions

  • the invention relates to a two-cell broadband lambda probe for determining the concentration of a gas component in a gas mixture, in particular in the exhaust gas of an internal combustion engine having a pumping cell with an external pumping electrode and an internal pumping electrode, which further comprises a Nernst cell with a Nernst electrode and a reference electrode, and having a heater with a first heater port and a second heater port for heating the two-cell broadband lambda probe.
  • the invention further relates to a single-cell broadband lambda probe for determining the concentration of a gas component in a gas mixture, in particular in the exhaust gas of an internal combustion engine having a combined pump / Nernst cell with an external pump / reference electrode and an internal pump / Nernst electrode and a heater having a first heater port and a second heater port for heating the single cell broadband lambda probe.
  • the invention also relates to a method for operating a broadband lambda probe, which is designed as a single-cell broadband lambda probe or as a two-cell broadband lambda probe for determining the concentration of a gas component in a gas mixture, in particular in the exhaust gas of an internal combustion engine, wherein the broadband Lambda probe has a heater.
  • Lambda sensors are used in the exhaust system of internal combustion engines for measuring the oxygen content of the exhaust gas in order to control the preparation of the fuel-air mixture of the internal combustion engine.
  • the voltage difference In a fuel-lean and thus oxygen-rich mixture, the voltage difference is lower, in a fuel-rich, oxygen-poor mixture, the voltage difference increases up to about 0.9V.
  • a broadband lambda probe is operated at a temperature of about 750.degree.
  • the broadband lambda probe is heated electrically in addition to being heated by the exhaust gas. In this case, it is first heated with high power for rapid heating and operated in stationary operation with a pulsed operating voltage with lower average power.
  • the connections of the heating according to the prior art are led out of the broadband lambda probe separately from the connections of the Nernst and pump cells. Otherwise, the voltage drop across a contact resistance in the supply line of the heater could falsify the measurement. Under practical conditions, such a voltage drop may well be IV and thus exceed the measured Nernst voltage of 0.45V.
  • merging ports would be desirable for cost reasons.
  • the object of the invention relating to the device is achieved in that the first heater connection or the second heater connection of the two-cell broadband lambda probe is connected to one of the connections of the pumping cell or the Nernst cell and in that a control device for a clocked Operation of the heater and is intended for signal evaluation.
  • the object of the invention relating to the device is achieved in that the first heater port or the second heater port of the single-cell broadband lambda probe is connected to one of the ports of the combined pump / Nernst cell and a control device for a clocked operation of the heater and is intended for signal evaluation.
  • Lambda probe which is briefly evaluated as a combined Nernst cell combined pump / Nernst cell only when the heater is not operated. Since no voltage drop in possible contact resistances occurs with an electroless heater, these can not disturb the measurement and connections of heater and Nernst cell or pump cell or heater and a combined pump / Nernst cell can be summarized at the broadband lambda probe. As a result, connection cable and plug contacts can be saved, which costs can be saved. For a broadband probe, which requires a five-pin plug according to the prior art, a cost-effective four-pin standard plug can be used, for example, by the improvement according to the invention.
  • the heater can be switched to battery earth with an Iow-side FET and thus be operated in a clocked manner.
  • the pumping current of the pumping cell can be provided both in the on and in the off phase of the heater in order to achieve a sufficient pumping power.
  • the heater with a high-side FET can be switched to battery voltage and thus operated clocked, so that in the off phases of Heater an undisturbed measurement of the Nernst voltage can be made, although the electrodes of the broadband lambda probe are connected to the heater.
  • the pumping current of the pumping cell can be provided both in the on and in the off phase of the heater.
  • the first heater connection is connected to the outer pumping electrode of the pumping cell and both are connected to a battery ground and a ground connection is established via the housing of the two-cell broadband lambda probe and conductive parts of the internal combustion engine or of its exhaust gas line the ground connection of the two-cell broadband Lambda probe via a connector omitted, which allows additional cost savings.
  • a further embodiment of a two-cell broadband lambda probe in which a plug connection can be saved compared to the prior art, provides that the first heater connection is connected to the inner pumping electrode and both are connected to the battery earth. Also in this embodiment can be done by the alternate operation of heating and measurement a low-interference signal evaluation.
  • the first heater port is connected to the inner pump / Nernst electrode of the combined pump / Nernst cell at a junction, in one mode connecting the junction to a battery ground and then the heater is operating the single cell broadband Heated lambda probe and the combined pump / Nernst cell operates as a pumping cell, and is not operated in another mode of operation of the heater and the combined pump / Nernst cell, at least temporarily operated as a Nernst cell, can also in a single-cell broadband lambda probe a connection saved on a connector and the associated supply line.
  • the combined pump / Nernst cell is operated only for a short time as a Nernst cell and works for the rest of time in this phase as a pumping cell.
  • the first heater port is connected to the pump internal / Nernst electrode of the combined pump / Nernst cell at a junction, in one mode connecting the junction to a battery voltage and then the heater is single cell broadband Lambda probe heated and the combined pump / Nernst cell operates as a pumping cell, and is operated in another mode of operation of the heater and the combined pump / Nernst cell, at least temporarily, operated as a Nernst cell.
  • the object of the invention relating to the method is achieved in that the heater is not operated during the measurement of the Nernst voltage of the broadband lambda probe.
  • a contact resistance at a connection to the heater and the voltage drop following it at a powered heater can not adversely affect the measurement accuracy of the Nernst cell or the pumping current through the pump cell, even if it uses a common connection to the control unit with the heater.
  • the shutdown phase of the heater and thus the measurement phase of the Nernst cell be selected short and still maintained by the Nernst cell current through the pumping cell continuously maintained.
  • a short shutdown phase of the heater is also advantageous because it allows a low supply voltage of the heater can be used and still a sufficient average heating power can be provided.
  • FIG. 1a shows a two-cell broadband lambda probe with a common connection of heater and pump cell to battery voltage
  • FIG. 2 shows the two-cell broadband lambda probe with common connection of heater and pump cell to battery mass
  • FIG. 3 shows a single-cell broadband lambda probe with Iow-side FET
  • FIG. 4 shows a block diagram for a single-cell, wide-band lambda probe with high-side FET.
  • FIG. 5 shows a circuit diagram of a two-cell broadband lambda probe with a reduced number of cables.
  • FIG. 1a shows a block diagram for a two-cell broadband lambda probe 2 with a pump cell 10, a Nernst cell 11 and a heater 12, which are connected to a control unit 30 via a plug connector 20.
  • the pump cell 10, the Nernst cell 11 and the heater 12 are summarized in a structural unit according to the prior art and protrude into an exhaust passage of an internal combustion engine, not shown here.
  • the pump cell 10 has an outer pump electrode 10.1 and an inner pump electrode 10.2 and a pump cell internal resistance 15.
  • the pump cell internal resistance 15 is shown here schematically as a separate component and is the resistance of the ceramic component at the operating temperature.
  • the inner pump electrode 10. 2 is electrically connected to a Nernst electrode 11. 1 of the Nernst cell 11.
  • the other electrode of the Nernst cell 11 is formed by a reference electrode 11.2.
  • the Nernst cell 11 has a Nernst cell internal resistance 14, which is shown schematically as a separate component.
  • the outer pumping electrode 10. 1 and a first heater connection 12. 1 of the heater 12 are connected to a battery voltage 40 via a first connection point 21 of the plug connector 20.
  • a second heater port 12.2 of the heater 12 is connected via a fourth connection point 24 of the connector 20 with an Iow-side FET 51, which in turn is connected to a battery ground 44.
  • the Iow-side FET 51 is a field-effect transistor disposed between the second heater terminal 12. 2 connected to the low potential of the heater 12 and the battery ground 44.
  • the Nernst electrode 11.1 and the reference electrode 11.2 of the Nernst cell 11 are connected to the control unit 30 via a second and a third connection point 22, 23 of the connector 20.
  • the voltage of the Nernst cell 11 is at least partially compensated by a reference voltage source 31, which outputs a voltage of 0.45 V and acts on the non-inverting input of a differential amplifier 34.
  • the reference electrode 11.2 is connected to the inverting input of Differential amplifier 34 connected.
  • the differential amplifier 34 is supplied with an operating voltage 42 which is at least 2.5V higher than the battery voltage 40 in order to be able to provide a sufficient pump voltage even at high Nernst voltage and despite a voltage drop across the pump cell internal resistance 15, which causes the required pumping current , In a typical application, a battery voltage 40 of 13V must be expected, so that the operating voltage 42 must be at least 15.5V.
  • the output of the differential amplifier 34 is connected via a resistor 32 to the battery voltage 40 and the external pumping electrode 10.1.
  • a lambda signal 43 of the differential amplifier 34 causes a current through the resistor 32 and thus causes a voltage drop between the inputs of a second differential amplifier 33, which generates an output signal 41 of the two-cell broadband lambda probe 2.
  • the lambda signal 43 is further supplied to an inverter 35 whose non-inverting input is connected to the battery voltage 40.
  • the output of the inverter 35 acts on a controllable voltage source 37, which is connected via a load resistor 36 to the negative side of the reference voltage source 31.
  • the outer pumping electrode is located
  • the Nernst electrode 11.1 lie in a cavity which is exposed to the exhaust gas via a diffusion barrier and whose oxygen concentration can be controlled by means of the pumping cell 10.
  • the reference electrode 11.2 is facing the outside air or a similar gas mixture. If the arrangement is exposed to exhaust gas with a lambda of 1, the Nernst cell 11 generates an output voltage which corresponds to the voltage of the reference 31.
  • both inputs are at the same voltage, so that it emits a mean output signal that sets the voltage source 37 so that its output voltage corresponds to the battery voltage 40 and between the outer pump electrode 10.1 and the inner pumping electrode 10.2 on the pumping cell 10 is no voltage difference. If lean and therefore oxygen-rich exhaust gas reaches the arrangement, the voltage at the Nernst cell 11 drops below the voltage value of the reference voltage source 31, so that the lambda signal 43 at the output of the differential amplifier 34 rises and a positive output signal 41 is generated at the second differential amplifier 33. The inverter 35 converts the positive lambda signal 43 into an output signal which sets the voltage source 37 at a lower voltage than the battery voltage 40.
  • the voltage at Nernstzelle 11 increases above the voltage value of the reference voltage source 31, so that the lambda signal 43 at the output of the differential amplifier 34 drops and, based on the battery voltage 40, negative output signal 41 at the second differential amplifier 33rd is produced.
  • the inverter 35 converts the negative lambda signal 43 into an output signal that sets the voltage source 37 at a higher voltage than the battery voltage 40. There is therefore a voltage difference between the outer pumping electrode 10.1 and the inner pumping electrode 10.2 on the pumping cell 10, which causes a pumping current via the load resistor 36, which transports oxygen into the cavity with the Nernst electrode 11.1 and the inner pumping electrode 10.2.
  • the heater 12 is connected to the first heater terminal 12. 1 with the battery voltage 40.
  • the second heater terminal 12.2 is connected via the fourth connection point 24 in the connector 20 to the Iow-side FET 51, which depends on the internal resistance.
  • controlled state 53 controls the second heater connection 12.2 connects with battery ground 44 and so the heater 12 is activated.
  • the internal resistance control 53 has as input the temperature-dependent internal resistance of the Nernst- cell 11 and thus regulates the temperature of the assembly to a typical operating temperature of 750 ° C. In synchronism with the timing of the internal resistance control 53, the measurement of the Nernst voltage of the Nernst cell 11 is activated and deactivated. If the heater were not operated clocked, a voltage drop at the line connected to the first connection point 21 would also change the voltage at the pump cell 10 and the Nernst cell 11 and thus disturb their function or the measurement of the Nernst voltage.
  • FIG. 1 b shows the two-cell broadband lambda probe 2 with pumping current generation in another embodiment.
  • the output of the inverter 35 acts via a base resistor 39 on an NPN transistor 38 whose collector is connected to the operating voltage 42, which is at least 2.5V higher than the battery voltage 40.
  • the emitter of the transistor is connected via a second load resistor 36. 1 to the battery ground 44.
  • the emitter of the transistor 38 is connected via the load resistor 36 to the negative side of the reference voltage source 31. If lean and thus oxygen-rich exhaust gas reaches the arrangement, the inverter 35 generates an output signal that is lower than the battery voltage 40.
  • the emitter of the transistor 38 is therefore also at a potential lower than the battery voltage 40. This causes a voltage difference between the outer pumping electrode 10.
  • the transistor 38 opens and connects the inner pumping electrode 10. 2 to a potential which is higher than the battery voltage 40. Therefore, oxygen is transported into the cavity with the Nernst electrode 11.1 and the inner pumping electrode 10.2.
  • FIG. 2 shows an arrangement for the two-cell broadband lambda probe 2, in which the common line of outer pumping electrode 10.1 and first heater connection 12.1 is connected to the battery ground 44.
  • the operating voltage 42 of the differential amplifier 34 is at least 2.5V.
  • a second operating voltage 42.1 of the differential amplifier 34 is lower than -2.5V.
  • the output of the differential amplifier 34 is connected to the battery ground 44 via the resistor 32.
  • the lambda signal 43 is then the same as the battery mass 44 and no voltage drop occurs at the resistor 32.
  • the inputs of the inverter 35 are both also at the same potential as the battery ground 44, so that its output signal controls the voltage source 37 so that its output is the same high as the battery ground 44 and no pumping current is driven through the pumping cell 10 ,
  • the inverter 35 When the two-wavelength broadband lambda probe 2 is supplied with lean exhaust gas, the inverter 35 generates an output signal which controls the voltage source 37 so that its output voltage is lower than the battery voltage 40 and the internal pumping electrode 10.2 is therefore also at a lower potential than the outside - Pump electrode 10.1 is located. As a result, oxygen is transported out of the cavity with the Nernst electrode 11.1 and the inner pumping electrode 10.2.
  • the pumping current source can also be realized according to the embodiment shown in FIG.
  • the second heater connection 12.2 is connected to the battery voltage 40 via the fourth connection point 24 in the connector 20 via a high-side FET 52.
  • the high-side FET 52 is a field-effect transistor which is arranged between the second heater terminal 12. 2 connected to the high potential of the heater 12 and the battery voltage 40.
  • the high-side FET 52 is switched to passage by means of the internal resistance control 53. Again, in synchronism with the timing of the heater 12 through the internal resistance control 53, the measurement of the Nernst voltage of the Nernst cell 11 is activated and deactivated to avoid the negative effect of a possible voltage drop on the supply line connected to the third connection point 23.
  • 3 shows an arrangement for operating a single-cell broadband lambda probe 1.
  • / Nernstelektrode 13.2 is connected via the connector 20 to a digital pumping current regulator 50 in the control unit 30.
  • the outer pump / reference electrode 13.1 at the first connection point 21 and the inner pump / Nernst electrode 13.2 at the second connection point 22 are connected to the plug connector 20.
  • the combined pump / Nernst cell has an internal resistance 16, which is shown here schematically as a separate component.
  • the digital pump current regulator 50 outputs a digital lambda signal 45 to a motor control, not shown here.
  • the first heater connection 12.1 of the heater 12 is connected to the control unit 30 via the second connection point 22 together with the internal pump / Nernst electrode 13.2.
  • the heater 12 is connected at its second heater terminal 12.2 via the third connection point 23 and the Iow-side FET 51, controlled by the internal resistance control 53, with the battery ground 44.
  • the timing of the heater 12 causes the voltage of the short-term operated as a Nernst cell combined pump / Nernst cell 13 can be evaluated without interference from a possibly occurring at a contact resistance at the second connection point 22 or the wiring line voltage drop in the clock breaks.
  • the oxygen pumping process is briefly interrupted, exhaust gas passes through the diffusion barrier into the cell and the Nernst voltage deviating from the reference voltage of 0.45V is measured.
  • the Nernst voltage determines the polarity of the voltage of the subsequent pumping process and thus the direction of oxygen transport. If the internal resistance control 53 connects the second heater connection 12.2 to the battery ground 44, the combined pump / Nernst cell 13 is operated as a pump cell.
  • a connection point in the connector 20 can be saved.
  • FIG 4 shows an arrangement for operating a single-cell broadband lambda probe 1, in which the second heater terminal 12. 2 can be connected to the battery voltage 40 via the high-side FET 52. Again, the first heater port 12.1 of the heater 12 is connected together with the réellepump- / Nernstelektrode 13.2 of the combined pump / Nernst cell 13 via the second connection point 22 to the controller 30 and a connection point is saved compared to a separate supply of the heater 12.
  • FIG. 5 shows an embodiment of the two-cell broadband lambda probe 2 with an operating device 60, in which the pump cell 10, the Nernst cell 11 and the heater 12 are connected in common to a housing of the two-cell broadband lambda probe 2 protruding into the exhaust gas.
  • the two-cell broadband lambda probe 2 is connected to the battery ground via metallic components of the internal combustion engine and its exhaust gas line. It is advantageous here that, compared to the embodiments shown in FIGS. 1 a, 1 b and 2, a further connection can be saved on the plug connector 20.
  • the Nernst cell internal resistance 14 and the pump cell internal resistance 15 are shown schematically here.
  • a contact resistance possibly occurring between the metallic components of the internal combustion engine or its exhaust gas line and the housing of the probe protruding into the exhaust gas is shown schematically.
  • the Nernst cell 11 is connected at the second connection point 22 of the connector 20 to the inverting input of the differential amplifier 34.
  • Your convincedpump- / Nernst electrode is connected via the compared to the Nernst cell internal resistance 14 low-resistance heater 12 via the third connection point 23 with the reference voltage source 31.
  • the low resistance of the heater 12 has the advantage that the measurement error is very low in the case of the low current flowing during the measurement of the Nernst voltage.
  • the reference voltage source 31 is connected to the non-inverting input of the differential amplifier 34, whose output signal is fed to a sample-and-hold circuit 62.
  • An output signal of the sample-and-hold circuit 62 is fed to a pumping current transformer 61 which supplies a pumping current via the first connection point 21 of the connector 20 to the pumping cell 10.
  • the high-side FET 52 connected to the battery voltage 40 is opened and activates the heater 12; this is see- indicated by the connection of the sample-and-hold circuit 62 with the high-side FET 52.
  • the voltage of the Nernst cell 11 is evaluated relative to the reference voltage source 31 in the differential amplifier 34 and kept constant the result by means of the sample-and-hold circuit 62 for the remainder of the clock cycle, so that the pumping current transformer 61 the Pump cell can provide the necessary pumping current.
  • the measurement in the clock break occurs at the moment of measuring the Nernst voltage at the Nernst cell 11 at the contact resistance 17 no falsifying the measurement voltage drop, although in this arrangement, a connection between the probe and the operating device 60 was saved by the connections of the heater 12 are not both connected directly to the control gear.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)

Abstract

L'invention concerne une sonde lambda à large bande à une ou deux cellules, qui sert à déterminer la concentration d'un constituant gazeux dans un mélange gazeux, notamment dans les gaz d'échappement d'un moteur à combustion interne. La sonde lambda à large bande selon l'invention comprend une cellule de pompage munie d'une électrode de pompage externe et d'une électrode de pompage interne, une cellule Nernst munie d'une électrode Nernst et d'une électrode de référence, ainsi qu'un élément chauffant muni d'une première connexion d'élément chauffant et d'une deuxième connexion d'élément chauffant. Selon l'invention, la première connexion ou la deuxième connexion d'élément chauffant de la sonde lambda à large bande à deux cellules est reliée à l'une des connexions de la cellule de pompage ou de la cellule Nernst et un appareil de commande assure le fonctionnement cadencé de l'élément chauffant et l'évaluation des signaux ou bien la première connexion ou la deuxième connexion d'élément chauffant de la sonde lambda à large bande à une cellule est reliée à l'une des connexions de la cellule Nernst/de pompage combinée et un appareil de commande assure le fonctionnement cadencé de l'élément chauffant et l'évaluation des signaux. Ainsi, grâce au fonctionnement cadencé de l'élément chauffant et de l'évaluation des signaux, il est possible de n'évaluer les signaux que lorsque l'élément chauffant ne fonctionne pas. Comme aucune chute de tension ne peut apparaître au niveau de résistances de transition éventuelles lorsque l'élément chauffant est hors tension, ces résistances ne peuvent pas perturber la mesure et les connexions de l'élément chauffant et de la cellule Nernst ou de la cellule de pompage ou bien de l'élément chauffant et d'une cellule Nernst/de pompage combinée peuvent être réunies sur la sonde lambda à large bande. Il est ainsi possible de renoncer aux câbles de liaison et aux contacts à fiche, ce qui permet de réduire les coûts.
PCT/EP2006/069159 2005-12-23 2006-11-30 Sonde lambda a large bande Ceased WO2007074021A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102005062117.1 2005-12-23
DE102005062117 2005-12-23
DE102006004167 2006-01-30
DE102006004167.4 2006-01-30
DE102006014266A DE102006014266A1 (de) 2005-12-23 2006-05-18 Breitband-Lambdasonde
DE102006014266.7 2006-05-18

Publications (1)

Publication Number Publication Date
WO2007074021A1 true WO2007074021A1 (fr) 2007-07-05

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WO (1) WO2007074021A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120240692A1 (en) * 2009-10-06 2012-09-27 Wallac Oy Optical measurement intstrument
DE102008004015B4 (de) * 2008-01-11 2018-01-11 Continental Automotive Gmbh Verfahren zur Erkennung von Übergangswiderständen in Leitungen einer Sonde

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027378A1 (de) 2009-07-01 2011-01-05 Robert Bosch Gmbh Verfahren und Diagnosevorrichtung zur Diagnose einer beheizbaren Abgassonde einer Brennkraftmaschine
DE102010029776A1 (de) * 2010-06-08 2011-12-08 Robert Bosch Gmbh Verfahren zum Erkennen des Typs von Lambdasonden
DE102010061881A1 (de) * 2010-11-24 2012-05-24 Robert Bosch Gmbh Lambdasonde zur Erfassung eines Sauerstoffgehalts in einem Abgas und Verfahren zur Signalübertragung zwischen einer Lambdasonde und einer elektrischen Schnittstelle
DE102011004492A1 (de) 2011-02-22 2012-08-23 Robert Bosch Gmbh Lamdasonde und Verfahren zum Betrieb einer Lamdasonde
DE102011005882A1 (de) 2011-03-22 2012-09-27 Robert Bosch Gmbh Vorrichtung zur Bestimmung des Sauerstoffgehalts in einem Abgas und Verfahren zur Kennzeichnung und zum Betrieb einer Breitband-Lambdasonde
DE102019219647A1 (de) * 2019-12-16 2021-06-17 Robert Bosch Gmbh Messung des Nebenschlusswiderstands einer Lambdasonde und Korrektur dessen Einflusses

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103169A2 (fr) * 1982-08-13 1984-03-21 Hitachi, Ltd. Capteur du rapport air-combustible
EP0125069A1 (fr) * 1983-04-26 1984-11-14 Ngk Insulators, Ltd. Elément électrochimique et appareil comprenant cet élément
DE3942773A1 (de) * 1989-12-23 1991-06-27 Bosch Gmbh Robert Plaettchenfoermige breitbandsonde fuer die bestimmung der sauerstoffkonzentration in abgasen
EP0798557A2 (fr) * 1996-03-25 1997-10-01 Ngk Insulators, Ltd. Capteur de gaz et méthode pour mesurer la quantité de composés spécifiques dans un gaz de mesure
DE10337573A1 (de) * 2003-08-14 2005-03-17 Robert Bosch Gmbh Sensorelement
DE102004018871A1 (de) * 2004-04-19 2005-11-10 Siemens Ag Verfahren und Vorrichtung zum Betreiben einer Abgas-Analyse-Sensorzelle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103169A2 (fr) * 1982-08-13 1984-03-21 Hitachi, Ltd. Capteur du rapport air-combustible
EP0125069A1 (fr) * 1983-04-26 1984-11-14 Ngk Insulators, Ltd. Elément électrochimique et appareil comprenant cet élément
DE3942773A1 (de) * 1989-12-23 1991-06-27 Bosch Gmbh Robert Plaettchenfoermige breitbandsonde fuer die bestimmung der sauerstoffkonzentration in abgasen
EP0798557A2 (fr) * 1996-03-25 1997-10-01 Ngk Insulators, Ltd. Capteur de gaz et méthode pour mesurer la quantité de composés spécifiques dans un gaz de mesure
DE10337573A1 (de) * 2003-08-14 2005-03-17 Robert Bosch Gmbh Sensorelement
DE102004018871A1 (de) * 2004-04-19 2005-11-10 Siemens Ag Verfahren und Vorrichtung zum Betreiben einer Abgas-Analyse-Sensorzelle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008004015B4 (de) * 2008-01-11 2018-01-11 Continental Automotive Gmbh Verfahren zur Erkennung von Übergangswiderständen in Leitungen einer Sonde
US20120240692A1 (en) * 2009-10-06 2012-09-27 Wallac Oy Optical measurement intstrument
US8896820B2 (en) * 2009-10-06 2014-11-25 Wallac Oy Optical measurement instrument

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