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7608176 |
Gas concentration detecting apparatus
The present invention relates a gas concentration detecting apparatus capable of appropriately making a decision on activation of each of a pump cell, a monitor cell and a sensor cell of its gas...
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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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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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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...
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7501604 |
Sensor element for determining gas components in gas mixtures, and method for manufacturing it
A sensor element for determining the concentration of gas components in gas mixtures, e.g., for determining the oxygen concentration in exhaust gases of combustion engines, includes: at least one...
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7481913 |
High-resolution gas concentration measuring apparatus
A gas concentration measuring apparatus for use in air-fuel ratio control of motor vehicle engines is provided which includes a laminated sensor element and a sensor circuit. The sensor circuit...
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7473340 |
Circuit configuration for operating a linear exhaust-gas probe
A linear exhaust-gas probe has a measuring cell for measuring a gas concentration in a measuring chamber by determining a measuring-cell voltage, and a pump cell for pumping gas by way of a pump...
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7462266 |
Apparatus for detecting concentration of nitrogen oxide
Apparatus for detecting the NOx concentration includes a first measurement chamber 20 communicating with the gas under measurement via a diffusion rate defining layer 4 d and a second...
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7461536 |
Circuit arrangement for operating a gas sensor
A circuit configuration for operating a gas sensor is described, including a reference gas space in which an electrode is situated which is supplied with a reference gas pump current to maintain...
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7455761 |
Nitrogen oxide sensor with attenuated oxygen dependence of the NOx signal
In a method and with a circuit for operating a nitrogen oxide sensor for determining the nitrogen oxide (NOx) concentration in a gas mixture, in particular in post-treatment of an automotive...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7361258 |
Sensor element and gas sensor
A flat limiting-current sensor 10 includes a solid electrolyte substrate 22 , a negative electrode 34 a and a positive electrode 32 a . The negative and positive electrodes 34 a and 32 a ,...
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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...
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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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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...
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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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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...
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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...
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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...
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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 H 2 O and CO. In the hydrogen...
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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...
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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...
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7163609 |
Gas sensor having a laminate comprising solid electrolyte layers and alumina substrate
A gas sensor ( 1 a ) having a laminate including an alumina substrate ( 11 ) having a heating resister ( 115 ) embedded in the alumina substrate ( 11 ); a first oxygen-ion conductive solid...
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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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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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7153402 |
NOx-decomposing electrode and NOx concentration-measuring apparatus
A detecting electrode comprises a first cermet electrode layer formed directly on a solid electrolyte layer and a second cermet electrode layer formed on the first cermet electrode layer. The ratio...
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7153401 |
Current-biased potentiometric NOx sensor for vehicle emissions
A nitrogen oxide sensor system for measuring the amount of nitrogen oxide in a gas. A first electrode is exposed to the gas. An electrolyte is positioned in contact with the first electrode. A...
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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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7122103 |
Air/fuel ratio detection apparatus
The invention relates to an air/fuel ratio detection apparatus for a gas. This apparatus includes (a) a heater portion having an elongate cylindrical shape; (b) a solid electrolyte layer...
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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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7045047 |
Gas sensor element
A gas sensor element which may be employed in measuring the concentration of gas such O 2 , NOx, or CO. The gas sensor element consists of an electrochemical cell made up of a solid electrolyte...
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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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6966978 |
Sensor element of a gas sensor
A solid electrolyte-based sensor element of a gas sensor for determining a gas component in a gas mixture is described, in particular for determining the concentration of oxygen and/or nitrogen...
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6953620 |
Coating system and method for its manufacture and its use
A coating system and a method for its manufacture are provided. An electrically conductive base coat and a porous overcoat lying over the base coat are arranged on a ceramic substrate. At least one...
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6936148 |
Gas sensor element having at least two cells
A sensor element including an insulative base ( 11 ), a heating resistor ( 12 ), an oxygen pump cell ( 13 ), an oxygen detection cell ( 14 ), and a diffusion-chamber-forming member ( 161 ) having a...
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6922639 |
Gas concentration detecting apparatus
A gas concentration detecting apparatus comprises a gas concentration sensor and a gas concentration calculator. The sensor has first to third cells. A gas to be detected is introduced in a chamber...
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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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6901785 |
Gas concentration measuring apparatus designed to minimize measurement error
A gas concentration measuring apparatus has a gas sensor consisting of pump, sensor, and monitor cells. The apparatus works to determine the value of voltage applied to the pump cell when a change...
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6895800 |
Gas concentration measuring apparatus minimizing measurement error
A gas concentration measuring apparatus has a gas sensor including pump, sensor, and monitor cells. The apparatus works to look up a predetermined voltage-to-current relation to determine an...
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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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6888109 |
Heating device
A heating device for a gas sensor, in particular for use in the exhaust gas analysis of internal combustion engines, including a heating element having an electrical resistor layer. The heating...
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