ES8503130A1 - Device for generating a reference potential by means of potentiometric lambda probes. - Google Patents

Device for generating a reference potential by means of potentiometric lambda probes.

Info

Publication number
ES8503130A1
ES8503130A1 ES532854A ES532854A ES8503130A1 ES 8503130 A1 ES8503130 A1 ES 8503130A1 ES 532854 A ES532854 A ES 532854A ES 532854 A ES532854 A ES 532854A ES 8503130 A1 ES8503130 A1 ES 8503130A1
Authority
ES
Spain
Prior art keywords
rich
lean
electrode
counter
passage
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.)
Expired
Application number
ES532854A
Other languages
Spanish (es)
Other versions
ES532854A0 (en
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 ES8503130A1 publication Critical patent/ES8503130A1/en
Publication of ES532854A0 publication Critical patent/ES532854A0/en
Granted legal-status Critical Current

Links

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
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
    • G01N27/4076—Reference electrodes or reference mixtures

Landscapes

  • 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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

In said method, the measuring electrode and the counter-electrode are exposed to exhaust gas and present an adjustment which causes alternating changes between the rich and lean operations. Furthermore the counter-electrode is so arranged that the sensitive time and the dead time upon the passage of gas from the rich to the lean operation deviate from the sensitive time and the dead time upon the gas passage from the lean to the rich operation. Therefore, the counter-electrode has asymmetric sensitive times. A rich reference is preferably used wherein the sensitive time and the dead time upon the gas passage from the lean to the rich is shorter than the passage from the rich to the lean. Furthermore, the counter-electrode is provided with an anti-diffusion layer which presents pores having diameters which are small with respect to the mean free travelling length of oxygen molecules. Thereby, the measuring electrode does not make loop oscillations in the rich to lean direction and generate a substantially constant potential which may be used as a reference potential for the probe.
ES532854A 1983-05-27 1984-05-25 PROCEDURE FOR OBTAINING A REFERENCE POTENTIAL WITH POTENTIOMETRIC LAMBDA PROBES Granted ES532854A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833319186 DE3319186A1 (en) 1983-05-27 1983-05-27 METHOD FOR GENERATING A REFERENCE POTENTIAL IN POTENTIOMETRIC LAMBDA PROBE

Publications (2)

Publication Number Publication Date
ES8503130A1 true ES8503130A1 (en) 1985-02-01
ES532854A0 ES532854A0 (en) 1985-02-01

Family

ID=6199972

Family Applications (1)

Application Number Title Priority Date Filing Date
ES532854A Granted ES532854A0 (en) 1983-05-27 1984-05-25 PROCEDURE FOR OBTAINING A REFERENCE POTENTIAL WITH POTENTIOMETRIC LAMBDA PROBES

Country Status (6)

Country Link
EP (1) EP0149619A1 (en)
JP (1) JPS60501474A (en)
DE (1) DE3319186A1 (en)
ES (1) ES532854A0 (en)
IT (1) IT1178480B (en)
WO (1) WO1984004816A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3685791D1 (en) * 1985-04-17 1992-07-30 Bayer Diagnostic Gmbh ELECTROCHEMICAL PROBE.
DE3931235A1 (en) * 1989-09-19 1991-03-28 Max Planck Gesellschaft Solid electrolyte gas-sensor without ionic transfer - uses minority carrier transport to make it free of surface polarisation and able to operate at low temperature
DE102021111431A1 (en) 2020-06-29 2021-12-30 Dräger Safety AG & Co. KGaA Surveillance system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304464C2 (en) * 1973-01-31 1983-03-10 Robert Bosch Gmbh, 7000 Stuttgart Sensor for monitoring the functionality of catalytic converters in exhaust gas
CA1015827A (en) * 1974-11-18 1977-08-16 General Motors Corporation Air/fuel ratio sensor having catalytic and noncatalytic electrodes
JPS5274385A (en) * 1975-12-18 1977-06-22 Nissan Motor Airrfuel ratio detector
GB2004067A (en) * 1977-09-09 1979-03-21 Bendix Autolite Corp Solid electrolyte exhaust gas oxygen sensor
JPS54149698A (en) * 1978-05-16 1979-11-24 Nippon Denso Co Ltd Oxygen concentration detector
FR2444272A1 (en) * 1978-12-12 1980-07-11 Thomson Csf ELECTROCHEMICAL SENSOR OF SPECIES CONCENTRATIONS IN A FLUID MIXTURE OF THE TYPE WITH INTERNAL REFERENCE OF PARTIAL PRESSURE
US4253934A (en) * 1979-04-17 1981-03-03 General Motors Corporation Aging treatment for exhaust gas oxygen sensor
JPS6034062B2 (en) * 1979-05-25 1985-08-06 日産自動車株式会社 Air fuel ratio detection device
DE2922131A1 (en) * 1979-05-31 1980-12-18 Bosch Gmbh Robert POLAROGRAPHIC PROBE FOR DETERMINING THE OXYGEN CONTENT IN GAS, ESPECIALLY IN EXHAUST GAS FROM COMBUSTION ENGINES
JPS58158553A (en) * 1982-03-17 1983-09-20 Toyota Motor Corp Oxygen sensor

Also Published As

Publication number Publication date
ES532854A0 (en) 1985-02-01
WO1984004816A1 (en) 1984-12-06
IT8421098A1 (en) 1985-11-25
EP0149619A1 (en) 1985-07-31
IT1178480B (en) 1987-09-09
JPS60501474A (en) 1985-09-05
DE3319186A1 (en) 1984-11-29
IT8421098A0 (en) 1984-05-25

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