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Document Title |
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7628907 |
Gas sensor
A gas sensor is provided for detecting one or more gases in a gas sample. The gas sensor includes a substrate, a solid electrolyte layer including lanthanum oxide for sensing carbon dioxide, a...
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7585402 |
Method of sensor conditioning for improving signal output stability for mixed gas measurements
A method of sensor conditioning is proposed for improving signal output stability and differentiation between responses to different gases such as exhaust from combustion processes. A square wave...
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7578914 |
Gas concentration measuring apparatus designed to compensate for output error
A gas concentration measuring apparatus for use in air-fuel ratio control of motor vehicle engines is provided which is designed to determine the concentrations of oxygen at different resolutions...
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7578925 |
System and method for updating a baseline output of a gas sensor
A method of operating a gas sensor is disclosed, wherein the sensor includes a pumping electrode configuration and a measuring electrode configuration, and wherein the method includes operating the...
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7527718 |
Method of treating gas sensor element
A method of treating a gas sensor element for improving measurement characteristics thereof, including: heating the gas sensor element at a temperature of 600-1000° C. for 3-24 hours in a...
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7384524 |
Detection of carbon monoxide in hydrogen-based gas streams
The present invention relates to a sensor for and a method of detecting carbon monoxide in gas streams containing hydrogen. The sensor acts as a fuel cell and is comprised of a centrally placed...
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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...
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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...
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7306712 |
Gas sensor and method for measuring gas concentration using the same
This invention provides a gas sensor including a proton-conductive polymer electrolyte layer and a method for measuring gas concentration, that are capable of measuring gas concentration at high...
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7285204 |
Apparatus for detecting deterioration of air-fuel ratio sensor
In detecting a deterioration of an air-fuel ratio sensor, a sensor output change speed integrated value is calculated when an element temperature of a solid electrolyte is stabilized at a low...
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7279080 |
Gas sensors
This invention provides an assembly comprising a sensing electrode and a counter electrode in contact with a membrane body formed from a solid polymer electrolyte system comprising a fluorinated...
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7160435 |
Gas sensor and method for controlling the same
Disclosed is a gas sensor for controlling a concentration of oxygen and/or measuring NOx by allowing a current to flow through an ion-conductive member for conducting oxygen ion, by the aid of a...
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7156976 |
Method for detecting and localizing leaks and suitable device for carrying out the method
The invention relates to a method and a device for detecting leaks in the wall of a test object, container or similar, by measuring and evaluating changes that occur in a partial gas pressure. The...
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7153412 |
Electrodes, electrochemical elements, gas sensors, and gas measurement methods
Electrode having high activity to oxygen gas and low activity to flammable gas is provided. An oxygen pump includes oxide-ion conductive solid electrolyte 2 , electrode 8 which is an inactive...
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7144494 |
Circuit arrangement for compensating interference signals in the control loop of a linear lambda probe
A compensation circuit (KS) is provided between the output of a differential amplifier (Diff_Amp) and the input of a controller (R). The compensation circuit generates a compensation signal, whose...
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7052596 |
Linear lambda probe evaluation circuit
The pumping current source (P) required for operating the linear lambda probe is wired in such a manner that its inverting input is connected to the third probe terminal (Vp+), its non-inverting...
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7052595 |
Gas sensor for determining the concentration of gas components in gas mixtures and use thereof
A gas sensor for determining the concentration of gas components in gas mixtures is used in particular to measure the concentration of nitrogen oxides in exhaust gases of internal combustion...
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6994780 |
Gas sensor and method of detecting gas concentration
A gas sensor includes a measurement gas chamber into which a measurement gas is introduced. An oxygen pumping cell adjusts an oxygen concentration in the measurement gas chamber. An oxygen monitor...
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6923902 |
Methods and apparatus for measuring NOx gas concentration, for detecting exhaust gas concentration and for calibrating and controlling gas sensor
A method for detecting the concentration of a specific component in gas discharged from an internal combustion engine, which includes detecting the concentration of the specific component under...
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6911140 |
Gas sensor element and method for determining the concentration of a gas component in a gas mixture
A sensor element and a method for determining the concentration of at least one gas component, especially of a nitrogen oxide, in a gas, mixture. For this purpose, the sensor element includes at...
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6896781 |
Gas sensor with electrically conductive, hydrophobic membranes
A highly accurate, long life, low cost gas sensor is disclosed, particularly useful for measuring carbon monoxide and other toxic gases in an environment. The gas sensor has a first, sensing...
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6890422 |
Oxidizable gas component sensor and method of using the sensor
An electrochemical gas sensor determining the concentration of oxidizable gas components which has an electrochemical measuring cell having a measuring electrode and a reference electrode....
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6849174 |
Gas concentration measuring apparatus designed to minimize error component contained in output
A gas concentration measuring apparatus which has a gas sensor designed to measure, for example, the concentrations of O 2 and HO x contained in exhaust emissions of an automotive engine is...
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6818120 |
O2-sensor fault diagnosis apparatus and method therefor
An O 2 -sensor fault diagnosis apparatus and method therefor, which are capable of detecting wire breaking of an O 2 -sensor with reliability and successively performing fault diagnosis with...
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6797151 |
CO sensor and method of measuring CO concentration
A CO sensor and a CO-concentration measurement method which enables accurate measurement of CO concentration irrespective of the hydrogen concentration of a gas under measurement. By applying a...
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6767449 |
Method for operating a sensor for determining the concentration of oxidizing gases in gas mixtures
Method for operating a sensor for determining the concentration of oxidizing gases in gas mixtures, especially of the nitrogen oxide concentration in exhaust gases of internal combustion engines,...
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6743352 |
Method and apparatus for correcting a gas sensor response for moisture in exhaust gas
A method for detecting the concentration of a specific gas (NOx) in an engine exhaust gas using a gas sensor and a process of correcting the gas sensor. According to the correcting process, the...
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6699383 |
Method for determining a NOx concentration
A thick-film measurement sensor includes two measurement cells and is used to measure the NOx concentration in the exhaust gas from an internal combustion engine. The 1/λ value of the exhaust gas...
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6695964 |
Method and apparatus for measuring NOx gas concentration
Method and sensor for measuring accurate measurement of NOx concentration in an exhaust gas containing O 2 ,H 2 O, CO 2 and NOx and a NOx gas concentration sensor. A first oxygen pump cell...
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6579435 |
Gas sensor
A gas sensor is disclosed comprising an oxygen pump cell having at least one exterior pump electrode and at least one interior pump electrode disposed on opposite sides of a first solid electrolyte...
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6576118 |
Correction device of air-fuel ratio detection apparatus
According to the present invention, there is provided: a sensor element including an oxygen concentration detection section consisting of solid electrolyte for outputting a detection signal...
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6551499 |
Method for monitoring the function of a gas sensor and/or for regenerating the same
This invention provides a method for monitoring the function and/or regeneration of a gas probe. The invention includes a measurement of first and second pump currents of the gas probe and a...
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6551498 |
Lower protective shield for an exhaust sensor and method for making the same
The protective shield arrangement for an exhaust sensor and method of making and using the same is achieved by providing a protective shield for an exhaust gas sensor that comprises a porous mesh...
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6550305 |
Activation diagnosis method and activation diagnosis apparatus for air-fuel ratio sensor
Before starting an air-fuel ratio feedback control utilizing an air-fuel ratio sensor, activation of a wide-range air-fuel ratio sensor in an internal combustion engine is diagnosed by calculating...
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6544405 |
Sensor coating inhibiting glass formation
An exhaust gas sensor element having an electrochemical cell, a protective material in fluid communication with the electrochemical cell, and a reactive inhibitive coating disposed over the...
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6517702 |
Sensor for the analysis of exhaust gases and analysis method
To determine the oxidizable portion of exhaust gases in the presence of the reducible portion with the legally required precision, a method and a sensor are disclosed for analyzing a flow of...
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6495027 |
Electrochemical gas sensor and method for determining gas components
An electrochemical gas sensor and a method for determining the concentration of gaseous components in a gas mixture, particularly of NO x in exhaust gases of internal combustion engines. The gas...
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6488836 |
CO gas sensor and method of using same
A CO gas sensor is equipped with a detecting unit in which a solid electrolyte membrane is held between a detection electrode and a counter electrode, and a voltage applying unit which applies...
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6482310 |
Current control for a pumped air reference oxygen sensor
A method for applying and controlling current applied to an air reference oxygen sensor included in a vehicle exhaust system is disclosed. In an exemplary embodiment of the invention, the method...
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6454931 |
Method for measuring component of a gaseous emission
A modified universal exhaust gas oxygen sensor, referred to herein as a CEGA sensor, is provided which can be used to measure the concentration of a variety of components of a gaseous fuel emission...
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6451187 |
Air/fuel ratio sensor
A detector for an air/fuel ratio sensor, which is comprised of a structure formed by stacking an oxygen reference electrode, a dense zirconia solid electrolyte, a negative electrode, a porous...
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6447660 |
Circuit configuration for controlling a pump current of an exhaust probe in a motor vehicle
A circuit configuration for controlling a pump current includes a microcontroller, an analog circuit and a read-only memory. A pulse-width modulated signal, which is output by the micro-controller,...
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6436277 |
Electrochemical sensor
An electrochemical sensor for ascertaining a gas concentration of a measuring gas includes an electrochemical element, including a first solid electrolyte body having an electrochemical pump cell...
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6432289 |
Oxygen concentration detector
An oxygen concentration detector comprises a solid electrolyte 21 , a sensing element 2 which consists of the solid electrolyte 21 coated on the surface with an outer electrode 23 , a heater ...
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6372120 |
Method for determining a nitrogen oxide concentration
A NO x concentration of a gas is measured with a NO x measuring sensor which has two measuring cells. An oxygen concentration is respectively corrected by a oxygen-ion pumping current. A...
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6365022 |
Gas sensor
A gas sensor comprising an electrolytic cell having detecting and reference electrodes connected by a solid electrolyte. In a first embodiment, both electrodes comprise Ag 2 CO 3 and Ag 4 RbI 5 ,...
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6365036 |
Electrode ink formulation for oxygen sensor
The sensor of the present invention comprises a solid electolyte with an electrode disposed on both sides thereof and an electrical lead connected to each electrode. The solid electrolyte is yttria...
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6355151 |
Gas sensor
A gas sensor is provided for measurement of oxygen and/or the air-to-fuel lambda ratio and hydrocarbons and/or carbon monoxide in gas mixtures. To reliably measure a plurality of gaseous...
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6342151 |
Method of using a gas sensor
A method of measuring oxygen and/or the air-to-fuel lambda ratio and hydrocarbons and/or carbon monoxide in gas mixtures using a gas sensor is provided. To reliably measure a plurality of gaseous...
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6334946 |
Method of stabilizing pump current in gas sensor
A method of stabilizing pump current in a gas sensor through suppression of oscillations of the pump current which result from pulsations of measured gas is provided. The gas sensor includes an...
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