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| Number | Title | Issue Date |
| 8110080 | Method for improving performance and longevity of solid electrolyte gas sensor A method is provided for activating a zirconia oxygen sensor which detects the oxygen concentration of an ambient atmosphere by means of a zirconia element that has a porous electrode formed on both sides of an impervious oxygen ion conductor. An electrical current ... | 02/07/2012 |
| 8097138 | Oxygen partial pressure control apparatuses and methods of using solid electrolytes for oxygen partial pressure control The present invention provides oxygen partial pressure control apparatuses that can control the partial pressure of oxygen in atmospheric gases in processing apparatuses or the like to within the range of 0.2 to 10−30 atm, while maintaining low material... | 01/17/2012 |
| 7981265 | Gas concentration measuring apparatus designed to enhance measurement accuracy in desired range A gas concentration measuring apparatus for use in air-fuel ratio control of automotive engines is designed to determine the concentration of oxygen within a wide and a narrow range using a sensor current flowing through a sensor element. The apparatus includes an a... | 07/19/2011 |
| 7967964 | Single cell sensor for measuring the partial pressure of oxygen A single cell oxygen sensor apparatus and method are disclosed. An yttrium-based stabilized layer having electrical terminals connected to the yttrium-based stabilized layer can be provided on a substrate, wherein the yttrium-based stabilized layer is excitable by a... | 06/28/2011 |
| 7964073 | Air fuel ratio detection apparatus Using a gas detection voltage Vs output from a terminal CU, a determination is made at to whether, after startup of an air-fuel ratio detection apparatus (1), a full-range air-fuel ratio sensor (10) has reached a semi-activated state in which a determi... | 06/21/2011 |
| 7959778 | Sensor control apparatus and method A sensor control apparatus comprising an air/fuel ratio sensor having a sensor cell with a pair of electrodes, a current source capable of supplying a predetermined current between the electrodes, a current control section that turns on/off the current source, a vol... | 06/14/2011 |
| 7524407 | Gas sensor An oxygen sensor 10 includes an oxygen detection element 20, which assumes a hollow tubular shape extending along the axis. The oxygen detection element 20 has a closed tip end and an opened rear end. An internal electrode layer 23 is for... | 04/28/2009 |
| 7449092 | Dual mode oxygen sensor An oxygen sensor for measuring exhaust gases of an internal combustion engine is described. The sensor provides an output that has a high gain near the stoichiometric air-fuel ratio, and a lower gain in the lean and rich air-fuel ratio regions. Further, the sensor p... | 11/11/2008 |
| 7445699 | Gas sensor A gas sensor for detecting at least one physical magnitude of a gas, in particular of exhaust gases of an internal combustion engine, is proposed, which includes a sensor element having an electrochemical cell. The electrochemical cell includes a first solid electro... | 11/04/2008 |
| 7438791 | Concentration detector A concentration detector comprises oxygen-forming means for forming oxygen by decomposing the particular component in the gas, first output means for producing an output value proportional to the oxygen concentration in the gas of before oxygen is formed by the oxyg... | 10/21/2008 |
| 7427347 | Method for operating a measuring probe for measuring a gas concentration In a method for operating a measuring probe for measuring a gas concentration in a measuring gas with the aid of a solid electrolyte which conducts oxygen ions and has a measurement cavity for holding the measuring gas, a measuring electrode and an external electrod... | 09/23/2008 |
| 7418957 | Vehicle control method and vehicle control apparatus A vehicle control apparatus and methodology relate to an exhaust gas sensor and sensor heater associated with an exhaust passage of a vehicle engine. The exhaust gas sensor is selectively heated to an applicable activation temperature by the heater so that the senso... | 09/02/2008 |
| 7416651 | Gas sensor There is provided a gas sensor for measuring the concentration of a specific gas component in a gas under measurement, including a gas diffusion rate limiting portion, a measurement chamber communicating with an atmosphere of the gas under measurement through the ga... | 08/26/2008 |
| 7416649 | Oxygen concentration detection system and vehicle control system having the same An oxygen concentration detection system including an oxygen sensor which outputs a plurality of types of measurement signals and anomaly detection means and modification means. The anomaly detection means detects a sensor anomaly by determining whether the respecti... | 08/26/2008 |
| 7416650 | Gas concentration measuring apparatus In a gas concentration measuring apparatus, a measurement substrate is provided. A conductive pattern portion is formed in the measurement substrate. The conductive pattern portion includes a signal input pattern constituting the signal processing circuit and electr... | 08/26/2008 |
| 7361258 | Sensor element and gas sensor A flat limiting-current sensor 10 includes a solid electrolyte substrate 22, a negative electrode 34a and a positive electrode 32a. The negative and positive electrodes 34a and 32a, respectively, ... | 04/22/2008 |
| 7351318 | Gas sensing element A gas sensing element has at least a sensor cell consisting of a measured gas side electrode positioned in a measured gas chamber, a reference electrode being operative association with the measured gas side electrode, and a solid electrolytic substrate having surfa... | 04/01/2008 |
| 7338592 | Diagnostic and control methods for internally calibrated oxygen sensor A set of methods controls the pumping action of and provides leak checking of a solid electrolyte oxygen sensor having internal and external electrodes. A first method performs a leak check on the sensor by forcing the sensor internal reference chamber to an evacuat... | 03/04/2008 |
| 7325393 | Deterioration diagnosing device and diagnosing method for exhaust gas purification catalyst To determine whether an exhaust gas purification catalyst (42) of an engine (1) has deteriorated, a characteristic of exhaust gas on an upstream side of the catalyst (42) is detected, a characteristic of the exhaust gas on a downstream side of t... | 02/05/2008 |
| 7320746 | Concentration detector A concentration detector for detecting the concentration of a particular component in a gas based upon the amount of oxygen formed by the decomposition of the particular component, comprising oxygen-forming means for forming oxygen by decomposing the above particula... | 01/22/2008 |
| 7316767 | Gas sensing element Provided is a multilayer gas sensing element having a high measurement accuracy and less susceptible to a leakage current. The element comprises an oxygen pump cell for adjusting an oxygen concentration in a measured gas chamber, a sensor cell for detecting a specif... | 01/08/2008 |
| 7309415 | Gas sensor and method for measuring a gas component in a gas mixture A gas sensor based on solid electrolyte is proposed for measuring a gas component in a gas mixture, having at least one sensitive region, which has a first means for producing a reaction gas from an additional gas component of the gas mixture. A second means is situ... | 12/18/2007 |
| 7306708 | Limiting current type oxygen sensor In a limiting current type oxygen sensor, a plane cathode layer and a plane anode layer are arranged on both sides of a solid electrolyte layer, and a porous diffusion layer for controlling gaseous diffusion rate is arranged on the other side of the cathode layer. A... | 12/11/2007 |
| 7305299 | Device and method of controlling exhaust gas sensor temperature, and recording medium for exhaust gas sensor temperature control program An apparatus for controlling temperature of an exhaust gas sensor can include a temperature estimating device for sequentially estimating the temperature of an active element based on a predetermined element temperature model, which is representative of a temperatur... | 12/04/2007 |
| 7294252 | NOx sensor and methods of using the same Disclosed herein are NOx sensors and methods of using the same. In one embodiment, a method for sensing NOx comprises: contacting a first NOx electrode with the gas, contacting a second NOx electrode with the gas, determining a NO2 emf between the first N... | 11/13/2007 |
| 7291503 | Reversible resistivity-based sensors One aspect of the present invention relates to a method for detecting the presence of an analyte by comparing the conductivity of a mixture containing an analyte and a sensor to the conductivity of the sensor in the absence of analyte. In certain embodiments, the se... | 11/06/2007 |
| 7288175 | Noiseless gas concentration measurement apparatus A noiseless circuit structure of a gas concentration measuring apparatus is provided. The gas concentration measuring apparatus includes a control circuit and a gas sensor including a solid electrolyte body, a cell, and a heater serving to heat the solid electrolyte... | 10/30/2007 |
| 7279133 | Planar sensor and a method for measuring the temperature of same In a planar oxygen sensor having a pump cell, a reference cell, a sensor chamber and a heating device, a ground plane electrode is provided and includes a sensing portion having a first sense lead and a second sense lead and a measuring portion having a first measur... | 10/09/2007 |
| 7276141 | Hydrogen gas sensor A hydrogen gas sensor capable of accurately measuring hydrogen concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as H2O and CO. In the hydrogen gas sensor, the flow sectional area of a diffusion-rate lim... | 10/02/2007 |
| 7270550 | Board to board connector A board to board connector includes a dielectric housing and a plurality of terminals. The dielectric housing has an upper surface, a bottom surface and a plurality of terminal passages which pass through the upper surface and the bottom surface. Each terminal is re... | 09/18/2007 |
| 7264778 | Carbon monoxide sensor and method of use thereof Carbon monoxide sensors suitable for use in hydrogen feed streams and methods of use thereof are disclosed. The sensors are palladium metal/insulator/semiconductor (Pd-MIS) sensors which may possess a gate metal layer having uniform, Type 1, or non-uniform, Type 2, ... | 09/04/2007 |
| 7258772 | Oxygen sensor and method of manufacturing same In an oxygen sensor that measures a limiting current of when a voltage is applied between pumping electrodes, and also performs a rich/lean judgment based on an electromotive force generated between one of the pumping electrodes and a reference electrode, an oxygen ... | 08/21/2007 |
| 7258771 | Air/fuel ratio detection apparatus The invention relates to an air/fuel ratio detection apparatus. This apparatus includes (a) a heater portion having an elongate cylindrical shape and heating by applying electricity thereto from outside; (b) a solid electrolyte layer surrounding the heater portion a... | 08/21/2007 |
| 7252748 | NOx measurement apparatus NOx sensor element of oxygen-ion conductive solid electrolyte body 15; flow passage (7, 5, 8, 6) provided within the body for introducing analyte gas; oxygen partial pressure detection cell 3; first oxygen pump cell 1 for controlling oxyg... | 08/07/2007 |
| 7241477 | Methods of treating electrodes and gas sensors comprising the electrodes A method for forming an electrode comprises: combining a platinum precursor with a gold precursor to form an electrode ink; forming the electrode ink into an electrode precursor; firing the electrode precursor to form the electrode; treating the electrode in an envi... | 07/10/2007 |
| 7241131 | Thick film heater apparatus A thick-film electric heater having thick-film layers applied directly on a thermally conductive non-flat substrate. Preferably, the substrate is cylindrically shaped. A dielectric layer is silk-screened on the substrate surface. A resistive layer is silk-screened o... | 07/10/2007 |
| 7227169 | Programmable surface control devices and method of making same Programmable surface control devices whose physical features, such as surface characteristics and mass distribution, are controlled by the presence or absence of an electrodeposition of metal and/or metal ions from a solid solution upon application of a suitable ele... | 06/05/2007 |
| 7217355 | Nogas sensor method and device The present invention is a method and apparatus for measuring the total NOx concentration in a gas stream utilizing the principles of a NOx sensor, i.e., mixed potential sensor. The exhaust gas is first conditioned by a catalyst assembly that c... | 05/15/2007 |
| 7214333 | Electrodes for solid state gas sensor A mixed potential electrochemical sensor for the detection of gases has a ceria-based electrolyte with a surface for exposing to the gases to be detected, and with a reference wire electrode and a sensing wire electrode extending through the surface and fixed within... | 05/08/2007 |
| 7201831 | Impurity detection device There is provided a sample preparation device and method for preparing a sample of liquid for detection of impurities. First (40) and second (38) electrodes are provided, located for immersion in a liquid under test. A semipermeable membrane (42... | 04/10/2007 |
