With Gas Reference Material Patents (Class 204/427)
  • Patent number: 10388505
    Abstract: A mass spectrometer is disclosed comprising an ion mobility separator for separating ions according to their ion mobility, one or more first devices or stages arranged upstream of the ion mobility separator and a control system. The control system is arranged and adapted to monitor directly or indirectly the operating environment within the ion mobility separator, and to control the operating environment within the ion mobility separator based on the monitoring by controlling one or more gas flows to or within one or more of the one or more first devices or stages.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: August 20, 2019
    Assignee: Micromass UK Limited
    Inventors: Steven Derek Pringle, Farnoush Salarzaei, Nicholas Tomczyk, Jason Lee Wildgoose
  • Patent number: 10145816
    Abstract: A gas sensor element (10) includes a composite ceramic layer (111) having an insulation portion (112) and an electrolyte portion (131) disposed within a through hole (112h), and a first conductor layer (150) extending in a continuous manner on a first insulation main surface (113) as well as on a first electrolyte main surface (133). The electrolyte portion (131) is thinner than the insulation portion (112), and the first electrolyte main surface (133) is located on a thickness-direction inward side DTN. The insulation portion (112) has, on a first insulation main surface side, a protruding portion (122) overlying the first electrolyte main surface (133). The thickness of the protruding portion (122) reduces toward the inward side DR1 of the through hole (112h). The first conductor layer (150) extends in a continuous manner on a protrusion surface (122s) as well as on the first electrolyte main surface (133).
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: December 4, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Takashi Konno, Satoshi Okazaki, Masaki Nakagawa, Haruhiko Shigeta
  • Patent number: 10106767
    Abstract: A transfer device includes at least one pump unit provided for a defined gas transfer between a first, closed-off space of an installation, in particular a photobioreactor installation, and a second space which is separate from the first space. The at least one pump unit is embodied as a selective oxygen pump.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 23, 2018
    Assignee: Airbus DS GmbH
    Inventors: Heinz Hartstein, Peter Kern
  • Patent number: 10090146
    Abstract: A mass spectrometer is disclosed comprising an ion mobility separation device for separating ions according to their ion mobility, a first quadrupole mass filter downstream of the ion mobility separation device, a control system arranged and adapted to scan and/or step the set mass of the first quadrupole mass filter a plurality of times over a first mass to charge ratio range of <±2 amu during the elution time of an ion mobility peak from the ion mobility separation device, and an analyzer or ion detector downstream of the first quadrupole mass filter arranged and adapted to analyze or detect ions so as to acquire multi-dimensional ion mobility-mass to charge ratio data.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: October 2, 2018
    Assignee: MICROMASS UK LIMITED
    Inventors: Martin Raymond Green, Keith Richardson, Jason Lee Wildgoose
  • Patent number: 10088446
    Abstract: A gas sensor device is equipped with a pump cell and a sensor cell. The pump cell works to regulate the concentration of oxygen in a measurement gas space. The sensor cell works to measure an oxygen ion current flowing between a sensor electrode and a reference electrode. The gas sensor device is designed to subtract the oxygen ion current value I2, as measured by the sensor cell a given period of time after spraying of fuel into the internal combustion engine is interrupted, from the oxygen ion current value I1, as measured by the sensor cell when the fuel is being sprayed into the internal combustion engine, to derive the concentration of a given gas component based on the corrected oxygen ion current value I. This results in improved accuracy in determining the concentration of the given gas component.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: October 2, 2018
    Assignee: DENSO CORPORATION
    Inventors: Takashi Araki, Keigo Mizutani
  • Patent number: 10078033
    Abstract: The present description relates generally to methods and systems for detecting thermal aging and blackening in oxygen sensors. Thermal aging and blackening effects may be differentiated based on a monitored change in impedance in each of a pump cell and a Nernst cell of the oxygen sensor following application of an alternating voltage. In response to detection of thermal aging and/or blackening in the oxygen sensor corrective measures may be taken to ensure accurate oxygen estimation using the sensor.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: September 18, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Michael McQuillen, Gopichandra Surnilla, Richard E. Soltis, Daniel A. Makled, John Joseph Virga
  • Patent number: 9989506
    Abstract: Provided is a gas sensor in which a protective cover has no looseness even by repetitive use. The gas sensor includes a sensor element for detecting a predetermined measurement target gas component in a measurement gas; a protective cover which protects a side of one end portion of the sensor element; and a housing which houses the sensor element. The protective cover includes a brim portion at one end portion of an outer surface of the protective cover. The brim portion is brought into contact with a contact surface provided in said housing, and is held between a swaging portion and the contact surface, the swaging portion extending from the contact surface while bending, so that the protective cover is fixed to the housing. The brim portion is tilted at a tilt angle of 5° or more and 15° or less relative to a plane vertical to a central axis of the gas sensor.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 5, 2018
    Assignee: NGK INSULATORS, LTD.
    Inventors: Yusuke Watanabe, Takao Murase, Masashi Yasui
  • Patent number: 9823220
    Abstract: An apparatus and method for individually detecting NO and NO2 concentrations as NOX components of an object gas. An NO concentration corresponding value is obtained from a first detection element not having a reduction section. An NO concentration corresponding value is obtained from a second detection element having a reduction section, and having an NO2/NO sensitivity ratio greater than that of the first detection element. The difference ?C between the NO concentration corresponding values of the two detection elements is obtained, and divided by the difference ?S between the NO2/NO sensitivity ratios of the two detection elements, whereby an NO2 concentration corresponding value is obtained. A value obtained by multiplying the NO2 concentration corresponding value by the NO2/NO sensitivity ratio of the second detection element is subtracted from the NO concentration corresponding value of the second detection element, whereby an NO concentration corresponding value is obtained.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: November 21, 2017
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kenji Kato, Kouji Shiotani, Takeshi Kawai, Satoshi Teramoto
  • Patent number: 9466498
    Abstract: A CMOS gas sensor comprises a membrane (13) extending over an opening (12) of a silicon substrate (1). A patch (2) of sensing material is arranged on the membrane (13) and in contact with electrodes (3) of platinum. A heater (5) of tungsten is located in or on the membrane (13) at the location of the patch (2) of metal-oxide sensing material. Combining platinum electrodes (3) with a tungsten heater (5) on top of a CMOS structure provides a gas sensor of high reliability and stability.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: October 11, 2016
    Assignee: Sensirion AG
    Inventors: Johannes Buhler, Cyrill Kuemin
  • Patent number: 9028671
    Abstract: An apparatus and methods are provided for the accurate determination of hydrogen content in fluid media at elevated temperatures. The apparatus consists of a proton conducting solid electrolyte in contact with an internal metal/hydrogen reference standard, in which the electrolyte and the reference material are in a chemically stable contact. The electrical signal generated is a function of the hydrogen concentration on the measuring side.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: May 12, 2015
    Assignee: Cambridge Enterprise Limited
    Inventors: Derek John Fray, Carsten Schwandt
  • Publication number: 20150041319
    Abstract: An O2 sensor has a sensor element, which includes a solid electrolyte layer and a pair of electrodes. The solid electrolyte layer is held between the electrodes, which includes an atmosphere side electrode and an exhaust side electrode. A constant current circuit is installed in an electric path, which connects between the atmosphere side electrode and a ground, to induce a flow of a predetermined constant electric current between the electrodes through the solid electrolyte layer. When the sensor element generates an electromotive force, the constant current circuit conducts an electric current, which is generated while using the electromotive force of the sensor element as an electric power source, to induce the flow of the predetermined constant electric current between the electrodes in an electromotive force range, which is equal to or larger than an electromotive force of the sensor element generated at a stoichiometric air-to-fuel ratio.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 12, 2015
    Inventors: Yuji YAMADA, Mikiyasu MATSUOKA, Kenichi ONO, Takamasa OGURI, Takao MISHIMA
  • Publication number: 20150041320
    Abstract: An O2 sensor has a sensor element, which includes a solid electrolyte layer and a pair of electrodes. The solid electrolyte layer is held between the electrodes, which includes an atmosphere side electrode and an exhaust side electrode. A constant current circuit is installed in an electric path, which connects between the atmosphere side electrode and a ground, to induce a flow of a predetermined constant electric current between the electrodes through the solid electrolyte layer. A voltage circuit is installed in an electric path, which connects between the exhaust side electrode and a ground, to increase an electric potential of the exhaust side electrode by a predetermined amount relative to an electric potential at an output side of the constant current circuit, from which the electric current flows out of the constant current circuit.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 12, 2015
    Inventors: Yuji YAMADA, Mikiyasu MATSUOKA, Takamasa OGURI, Takao MISHIMA
  • Publication number: 20150021181
    Abstract: Provided is a hydrogen measurement sensor capable of monitoring a content of hydrogen within molten metal in real-time using an aluminum or magnesium alloy casting method, and, more particularly, a hydrogen measurement sensor having a junction structure of a solid oxygen ion conductor and a solid hydrogen ion conductor in molten metal capable of measuring a content of hydrogen within aluminum-magnesium alloy-molten metal using a new method which generates a fixed concentration of oxygen gas from a solid reference material at a high temperature by replacing a reference material of a standard gas method which is difficult to handle with a solid reference material or external air which is easy to handle or has the same effect as that of the gas reference material by using a feature in which the external air contains a predetermined pressure (0.21 atm) of oxygen.
    Type: Application
    Filed: December 6, 2012
    Publication date: January 22, 2015
    Inventors: Chong Ook Park, Byoung Hyo Jung
  • Publication number: 20140353156
    Abstract: An electrochemical gas sensor having an electrode with a catalyst distributed on a porous surface is described. The porous surface can be a polytetrafluoroethylene tape. Alternate embodiments include layered or stacked electrodes.
    Type: Application
    Filed: May 12, 2014
    Publication date: December 4, 2014
    Applicant: LIFE SAFETY DISTRIBUTION AG
    Inventors: Keith Francis Edwin Pratt, John Chapples, Martin Geoffrey Jones
  • Patent number: 8899014
    Abstract: An emission control system for an engine includes a catalyst and an exhaust-gas sensor provided downstream of the catalyst in a flow direction of exhaust gas. The exhaust-gas sensor includes a sensor element that includes a pair of electrodes and a solid electrolyte body located between the electrodes. The emission control system further includes a constant current supply portion that changes an output characteristic of the exhaust-gas sensor by applying a constant current between the electrodes, a rich direction control portion that performs a rich direction control after a fuelling-stop control, and a characteristic control portion that performs a rich responsiveness control during the rich direction control. In the rich direction control, an air-fuel ratio of the exhaust gas is made to be richer. In the rich responsiveness control, the constant current supply portion increases a detection responsiveness of the exhaust-gas sensor with respect to rich gas.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: December 2, 2014
    Assignee: Denso Corporation
    Inventors: Kosuke Nakano, Shingo Nakata, Mikiyasu Matsuoka
  • Patent number: 8900432
    Abstract: A sensor element, which may be used as Lambda probe and/or inside a Lambda probe, for example, is provided for determining at least one physical property of a gas mixture in at least one gas chamber. The sensor element has at least one first electrode, at least one second electrode and at least one solid state electrolyte, which connects the at least one first electrode and the at least one second electrode. The at least one first electrode and the at least one second electrode are situated inside the sensor element. The at least one second electrode is connected to at least one reference gas chamber via at least one discharge air channel.
    Type: Grant
    Filed: November 22, 2007
    Date of Patent: December 2, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Goetz Reinhardt, Henrico Runge, Holger Reinshagen, Lothar Diehl
  • Patent number: 8852415
    Abstract: A sensor element for determining at least one physical property of a gas in a measuring gas chamber, particularly for determining an oxygen concentration in an exhaust gas. The sensor element includes at least one first electrode and at least one second electrode, and at least one solid electrolyte connecting the first electrode and the second electrode. The second electrode is situated on the inside of the sensor element and is able to have gas from the measuring gas chamber applied to it via at least one gas access hole and at least one diffusion barrier. At least partially gas-impermeable cover layer is provided on the diffusion barrier, at least from area to area. The gas access hole has at least one chamfer in the vicinity of the cover layer.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: October 7, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Henrico Runge
  • Publication number: 20140262835
    Abstract: Various embodiments of a gas sensor device and method of fabricating a gas sensor device are provided. In one embodiment a gas sensor device includes a base substrate, an electrolyte layer disposed on the base substrate and a plurality of potentiometric sensor units electrically coupled to the base substrate. Each potentiometric sensor unit includes an electrolyte layer disposed on the base substrate, a sensing electrode comprising tungsten oxide (WO3) and platinum (Pt), a reference electrode comprising Pt, and a plurality of connectors coupled to the plurality of potentiometric sensors to connect the plurality of potentiometric sensors in series.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: THE CLEVELAND CLINIC FOUNDATION
    Inventors: Gary W. Hunter, Carl W. Chang, Prabir K. Dutta, Suvra P. Mondal, Azlin M. Biaggi-Labiosa
  • Publication number: 20140251834
    Abstract: A membrane electrode assembly for a gas sensor is described that includes a membrane disposed between a sensing electrode and a counter electrode. The membrane is a polymer membrane, such as an ionomer, having an ionic liquid retained therein.
    Type: Application
    Filed: October 5, 2011
    Publication date: September 11, 2014
    Applicant: UTC FIRE & SECURITY CORPORATION
    Inventors: Lei Chen, Zhiwei Yang, Jean Yamanis, Georgios S. Zafiris, Joseph J. Sangiovanni
  • Patent number: 8828206
    Abstract: In a gas sensor element, a measurement gas is introduced to a measurement electrode through a porous diffusion-resistant layer. A catalyst layer is formed on an outer surface of the diffusion-resistant layer via which the measurement gas flows into the diffusion-resistant layer. In the catalyst layer, the percentage content of Pt is in the range of 2.5 to 12 mass %, the percentage content of Pd is in the range of 0.4 to 2 mass %, and the percentage content of Rh is in the range of 0.06 to 1.5 mass %. The catalyst layer includes catalytic noble metal particles each of which is made of an alloy that contains at least Pt. For each of the catalytic noble metal particles, the percentage content of Pt at an outer peripheral portion of the catalytic noble metal particle is lower than that at a core portion of the catalytic noble metal particle.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: September 9, 2014
    Assignee: Denso Corporation
    Inventor: Hirokatsu Imagawa
  • Patent number: 8795491
    Abstract: A method of processing a sensor element includes the steps of: (a) preparing a gas atmosphere containing hydrocarbon, having an air-fuel ratio of 0.80 to 0.9999, and having a small amount of oxidizing gas added thereto; and (b) subjecting a sensor element to a heat treatment in the gas atmosphere at a temperature of 500° C. or higher for 15 minutes or longer. The sensor element includes an electrochemical pumping cell constituted of an oxygen-ion conductive solid electrolyte and an electrode having a NOx reduction ability. A NOx gas in a measurement gas is reduced or decomposed in the electrode. A NOx concentration in the measurement gas is obtained based on a current which flows in the electrochemical pumping cell at a time of the reduction or decomposition.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: August 5, 2014
    Assignees: NGK Insulators, Ltd., NGK Ceramic Device Co., Ltd.
    Inventors: Tetsuya Ishikawa, Sumiko Horisaka, Yuji Okuda
  • Patent number: 8783019
    Abstract: An exhaust treatment system is disclosed that can diagnose the performance of an exhaust treatment oxidation catalyst in converting NO to NO2. The exhaust treatment system is fluidly coupled to an internal combustion engine, and includes an oxidation catalyst disposed in an engine exhaust stream; a reductant source for injecting a reductant into the exhaust stream downstream of the oxidation catalyst; an SCR catalyst disposed in the exhaust stream downstream of the reductant source; and a gas sensor, disposed in the exhaust stream downstream of the oxidation catalyst and upstream of the reductant source, comprising a plurality of sensing or pumping cells that measures NO concentration in the exhaust gas and NO2 concentration in the exhaust gas.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: July 22, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Joshua Clifford Bedford, Julian C. Tan, Janean E Kowalkowski
  • Publication number: 20140190828
    Abstract: A first electrode (133) has an exposure portion (133b) exposed to a second measuring chamber (160), and a connection portion (133d) which is disposed at a position not exposed to the second measuring chamber (160) and is connected to the first lead (137) and which is a portion of the first electrode (133) located most distant from the second measuring chamber (160). The entire connection portion (133d) is located in a region A1 which extends from the second measuring chamber (160) over a distance of 1.0 mm or less.
    Type: Application
    Filed: January 3, 2014
    Publication date: July 10, 2014
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro KAMADA, Masaki NAKAGAWA, Koji SHIOTANI
  • Patent number: 8771488
    Abstract: A gas sensor (100) includes an oxygen pump cell (135) and an oxygen-concentration detection cell (150) laminated together with a spacer (145) interposed therebetween. The spacer (145) has a gas detection chamber (145c) which faces electrodes (137, 152) of the cells (135, 150). The oxygen-concentration detection cell (150) produces an output voltage corresponding to the concentration of oxygen in the gas detection chamber (145c). The oxygen pump cell (135) pumps oxygen into and out of the measurement chamber (145c) such that the output voltage of the oxygen-concentration detection cell (150) becomes equal to a predetermined target voltage. A leakage portion mainly formed of zirconia is disposed between which electrically connects the oxygen-concentration detection cell (150) and the oxygen pump cell (135).
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: July 8, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Tetsuya Ito, Satoshi Teramoto, Kentaro Mori
  • Patent number: 8764955
    Abstract: A gas sensor (200) includes a gas sensor element (10) extending in the direction of an axis O, and a housing (50) made of metal, radially surrounding the gas sensor element, and adapted for inserting at least partially into a sensor-mounting hole (350) of a mounting body (300). The gas sensor (200) further includes a resin member (60, 61) which radially surrounds the housing at least partially and having a contact portion (C) in contact with the housing that is at least partially disposed axially frontward with respect to the outer surface of the mounting body (300) around the sensor-mounting hole, and a heat sink member (80) that is in contact with the housing at an axial position the same as or located frontward of the axial position of the front end of the contact portion.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: July 1, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takaya Yoshikawa, Tomohiro Tajima, Hisaharu Nishio, Masao Tsuzuki, Kunihiko Yonezu
  • Patent number: 8747635
    Abstract: A gas sensor is provided with a multilayer body of solid electrolyte layers, a measurement electrode, a reference electrode, a reference gas introduction layer, a detection unit and a heater. The reference electrode and the measurement electrode are formed directly on the same first solid electrolyte layer. Thus, heat from the heater is transferred from a third substrate layer to the first solid electrolyte layer, and also to the reference electrode and the measurement electrode through the same first solid electrolyte layer. The reference electrode is covered with a reference gas introduction layer, formed of a porous body. The transference of heat from the heater to the reference electrode through the reference gas introduction layer is smaller than the transference of heat from the heater to the reference electrode through the first solid electrolyte layer on which the reference electrode is formed directly.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: June 10, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Mika Murakami, Naoya Saito, Tomoya Seimori
  • Patent number: 8721856
    Abstract: A gas sensor control system for a gas sensor having a first, a second, and a third cell. The second cell produces a second cell electric current indicating the concentration of oxygen in gas in which the amount of oxygen has already been controlled by the first cell. The third cell produces a third cell electric current indicating the concentration of a preselected component of the gas in which the amount of oxygen has already been controlled by the first cell. A second cell circuit converts the second cell electric current into a voltage as a second cell current-measured value. A current adjuster produces a flow of an adjustment current as a function of the second cell current-measured value so that a third cell circuit converts the third cell electric current minus the adjustment current into a voltage as representing the concentration of the preselected component of the gas.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: May 13, 2014
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Satoshi Hada, Takayuki Ishikawa, Katsuhide Akimoto
  • Patent number: 8721855
    Abstract: A crimp contact, a gas sensor including the crimp contact for outputting a signal from a sensing portion of a sensor element to an external device, and a method for manufacturing the crimp contact. The crimp contact includes a barrel portion crimped so as to fix a plurality of lead core wires (16) of an electrical lead connected to the external device. A hold portion constituting the barrel portion is formed such that the lead core wires 16 of the electrical lead are disposed in an U-shaped hold portion 77 so as to be crimped between an anvil 120 and a crimper 121. An outer surface of the U-shaped hold portion 77 has a plating layer 85 thereon to thereby constantly secure slidability between a sliding face of the crimper 121 and the outer surface of the U-shaped hold portion 77.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: May 13, 2014
    Assignee: NGK Spark Plug Co. Ltd.
    Inventors: Hisaharu Nishio, Masahiro Asai, Makoto Hishiki
  • Patent number: 8715474
    Abstract: A gas sensor element has a first cell, a second cell, and a solid electrolyte layer having proton conductivity commonly used by the first cell and the second cell. The first cell has a first cathode and a first anode exposed to the target detection gas containing hydrogen atoms. The second cell has a second anode, a second cathode, and a shield layer with which the second anode is covered. A voltage is supplied to the first and second cells. A gas concentration of the target detection gas is calculated on the basis of a difference between a current of the first cell and a current of the second cell because the current in the first cell is a sum of proton conductivity current and an electron conductivity current. The current in the second cell is an electron conductive current only.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: May 6, 2014
    Assignee: Denso Corporation
    Inventors: Keigo Mizutani, Takehiro Watarai, Norikazu Kajiyama
  • Patent number: 8679312
    Abstract: A gas sensor system including a gas sensor; a current control unit; a constant control unit; and a temperature acquisition unit. The gas sensor includes a measurement chamber, a pump cell and an electromotive force cell. The current control unit performs feedback control on current flowing through the pump cell in response to the voltage of the electromotive force cell and in accordance with a control constant which characterizes the feedback control. Further, the constant control unit changes the control constant of the feedback control in accordance with a value (for example, a resistance value of the electromotive force cell) corresponding to the temperature of the gas sensor.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: March 25, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshinori Inoue, Norikazu Ieda
  • Publication number: 20140076725
    Abstract: A gas sensor including a sensor element constituted by an oxygen-ion conductive solid electrolyte as a main component and detecting a predetermined gas component in a measurement gas includes: an external communication part having an opening opened to the outside, and introducing the measurement gas from the outside under a predetermined diffusion resistance; an internal space communicating with the external communication part; a first electrode formed on a surface of the internal space; a second electrode formed in a space different from the internal space; and a pumping cell operable to pump out oxygen existing in the internal space when a predetermined voltage is applied between the first electrode and the second electrode. The thickness of the external communication part is 50% or more and 100% or less of the thickness of the internal space.
    Type: Application
    Filed: November 19, 2013
    Publication date: March 20, 2014
    Applicant: NGK Insulators, Ltd.
    Inventors: Sumiko HORISAKA, Hiroki FUJITA, Mika MURAKAMI, Takashi ITO
  • Patent number: 8673128
    Abstract: A gas sensor element includes an insulating ceramic base, a solid electrolyte body, and a heating element. The solid electrolyte body is disposed in an opening of the insulating ceramic base and has a measuring electrode affixed to one of major surfaces thereof and a reference electrode affixed to the other major surface. The measuring electrode is exposed to gas to be measured. The reference electrode is exposed to a reference gas. The heating element works to activate the solid electrolyte body and is mounted on one of opposed surfaces of the insulating ceramic base on the same side as the major surface of the solid electrolyte body on which the reference electrode is disposed. Specifically, the insulating ceramic base is located between the solid electrolyte body and the heating element, thereby ensuring a desired degree of electric insulation between the heating element and the reference electrode.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 18, 2014
    Assignee: Denso Corporation
    Inventors: Masami Saitou, Namitsugu Fujii, Norikazu Kajiyama
  • Publication number: 20140042025
    Abstract: A gas sensor (1) which can be an air-fuel ratio sensor includes a detection element (71) including a pair of electrodes, one of the paired electrodes being a sensing electrode (87) which is exposed to a gas-to-be-measured, and the other electrode being a reference electrode (95) which functions as an oxygen reference electrode. In the gas sensor (1), the reference electrode (95) is connected to a porous reference electrode lead (97) extending along the surface of a solid electrolyte body (77); the reference electrode lead (97) contains a noble metal as a main component and also contains a ceramic material; and the reference electrode lead (97) has a specific resistance lower than that of the reference electrode (95). The ceramic material has, in a sintered state, a mean primary grain size greater than that of the noble metal.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: NGK Spark Plug Co., Ltd.
    Inventor: Hitoshi FURUTA
  • Patent number: 8632667
    Abstract: A deterioration signal generation device for an oxygen sensor having a power supply different than a power supply connected to an external device, including a connection unit for electrically connecting the ground lines of the respective power supplies; a first acquisition unit for electrically connecting to a first output line at a reference potential side and to a second output line at a sensor potential side of the oxygen sensor, to obtain first and second potentials, respectively; an operation unit that calculates a first differential value between the first and second potentials; a processing unit that performs an operation on the first differential value; a second acquisition unit that acquires a third potential of a first input line at a reference potential side of the external device; and an output unit that generates the deterioration signal by superposing the second differential value on the third potential.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: January 21, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventor: Seiji Maeda
  • Patent number: 8632668
    Abstract: A deterioration signal generation device for an oxygen sensor having a power supply different than a power supply connected to an external device, including a connection unit for electrically connecting the ground lines of the respective power supplies; a first acquisition unit for electrically connecting to a first output line at a reference potential side and to a second output line at a sensor potential side of the oxygen sensor, to obtain first and second potentials, respectively; an operation unit that calculates a first differential value between the first and second potentials; a processing unit that performs an operation on the first differential value; a second acquisition unit that acquires a third potential of a first input line at a reference potential side of the external device; and an output unit that generates the deterioration signal by superposing the second differential value on the third potential.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: January 21, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventor: Seiji Maeda
  • Patent number: 8623188
    Abstract: A gas sensor including a plate-shaped laminate disposed in a housing and fixed thereto via an element passage member and formed by laminating a gas sensor element and a heating element. The gas sensor element includes a plate-shaped solid electrolyte member, and a pair of detection electrodes formed on front and back surfaces thereof and constituting, in cooperation with the solid electrolyte member, a detection section for detecting the concentration of a specific gas. Insulating substrates mainly composed of alumina are provided on opposite sides of the laminate in the laminating direction. Coating layers mainly composed of a first material higher in toughness than alumina are formed on at least portions of outer surfaces of the insulating substrates in the laminating direction, the portions facing the element passage member. The coating layers are not formed on surfaces of the laminate parallel to the laminating direction.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: January 7, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Ai Igarashi, Noboru Furuta
  • Patent number: 8626451
    Abstract: A method and device allow the determination of the concentrations of a plurality of gas species in a gas mixture based on the output signals from a plurality of gas sensors, each of which is sensitive to a plurality of gas species in the gas mixture. The method includes measuring the response of each sensor at a number of levels of each gas in the mixture, determining a mathematical representation of the response characteristics of each sensor, and using the mathematical representation to determine gas concentrations from sensor readings.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 7, 2014
    Assignee: Delphi Technologies, Inc.
    Inventors: Da Yu Wang, David M. Racine, David D. Cabush
  • Patent number: 8623186
    Abstract: A gas sensor control apparatus includes a heater regulating section to control the supply of electricity to a heater included in a gas sensor, an impedance sensing section to sense an impedance of a cell of the gas sensor, and an impedance condition examining section to examine whether the sensed impedance is greater than or equal to a predetermined abnormality judging threshold. The control apparatus further includes a voltage condition examining section to examine whether a maximum effective voltage is applied to the heater, when the impedance is above the predetermined abnormality judging threshold, a duration measuring section to examine whether an application time duration of the maximum effective voltage becomes equal to or longer than a predetermined heater overheat preventing time, and a voltage decreasing section to decrease the heater application voltage to such a lower effective voltage as to hold the temperature of the cell higher than or equal to 500° C.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: January 7, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Akiyoshi Kato, Keiji Suzuki
  • Patent number: 8623187
    Abstract: A gas sensor including a sensor element constituted by an oxygen-ion conductive solid electrolyte as a main component and detecting a predetermined gas component in a measurement gas includes: an external communication part having an opening opened to the outside, and introducing the measurement gas from the outside under a predetermined diffusion resistance; an internal space communicating with the external communication part; a first electrode formed on a surface of the internal space; a second electrode formed in a space different from the internal space; and a pumping cell operable to pump out oxygen existing in the internal space when a predetermined voltage is applied between the first electrode and the second electrode. The thickness of the external communication part is 50% or more and 100% or less of the thickness of the internal space.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: January 7, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Sumiko Horisaka, Hiroki Fujita, Mika Murakami, Takashi Ito
  • Publication number: 20130264223
    Abstract: Method and apparatus for measurement of the oxygen partial pressure or the oxygen content in a measurement gas in at least one measurement cycle using a solid electrolyte cell having at least one oxygen-conducting solid electrolyte, and having at least one reference electrode as well as at least one measurement electrode, wherein the at least one measurement electrode is in communication with the measurement gas and the at least one reference electrode is in communication with a reference gas or reference volume separated from the measurement gas, wherein a current is imposed via the electrodes on the solid electrolyte cell for pump operation and a measurement voltage (UM) is tapped at the electrodes.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 10, 2013
    Applicant: Sensore Electronic GmbH
    Inventors: Peter Seyr, Werner Reiter
  • Patent number: 8495905
    Abstract: A gas concentration detection device includes: a first sensor having a resistance layer exposed to a gas, and an electrode covered by the resistance layer, the first sensor producing an output according to a gas component ratio on the electrode surface; and a second sensor having a pump cell that pumps oxygen into a gas chamber that contains part of the gas or discharges oxygen out of the gas chamber, and a sensor cell that produces an output according to a gas component ratio in the gas within the gas chamber, the second sensor producing an output based on the pump cell current when the pump cell is operated such that the output of the sensor cell is a predetermined value; and a hydrogen concentration detection unit that detects a hydrogen concentration in the gas based on an output difference between the first sensor output and the second sensor output.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: July 30, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keiichiro Aoki
  • Patent number: 8455045
    Abstract: Disclosed is a high sensitive gas sensor using a carbon material containing an ionized metal catalyst and a method of manufacturing the same. The method includes the steps of: (1) preparing a hydroxide solution by dissolving a hydroxide in a distilled water; (2) dissolving a metal catalyst in the hydroxide solution; (3) immersing the carbon material in a solution obtained through step (2) and stirring the carbon material; (4) heat-treating a mixture obtained through step (3); (5) cleaning the heat-treated carbon material obtained through step (4); (6) drying the carbon material cleaned through step (5); and (7) manufacturing the gas sensor by loading the carbon material obtained through step (6) on a substrate. The gas sensor having high sensitivity and responsiveness with respect to a target gas even in a normal temperature is obtained.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: June 4, 2013
    Assignee: Chungnam National Industry Collaboration Foundation
    Inventors: Young Seak Lee, Seok Chang Kang, Sung Kyu Lee, Ji Sun Im
  • Patent number: 8449743
    Abstract: A gas sensor, that represses a manufacturing cost, obtains high responsiveness and can effectively reduce adhesion of water to a sensor element and intrusion of water into the sensor element, is provided. In the gas sensor that has the sensor element mainly containing a solid electrolyte with oxygen ion conductivity and a protective cover arranged to surround the sensor element and detects a predetermined gas component in a measurement gas, the protective cover includes an inner protective cover that is formed into a bottomed cylindrical shape, has a plurality of inner gas distributing holes formed in two rows on its side surface in a longitudinal direction of the sensor element and surrounds one front end of the sensor element, and an outer protective cover that is formed into a bottomed cylindrical shape, has a plurality of outer gas distributing holes on its side surface and surrounds the inner protective cover.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: May 28, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takayuki Sekiya, Kei Kosaka
  • Publication number: 20130092537
    Abstract: The gas sensor element includes an inner space into which a measurement gas is introduce through a diffusion resistor, a first oxygen pump cell, a second oxygen pump cell and a sensor cell. One of the electrodes formed on the opposite surfaces of the solid electrolyte body of the first oxygen pump cell and one of the electrodes formed on the opposite surfaces of the second oxygen pump cell are disposed opposite to each other across from the inner space. The other electrode of the first oxygen pump cell and the other electrode of the second oxygen pump cell are exposed to a common reference oxygen concentration gas.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 18, 2013
    Applicant: DENSO CORPORATION
    Inventors: Keigo MIZUTANI, Norikazu KAJIYAMA
  • Publication number: 20130075255
    Abstract: Disclosed is an electrochemical gas sensor using micro electro mechanical systems (MEMS). The MEMS electrochemical gas sensor includes: a substrate a lower central region of which is etched by a predetermined thickness; a first insulation film formed on the substrate; a heat emitting resistance body formed on the first insulation film; a second insulation film formed on the heat emitting resistance body; a reference electrode formed in an upper central region of the second insulation film; a solid electrolyte formed on the reference electrode; and a detection electrode formed on the solid electrolyte.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 28, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seung Eon Moon, Nak Jin Choi, Hyung Kun Lee, Jae Woo Lee, Woo Seok Yang, Jong Dae Kim
  • Publication number: 20130075256
    Abstract: A gas sensor element includes an insulating ceramic base, a solid electrolyte body, and a heating element. The solid electrolyte body is disposed in an opening of the insulating ceramic base and has a measuring electrode affixed to one of major surfaces thereof and a reference electrode affixed to the other major surface. The measuring electrode is exposed to gas to be measured. The reference electrode is exposed to a reference gas. The heating element works to activate the solid electrolyte body and is mounted on one of opposed surfaces of the insulating ceramic base on the same side as the major surface of the solid electrolyte body on which the reference electrode is disposed. Specifically, the insulating ceramic base is located between the solid electrolyte body and the heating element, thereby ensuring a desired degree of electric insulation between the heating element and the reference electrode.
    Type: Application
    Filed: September 27, 2012
    Publication date: March 28, 2013
    Applicant: DENSO CORPORATION
    Inventor: DENSO CORPORATION
  • Publication number: 20130062203
    Abstract: An ammonia gas sensor (200A) having an oxygen ion conductive solid electrolyte member (22A); a detection electrode (2A) and a reference electrode (4A) which are disposed on the solid electrolyte member; and an intermediate layer (5A) interposing between the detection electrode and the solid electrolyte member; wherein the intermediate layer contains the oxygen ion conductive solid electrolyte component in an amount of 50 wt % or more, and a first metal oxide which is an oxide of at least one metal selected from the group consisting of Co, Mn, Cu, Ni, and Ce, and the detection electrode contains Au in an amount of 70 wt % or higher and no first metal oxide.
    Type: Application
    Filed: September 5, 2012
    Publication date: March 14, 2013
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yoshihiro NAKANO, Shuntaro WATANABE, Shiro KAKIMOTO, Satoshi SUGAYA, Takio KOJIMA
  • Patent number: 8394248
    Abstract: There is provided a control device for a gas sensor. The gas sensor is formed with first and second oxygen pumping cells to define first and second measurement chambers. Under the control of the sensor control device, the first and second oxygen pumping cells effect oxygen pumping actions against the first and second measurement chambers, respectively. The sensor control device is configured to detect currents through the first and second oxygen pumping cells, calculate a correction coefficient by comparison of a detection value of the first oxygen pumping cell current at a known oxygen concentration period with a previously stored reference value, correct the first oxygen pumping cell current by the correction coefficient and determine the concentration of nitrogen oxide in the gas under measurement based on the corrected first oxygen pumping cell current and the detected second oxygen pumping cell current.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: March 12, 2013
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Akihiro Kobayashi, Takayuki Sumi, Yasuhiro Ishiguro, Satoru Abe
  • Patent number: 8377274
    Abstract: A gas sensor including a gas sensor element having a first measurement chamber (16); a first pumping cell (11); a second measurement chamber (18) into which a gas to be measured having a controlled oxygen partial pressure is introduced; and a second pumping cell (13) having a second inner pump electrode (13b) and a second counterpart electrode (13c) pump electrode configured to detect a specific gas component. The second inner pump electrode is made of a material that contains, as a principal ingredient, two kinds of Pt particles having different particle sizes and whose particle size ratio measured by a sedimentation particle-size distribution ranges from 1.75 to 14.2. A mixing ratio between large Pt particles and small Pt particles has a mass ratio of 10/90 to 50/50. A 10 kHz-1 Hz resistance value across the second pumping cell at 600° C. is 150? or less.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: February 19, 2013
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Seiji Ohya, Tomohiro Wakazono, Kenji Kato, Koji Shiotani
  • Patent number: 8366893
    Abstract: A gas sensor including a pump electrode and a method for manufacturing a conductive paste for forming the pump electrode. When the pump electrode constituting an electrochemical pump cell for adjusting an oxygen partial pressure inside a gas sensor to measure a concentration of a gas component in a measurement gas by a current-limiting method is formed of a cermet of a noble metal and an oxide having oxygen ion conductivity, the noble metal contains a first noble metal having a catalytic activity, and a second noble metal having a catalytic activity suppressing ability to suppress the catalytic activity of the first noble metal with respect to an oxide gas except for oxygen, and an abundance ratio of the second noble metal with respect to the first noble metal in a particle surface of the first noble metal existing in the pump electrode is to be 0.01 to 0.3.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: February 5, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Shinji Fujisaki, Aya Sato, Yukimasa Mori, Sumiko Horisaka