US3844920A - Air fuel ratio sensor - Google Patents

Air fuel ratio sensor Download PDF

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Publication number
US3844920A
US3844920A US00417724A US41772473A US3844920A US 3844920 A US3844920 A US 3844920A US 00417724 A US00417724 A US 00417724A US 41772473 A US41772473 A US 41772473A US 3844920 A US3844920 A US 3844920A
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US
United States
Prior art keywords
shoulder
zirconia element
shell
metal
exhaust gas
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 - Lifetime
Application number
US00417724A
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English (en)
Inventor
R Burgett
B Holleboom
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.)
Motors Liquidation Co
Original Assignee
General Motors Corp
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 General Motors Corp filed Critical General Motors Corp
Priority to US00417724A priority Critical patent/US3844920A/en
Priority to CA211,835A priority patent/CA1004731A/en
Application granted granted Critical
Publication of US3844920A publication Critical patent/US3844920A/en
Priority to DE2452924A priority patent/DE2452924C3/de
Priority to IT54009/74A priority patent/IT1023229B/it
Priority to FR7438343A priority patent/FR2251821B1/fr
Priority to JP13322874A priority patent/JPS5331795B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G01N27/4077—Means for protecting the electrolyte or the electrodes

Definitions

  • ABSTCT This invention relates to a sensor that can be used in an exhaust system for sensing the relative presence of oxygen in the exhaust stream.
  • the sensor includes a hollow zirconia element that is conical in shape, and is closed at one end with the zirconia element having platinum electrodes on the inside and outside surfaces.
  • a mounting device that is constructed of easily assembled parts supports the zirconia element.
  • the sensor is constructed and adapted to be mounted in the automobile exhaust stream so as to expose the outside of the zirconia element to the exhaust stream and the inside to atmosphere.
  • a shield that protects the outside of the zirconia element is attached to the mounting device to prevent erosion of the electrode coating.
  • a mica insulator is included as an essential element in the assembly to maintain a tight seal between the different componen parts and assure electrical continuity.
  • the senor With such conditions, it is convenient to think of the sensor as a miniature electrochemical fuel cell in which these gases become a fuel source for the cell.
  • the platinum electrode catalytically enhances chemical oxidation reaction which in turn depletes the concentration of oxygen at that surface.
  • a low surface concentration of oxy- I gen results and the sensor voltage rises to generate an EMF signal logarithmically proportional to the relative concentrations of combustible gases in the exhaust. This signal is used in combination with other components to adjust and maintain desired engine air fuel mixtures.
  • Prior art devices constructed similar to that of the present invention and used in automobile exhaust systems generally include a mounting means to hold the zirconia element wherein the zirconia element extends the full length of and beyond the ends of the mounting means, with the end of the zirconia element exposed to the exhaust stream extending substantially beyond the lower end of the mounting means.
  • the zirconia element requires a substantial amount of zirconia and platinum to make up the element and electrodes, and in addition the prior art devices use a rather expensive and complex mounting sys-' base element as well as a savings in the platinum used to make the electrodes.
  • the mounting means is made up of parts that are relatively inexpensive to manufacture and are more easily assembled than those of the prior art and includes a material such as mica not found in the prior art devices to compensate for the expansion and contraction of the several diverse materi- It is therefore an object of this invention to provide an exhaust gas sensor that'includes a zirconia element that is shorter in length than prior art devices and therefore less expensive to manufacture.
  • a further object is to provide an exhaust gas sensor that includes a zirconia element that is easily adaptable for mounting in a compact, easily manufactured and assembled mounting system.
  • a further object is to provide an exhaust gas sensor in which the zirconia element is easily adaptable to an interchangeable mounting means.
  • Another object is to provide a mica gasket in the sensor that will compensate for the expansion and contraction of the several different parts having different coefficients of thermal expansion that make up the sensor to thereby provide and maintain a gas-tight seal and electrical contact between the parts.
  • FIG. 1 is a side view of the preferred embodiment of the invention showing the sensor in partial cross section mounted in an exhaust pipe;
  • FIG. 2 is a view in the direction of line 22 of FIG. 1, showing the configuration of the openings in the shield;
  • FIG. 3 is a side view of a second embodiment showing the sensor in partial cross section.
  • FIG. 4 is a sectional view taken along line 4--4 of FIG. 3, showing the configuration of the openings in a second embodiment of the shield.
  • the senor 10 includes a hollow outer metal shell member 12, with the upper section of the interior being larger in diameter than the lower section, thereby forming a shoulder 14 within the shell.
  • the shoulder thus is generally located intermediate the ends. Threads 16 are used to mount the sensor to the exhaust pipe 18.
  • a zirconia element 20 is positioned on and supported by shoulder 14.
  • Element 20 is hollow and has a thin wall construction 24 that tapers from the thinnest section of the element that begins at a closed small diameter end 22 generally bulbous in shape, and terminates in a thicker section at the opposite end, which end has an enlarged diameter section 26 that forms upper and lower shoulders 27,29 respectively thereon with the zirconia element thereby having a generally conical shape.
  • the lower shoulder 27 is positioned on a metal gasket 28 that is located on shoulder 14.
  • Element 20 has a platinum coating 30 on the inside surface and a platinum coating 32 on the outside surface, with the coatings extending respectively only up to the ends of the upper and lower shoulders.
  • the area 34 between shoulders 27,29 is not platinum coated and thus separates the two platinum coated areas to form an inner electrode 33 and an outer electrode 35 on the zirconia element out of direct electrical contact with each other.
  • the outer electrode 35, metal gasket 28, and grounded outer shell 12 provide for one electrical contact means or circuit portion.
  • a body member 37 is held within the outer shell by the crimped or rolled over top 36 of the shell and ceramic insulator 40, these members being considered as clamping means.
  • a washer or gasket 38 may be positioned between crimp 36 and insulator 40.
  • Body 37 is positioned on a metal gasket 42, located on the upper shoulder 29 and inner electrode 33 of zirconia element 20 to provide a second electrical contact means or circuit portion through terminal connector 44.
  • the contact means are insulated from each other by the ceramic insulator 40 and the circumferential space 46 between the body 37 and the shell. Centerbore 45 is pro vided in the body member 37 extending therethrough to provide a passage for introducing air into the hollow zirconia element.
  • An essential feature of this invention is to include a mica insulating gasket 47 between the bottom of the ceramic insulator 40 and shoulder 49 formed on the body member 37.
  • the mica solves a problem that has been experienced in the past in maintaining a satisfactory mechanical gas-tight seal between the parts. It is essential to preclude any exhaust gases from entering the interior of the zirconia element to avoid contamination of the air within the zirconia element and give a false signal, and further to assure good electrical contact between the electrodes on the zirconia element and the other parts of the sensor.
  • Mica has a thermal expansion coefficient on the order of to times that of the zirconia element, and thereby compensates for the lower expansion of the zirconia element relative to the other metal members.
  • a shield 48 as best seen in FIG. 1 is attached by any convenient means to the outer shell and has a plurality of struck out vane shaped openings 50 that are positioned in the exhaust stream to cause the exhaust gases to reach the zirconia element in an indirect manner, so as not to erode the outer platinum coating.
  • the areas 52 adjacent and leading into the struck out openings are concave to direct the exhaust gases into the openings in a tangential or circular flow path.
  • a second embodiment 60 similar in most respects to that shown in FIG. 1, is shown in FIG. 3 and includes a hollow outer shell 62, that also includes threads 64 to mount the sensor to the exhaust pipe 66.
  • Outer shell 62 includes a shoulder 68 within the shell to position the zirconia element 20.
  • a metal gasket 70 is inserted within the grounded outer shell between the shoulder 68 and shoulder 27 of zirconia element to form a first electrical contact means.
  • a body member 72 having an air entrance opening 77 is inserted within outer shell 62 and rests on a second metal gasket 74 and the upper shoulder 29 of zirconia element 20 to form a second contact means with terminal 73.
  • Body member 72 and zirconia element 20 are clamped within the outer shell member by a nut 75 or similar means that allows easy interchangeability of the zirconia element.
  • a mica insulating gasket 76 that performs the same function as mica insulating gasket 47 is located on a shoulder on body member 72.
  • a shield 78 is attached to the outer shell member 62 and is placed in the exhaust stream in the same manner as the shield described and shown in FIG. 1 and generally has the same configured openings 50 and concave portions 52 leading into openings 50.
  • Shield 78 may be constructed in two sections, a bottom section 80 that is inserted into and attached to the circular body section 82 by welding or edge crimping.
  • Air sensors of the types described above are useful for the operation of equipment that will adjust air-fuel ratios very quickly readily as they become richer or leaner during operation of an automobile. Since such a sensor may be used on most automobiles, it'is essential that the item be made as economically and simply as possible.
  • the sensor as described in the claims is easy to manufacture, is economical and is a simple device that accomplishes the desired objects.
  • An exhaust gas sensor for measuring the relative presence of oxygen in an exhaust system comprising: a hollow metal shell having a shoulder therein, a first metal gasket on said shoulder, a conically shaped hollow zirconia element positioned within said hollow metal shell on said gasket having one end closed and thin Walls tapering from the thinnest section that begins at the closed end and terminates in a thicker section at the opposite end, which end has an enlarged diameter that forms a top shoulder and a bottom shoulder, said zirconia element having a platinum coating on the inside and outside surfaces including the top and bottom shoulders to form inner and outer electrodes on said zirconia element with the enlarged diameter portion between the top and bottom shoulders being uncoated, said bottom shoulder of said zirconia element being in contact with said first metal gasket to form a first electrical contact means between said outer shell and said outer electrode, a second metal gasket on the top shoulder of said zirconia element that provides electrical contact with the inner electrode on said zirconia element and a metal body member placed thereon forming a second
  • An exhaust gas sensor for measuring the relative presence of oxygen in an exhaust system comprising: a hollow metal shell having a shoulder formed on the inner surface thereof intermediate its ends and being adapted to be mounted in an exhaust gas conduit, a first metal gasket on said shoulder, a conically shaped hollow zirconia element positioned within said hollow metal shell and having its small diameter end closed and adapted to be exposed to the exhaust gas, the large diameter open end of said zirconia element being joined with an enlarged diameter portion on the outer surface thereof to form a top shoulder and a bottom shoulder, a platinum coating provided on the inside and outside surfaces of said zirconia element including the top and bottom shoulders to form inner and outer electrodes thereon, the surface of said enlarged diameter portion between said shoulders being uncoated, the bottom shoulder of said zirconia element being positioned in contact with said first metal gasket to complete an electrical path between said metal shell and said outer electrode, a second metal gasket on the top shoulder of said zirconia element to complete an electrical path between the inner electrode and a metal body member positioned thereon
  • An exhaust gas sensor for measuring the relative presence of oxygen in an exhaust system comprising: a hollow metal shell having a shoulder formed on the inner surface thereof intermediate its ends and being adapted to be mounted in an exhaust gas conduit, a first metal gasket on said shoulder, a conically shaped hollow zirconia element positioned within said hollow metal shell and having its small diameter end closed and adapted to be exposed to the exhaust gas, the large diameter open end of said zirconia element being joined with an enlarged diameter portion on the outer surface to form a top shoulder and a bottom shoulder, a platinum coating provided on the inside and outside surfaces of said zirconia element including the top and bottom shoulders to form inner and outer electrodes thereon, the surface of said enlarged diameter portion between said shoulders being uncoated, the bottom shoulder of said zirconia element being positioned in contact with said first metal gasket to complete an electrical path between said metal shell and said outer electrode, a second metal gasket on the top shoulder of said zirconia element to complete an electrical path between the inner electrode and a metal body member positioned thereon,

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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)
US00417724A 1973-11-21 1973-11-21 Air fuel ratio sensor Expired - Lifetime US3844920A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00417724A US3844920A (en) 1973-11-21 1973-11-21 Air fuel ratio sensor
CA211,835A CA1004731A (en) 1973-11-21 1974-10-21 Air-fuel ratio sensor
DE2452924A DE2452924C3 (de) 1973-11-21 1974-11-07 Elektrochemischer MeBfühler
IT54009/74A IT1023229B (it) 1973-11-21 1974-11-12 Dispositivo per rivelare la presenza relativa di ossigeno nello scarico di autoveicoli
FR7438343A FR2251821B1 (enrdf_load_stackoverflow) 1973-11-21 1974-11-21
JP13322874A JPS5331795B2 (enrdf_load_stackoverflow) 1973-11-21 1974-11-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00417724A US3844920A (en) 1973-11-21 1973-11-21 Air fuel ratio sensor

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US3844920A true US3844920A (en) 1974-10-29

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US00417724A Expired - Lifetime US3844920A (en) 1973-11-21 1973-11-21 Air fuel ratio sensor

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US (1) US3844920A (enrdf_load_stackoverflow)
JP (1) JPS5331795B2 (enrdf_load_stackoverflow)
CA (1) CA1004731A (enrdf_load_stackoverflow)
DE (1) DE2452924C3 (enrdf_load_stackoverflow)
FR (1) FR2251821B1 (enrdf_load_stackoverflow)
IT (1) IT1023229B (enrdf_load_stackoverflow)

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US3906721A (en) * 1974-08-22 1975-09-23 Gen Motors Corp Thermoelectric exhaust gas sensor
US3914169A (en) * 1974-11-25 1975-10-21 Du Pont Oxygen detector having a platinum electrode on a zirconia electrolyte
US3940327A (en) * 1975-04-11 1976-02-24 Universal Oil Products Company Oxygen sensing device
US3960693A (en) * 1973-03-28 1976-06-01 Robert Bosch Gmbh Device for electrochemically measuring the concentration of oxygen in combustion gases
US3978006A (en) * 1972-02-10 1976-08-31 Robert Bosch G.M.B.H. Methods for producing oxygen-sensing element, particularly for use with internal combustion engine exhaust emission analysis
FR2305864A1 (fr) * 1975-03-27 1976-10-22 Leeds & Northrup Co Pile galvanique
US3989614A (en) * 1975-01-08 1976-11-02 Tseng Ying Tien Gas sensor
US4019974A (en) * 1975-02-01 1977-04-26 Robert Bosch G.M.B.H. Electrochemical sensor construction
FR2333240A1 (fr) * 1975-11-27 1977-06-24 Bosch Gmbh Robert Sonde de mesure electrochimique pour determiner la teneur en oxygene de gaz d'echappement, notamment de moteurs a combustion interne
US4040930A (en) * 1976-02-05 1977-08-09 Uop Inc. Oxygen sensor
US4057477A (en) * 1973-03-28 1977-11-08 Robert Bosch Gmbh Device for electrochemically measuring the concentration of oxygen in combustion gases
US4063898A (en) * 1976-09-20 1977-12-20 Bailey Meter Company Combustible gases detector
US4076608A (en) * 1976-11-04 1978-02-28 Nissan Motor Company, Limited Oxygen sensor
US4088555A (en) * 1975-10-09 1978-05-09 Nissan Motor Company, Limited Oxygen sensor particularly for use in exhaust system of automotive engine
US4096050A (en) * 1976-09-21 1978-06-20 Toyota Jidosha Kogyo Kabushiki Kaisha Oxygen detector
US4098653A (en) * 1975-02-24 1978-07-04 Nissan Motor Company, Limited Oxygen sensor having protective hood and method of using same
US4123131A (en) * 1977-08-05 1978-10-31 General Motors Corporation Vented electrical connector
US4127464A (en) * 1976-01-23 1978-11-28 Hitachi, Ltd. Sensor for detecting oxygen concentration
US4132615A (en) * 1974-04-05 1979-01-02 Robert Bosch Gmbh Internal combustion engine exhaust gas oxygen sensor and catalyzer combination
US4141813A (en) * 1976-02-19 1979-02-27 Nissan Motor Company, Limited Oxygen sensor particularly useful in exhaust system of automotive engine
US4145272A (en) * 1976-08-23 1979-03-20 Nissan Motor Company, Limited Oxygen sensor
US4154664A (en) * 1976-04-16 1979-05-15 Regie Natinale Des Usines Renault Probe for measuring gaseous components
US4155828A (en) * 1976-09-22 1979-05-22 Nissan Motor Company, Limited Oxygen sensor with a sintered reference source of oxygen
US4157282A (en) * 1974-11-18 1979-06-05 General Motors Corporation Method for maintaining stoichiometric air/fuel mixtures
US4159234A (en) * 1978-02-21 1979-06-26 Bendix Autolite Corporation Oxygen sensor
FR2410822A1 (fr) * 1977-12-05 1979-06-29 Bendix Autolite Corp Detecteur electrochimique de gaz
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US4172247A (en) * 1976-10-18 1979-10-23 Nissan Motor Company, Limited Gas concentration sensing device
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US4184934A (en) * 1978-09-13 1980-01-22 The Bendix Corporation Protective shield having omni-directional diverter for sensing means
US4198279A (en) * 1977-11-10 1980-04-15 Corning Glass Works Oxygen sensor mounting structure
US4199424A (en) * 1978-09-13 1980-04-22 The Bendix Corporation Protective shield for sensing means
US4212720A (en) * 1977-07-20 1980-07-15 Robert Bosch Gmbh Electrically heated electrochemical sensor construction, particularly to determine oxygen concentration in exhaust gases from combustion engines
EP0014090A1 (en) * 1979-01-22 1980-08-06 Ford Motor Company Limited Exhaust gas sensor
US4222840A (en) * 1978-04-03 1980-09-16 General Motors Corporation Heated solid electrolyte oxygen sensor
DE3014877A1 (de) * 1979-04-17 1980-11-06 Gen Motors Corp Verfahren zum aufbringen einer abgas-sauerstoff-sensorelektrode und fuer dieses verfahren geeignete aufbringungsmaske
DE3014870A1 (de) * 1979-04-17 1980-11-06 Gen Motors Corp Verfahren zur herstellung einer abgaselektrode fuer einen abgas-sauerstoffsensor
DE3014871A1 (de) * 1979-04-17 1980-11-06 Gen Motors Corp Elektrodenaufspruehverfahren zur herstellung eines abgas-sauerstoffsensors
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US4244798A (en) * 1979-10-29 1981-01-13 General Motors Corporation Exhaust electrode process for exhaust gas oxygen sensor
US4303490A (en) * 1979-10-29 1981-12-01 General Motors Corporation Exhaust electrode process for exhaust gas oxygen sensor
FR2509050A1 (fr) * 1976-09-10 1983-01-07 Westinghouse Electric Corp Procede de protection des electrodes detectrices d'une cellule electrochimique a electrolyte solide
US4400255A (en) * 1981-06-29 1983-08-23 General Motors Corporation Control of electron bombardment of the exhaust oxygen sensor during electrode sputtering
EP0089630A3 (en) * 1982-03-19 1984-12-19 Hitachi, Ltd. Device for measuring oxygen concentration in exhaust gas
US4521287A (en) * 1984-06-28 1985-06-04 General Motors Corporation High rate sputtering of exhaust oxygen sensor electrode
US4526672A (en) * 1984-03-23 1985-07-02 Axia Incorporated Oxygen sensor
US4668374A (en) * 1986-07-07 1987-05-26 General Motors Corporation Gas sensor and method of fabricating same
US4765881A (en) * 1987-04-13 1988-08-23 Allied Corporation Heated 02 sensor having isolated ground
AU581801B2 (en) * 1986-02-19 1989-03-02 General Motors Corporation Exhaust oxygen sensor with external/internal retainer means
US4824550A (en) * 1987-10-19 1989-04-25 General Motors Corporation Heated solid electrolyte oxygen sensor and securing element therefor
US4880519A (en) * 1988-05-24 1989-11-14 Gte Laboratories Incorporated Gas sensor element
US4897174A (en) * 1988-05-24 1990-01-30 Gte Laboratories Incorporated Gas sensing apparatus
US4900412A (en) * 1988-08-24 1990-02-13 General Motors Corporation Heated solid electrolyte oxygen sensor having unique heater element
EP0390337A3 (en) * 1989-03-31 1991-10-02 General Motors Corporation Oxygen sensor having a flat plate element and heater
US5139639A (en) * 1991-03-08 1992-08-18 General Motors Corporation Electrochemical type exhaust gas oxygen sensor
EP0520528A1 (en) * 1991-06-10 1992-12-30 General Motors Corporation Electrochemical-type exhaust gas oxygen sensor having improved metal to ceramic seal
WO1995030893A1 (de) * 1994-05-05 1995-11-16 Roth-Technik Gmbh & Co. Forschung Für Automobil- Und Umwelttechnik Gassensor
US5859361A (en) * 1996-08-09 1999-01-12 Denso Corporation Air fuel ratio sensor and a method for making the same
US6263748B1 (en) * 1999-10-06 2001-07-24 General Motors Corporation Mechanical method for changing oxygen sensor characteristics
US6315880B1 (en) 1997-10-16 2001-11-13 Mary R. Reidmeyer Chemical plating method, electrolytic cell and automotive oxygen sensor using it
US6358383B2 (en) * 1999-03-25 2002-03-19 Delphi Technologies, Inc. Exhaust constituent sensor and method of packaging the same
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US6682640B2 (en) 2002-06-13 2004-01-27 Delphi Technologies, Inc. Co-fired oxygen sensor elements
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US20040180254A1 (en) * 2001-10-01 2004-09-16 England Diane M. Gasket material for a fuel cell
US20070242728A1 (en) * 2004-11-05 2007-10-18 Emitec Gesellschaft Fur Emissionstechnologie Mbh Protective element for a measuring probe and corresponding measuring probe, honeycomb body and motor vehicle
US20080163623A1 (en) * 2006-05-11 2008-07-10 Toyota Jidosha Kabushiki Kaisha Internal combustion engine
EP2806254A1 (en) * 2013-05-22 2014-11-26 Horiba, Ltd. Fuel consumption measuring instrument
CN107407654A (zh) * 2015-03-24 2017-11-28 株式会社电装 气体传感器
US10132225B2 (en) 2013-08-12 2018-11-20 Horiba, Ltd. Fuel consumption calculation unit, fuel consumption measuring apparatus, and exhaust gas measuring apparatus

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JPS52127102U (enrdf_load_stackoverflow) * 1976-03-24 1977-09-27
JPS53103784U (enrdf_load_stackoverflow) * 1977-01-25 1978-08-21
US4129099A (en) * 1977-04-15 1978-12-12 General Motors Corporation Galvanic exhaust gas sensor with solid electrolyte
JPS5454395U (enrdf_load_stackoverflow) * 1977-09-22 1979-04-14
JPS56102464U (enrdf_load_stackoverflow) * 1980-01-09 1981-08-11
JPS60263853A (ja) * 1984-06-11 1985-12-27 Tokyo Yogyo Co Ltd ガス中の水素または水蒸気濃度検出器
US4624770A (en) * 1984-06-26 1986-11-25 Ngk Spark Plug Co., Ltd. Air-fuel ratio sensor
CA2164438C (en) * 1993-06-04 2002-09-03 Philip D. Pacey Gas detection, identification and elemental and quantitative analysis system
WO2016152621A1 (ja) * 2015-03-24 2016-09-29 株式会社デンソー ガスセンサ

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Cited By (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978006A (en) * 1972-02-10 1976-08-31 Robert Bosch G.M.B.H. Methods for producing oxygen-sensing element, particularly for use with internal combustion engine exhaust emission analysis
US4057477A (en) * 1973-03-28 1977-11-08 Robert Bosch Gmbh Device for electrochemically measuring the concentration of oxygen in combustion gases
US3960693A (en) * 1973-03-28 1976-06-01 Robert Bosch Gmbh Device for electrochemically measuring the concentration of oxygen in combustion gases
US4132615A (en) * 1974-04-05 1979-01-02 Robert Bosch Gmbh Internal combustion engine exhaust gas oxygen sensor and catalyzer combination
US3906721A (en) * 1974-08-22 1975-09-23 Gen Motors Corp Thermoelectric exhaust gas sensor
US4157282A (en) * 1974-11-18 1979-06-05 General Motors Corporation Method for maintaining stoichiometric air/fuel mixtures
US3914169A (en) * 1974-11-25 1975-10-21 Du Pont Oxygen detector having a platinum electrode on a zirconia electrolyte
US3989614A (en) * 1975-01-08 1976-11-02 Tseng Ying Tien Gas sensor
US4019974A (en) * 1975-02-01 1977-04-26 Robert Bosch G.M.B.H. Electrochemical sensor construction
US4098653A (en) * 1975-02-24 1978-07-04 Nissan Motor Company, Limited Oxygen sensor having protective hood and method of using same
FR2305864A1 (fr) * 1975-03-27 1976-10-22 Leeds & Northrup Co Pile galvanique
US3940327A (en) * 1975-04-11 1976-02-24 Universal Oil Products Company Oxygen sensing device
US4088555A (en) * 1975-10-09 1978-05-09 Nissan Motor Company, Limited Oxygen sensor particularly for use in exhaust system of automotive engine
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Also Published As

Publication number Publication date
DE2452924B2 (de) 1978-09-07
DE2452924C3 (de) 1979-05-10
FR2251821A1 (enrdf_load_stackoverflow) 1975-06-13
JPS5331795B2 (enrdf_load_stackoverflow) 1978-09-05
IT1023229B (it) 1978-05-10
DE2452924A1 (de) 1975-06-19
JPS50106691A (enrdf_load_stackoverflow) 1975-08-22
CA1004731A (en) 1977-02-01
FR2251821B1 (enrdf_load_stackoverflow) 1977-11-04

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