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| Number | Title | Issue Date |
| 7302834 | Method for supplying an internal combustion engine with conditioned combustion gas, device for carrying out said method, method for determining the quantities of pollutants in the exhaust gases of an internal combustion engine, and device for carrying out said method A method and apparatus for determining the quantities of pollutants in the exhaust gases of internal combustion engines wherein an essentially constant and fully conditioned quantity of humidity and/or temperature-conditioned combustion gas is supplied to the intern... | 12/04/2007 |
| 7255836 | Analytical sensitivity enhancement by catalytic transformation A device and method for quantifying an impurity in an input gas stream. The device and method employ a catalyst to convert the impurity to a detectable species in an output gas stream, and the concentration of the detectable species is then measured by means of a de... | 08/14/2007 |
| 7211222 | Gas sensor A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000... | 05/01/2007 |
| 7198952 | Catalyst deterioration detecting apparatus and method An upstream side catalyst and a downstream side catalyst are disposed in an exhaust passage. A first oxygen sensor is disposed between these two catalysts and a second oxygen sensor is disposed downstream of the downstream side catalyst. The air-fuel ratio is forcib... | 04/03/2007 |
| 7071002 | Method and system for vehicle emission testing A method and system for vehicle emission testing measures pollutant concentration, but then provides for conversion of the measured pollutant concentration into its corresponding pollutant mass, thereby allowing for the calculation of a vehicle's emission test score... | 07/04/2006 |
| 7048891 | Catalyst deterioration detecting apparatus A heat generation amount qr/r per unit flow amount of combustible substances supplied to a catalyst is estimated based on upstream and downstream temperature information and supplemental engine information. A deteriorated condition of the catalyst is detected based ... | 05/23/2006 |
| 6933151 | Diagnostic system for monitoring catalyst performance A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to d... | 08/23/2005 |
| 6916664 | Flammable vapor sensor A method and apparatus for sensing a flammable vapor are described herein. Initially, a first thermal conductivity of a vapor at a first temperature and a second thermal conductivity of the vapor at a second temperature can be determined. Thereafter, a ratio of the ... | 07/12/2005 |
| 6913731 | Oxygen probe Intended for application on ducts through which flow a fluid at a high temperature, and particularly at a high pressure, comprising two bodies (4) and (8) which axially screw onto each other, one body (4) provided with a threaded neck (5)... | 07/05/2005 |
| 6806092 | Combustion gas detection system A combustion gas detection apparatus includes a transparent tube partially filled with a combustion gas sensing fluid and an inlet fitting for engagement with the radiator cap of an engine cooling system and an outlet fitting connected with a vacuum port of the engi... | 10/19/2004 |
| 6803236 | Diagnostic system for monitoring catalyst performance A diagnostic system for monitoring catalyst performance in an exhaust system comprises a plurality of treatment devices catalytically treating an exhaust gas stream, and a plurality of gas sensors for monitoring the catalyst performance of the treatment devices to d... | 10/12/2004 |
| 6780378 | Method for measuring concentrations of gases and vapors using controlled flames A method and apparatus for measuring the concentration of at least one gaseous component and/or vaporous component of a gaseous mixture in which a controlled sensor flame is introduced into the gaseous mixture and at least one narrow spectral band in the controlled ... | 08/24/2004 |
| 6719950 | Miniaturized exhaust gas sensor An exhaust gas sensor includes a housing and a sensor element supported by the housing. The sensor element includes a support member having an exhaust side, a reference side, and an aperture extending through the support member between the exhaust side and the refer... | 04/13/2004 |
| 6673619 | Catalyst deterioration detecting device and catalyst deterioration detecting method A catalyst deterioration detecting device of the invention has exhaust emission purifying catalyst on an exhaust passage of an internal combustion engine and air-fuel ratio sensors provided upstream and downstream of the exhaust emission purifying catalys... | 01/06/2004 |
| 6623975 | Method and system for vehicle emission testing A method and system for vehicle emission testing measures pollutant concentration, but then provides for conversion of the measured pollutant concentration into its corresponding pollutant mass, thereby allowing for the calculation of a vehicle's emission... | 09/23/2003 |
| 6344173 | Automotive hydrocarbon sensor A sensor for measuring the non-methane HC concentration of gas sample, e.g., automotive exhaust gas, the sensor comprises a sensor base, capable of producing a output signal representative of the exothermic effect of the hydrocarbon species in the gas sam... | 02/05/2002 |
| 6319429 | Oxygen sensitive resistance material Oxygen sensitive resistance materials for use with oxygen sensors, in particular λ probes are described. These materials are based on the fact that with complex metal oxides it is possible--by adding suitable doping substances--to achieve a negligible te... | 11/20/2001 |
| 6287519 | Hand-held vehicle exhaust analyzer A hand-held vehicle exhaust analyzer for testing gas content in exhaust emitted from a vehicle is disclosed. The vehicle exhaust analyzer is of a size and weight to be held in a user's hands. The system includes a housing with an inlet receiving exhaust e... | 09/11/2001 |
| 6242263 | Automotive hydrocarbon sensor A system for measuring the non-methane HC concentration of gas sample, e.g., automotive exhaust gas, comprises a sensor catalyst capable of selectively oxidizing the combination of CO+H2 +alkene hydrocarbons in a gas sample and a catalytic diff... | 06/05/2001 |
| 6242723 | Apparatus for performing chemical and physical processes without sample transfer within a microwave radiation field Disclosed is an apparatus for use within a microwave radiation field which enables the operator to perform successively a plurality of chemical or physical processes while the apparatus remains in the microwave cavity. The apparatus according to the inven... | 06/05/2001 |
| 6133042 | Modulated oxygen-flux method and apparatus to improve the performance of a calorimetric gas sensor A method and apparatus is provided for modulating the flux of oxygen impinging on a calorimetric gas sensor. The method and apparatus are based on modulating the oxygen concentration of a gas mixture presented to the microcalorimeter between a predetermin... | 10/17/2000 |
| 6129895 | Fuel additive analyzer system and process An oxygenate additive analyzer is provided which detects and determines the presence of oxygen enhancing additives in gasoline or other fuels. The oxygenate additive analyzer includes a portable electronic controller with a fuel cell connected to the cont... | 10/10/2000 |
| 6046054 | Semiconducting oxide gas sensors The selectivity of response of resistive gas sensors to specific gases or vapors is improved by the selection of specified gas-sensitive materials which are not previously known for the applications described, which include detection of hydrocarbons in th... | 04/04/2000 |
| 6037183 | Automotive hydrocarbon sensor system A system for measuring the non-methane HC concentration of gas sample, e.g. automotive exhaust gas, comprising first and second catalytic differential calorimetric sensors. The first catalytic differential calorimetric sensor is capable of producing a fir... | 03/14/2000 |
| 5993743 | Hand-held vehicle exhaust analyzer A vehicle gas analyzing system for testing gas content in exhaust emitted from a vehicle is disclosed. The vehicle gas analyzing system is of a size and weight to be held in a user's hands. The system includes a housing having outer dimensions no greater ... | 11/30/1999 |
| 5980833 | Carbon monoxide sensor A carbon monoxide sensor including a gas detecting portion and at least a pair of electrodes, wherein the gas detecting portion includes a metal oxide represented by a following formula; Cu1-x Bix Oy (0 | 11/09/1999 |
| 5972296 | Oxygen sensors made of alkaline-earth-doped lanthanum ferrites and method of use thereof Oxygen sensor for measuring resistance as a function of oxygen partial pressure, made of alkaline-earth-doped perovskitic lanthanum ferrites with the general formula La1-x Mex FeO3-δ where Me is one of alkaline earth metals, M... | 10/26/1999 |
| 5942674 | Method for detecting oxygen partial pressure using a phase-transformation sensor The invention is a sensing method and an oxygen sensor for detecting a change of oxygen partial pressure in an ambient atmosphere through a change of a measurable physical property of a sensing material. The sensor includes a sensing material selected fro... | 08/24/1999 |
| 5911953 | Apparatus for detecting and analyzing adsorbates A solid object carrying a catalyzer thereon is placed in a closed reaction chamber into which test gases are supplied and is heated up to a temperature of 1000° C. Adsorbates are formed on the surface of the solid object under the test gas flow in the cl... | 06/15/1999 |
| 5824271 | Gas sensor A substrate carrying a first electrode and a second electrode, the first and second electrodes being disposed adjacent to one another, the first electrode being disposed between the substrate and a gas-sensitive component, the gas sensitive component comp... | 10/20/1998 |
| 5810984 | Nitrogen oxide sensor and method of manufacturing the sensor A nitrogen oxide sensor and a method of manufacturing the sensor are disclosed. The sensor has a gas detecting portion including sensitive material having electric property thereof subject to change in association with presence of nitrogen oxide in gas an... | 09/22/1998 |
| 5798269 | Method for detecting change in oxygen partial pressure based on metal/metal oxide phase transformations The invention is a sensing method and an oxygen sensor for detecting a change of oxygen partial pressure in an ambient atmosphere. The sensor includes a sensing material selected from metal or its oxides which, when at an elevated temperature and exposed ... | 08/25/1998 |
| 5792666 | Oxygen sensor based on non-doped cuprate Cuprate mixed oxides having the general formula Ln2 CuO4+y, in which Ln stands for at least lanthanum or a trivalent element from the group of rare earths with atomic numbers from 58 to 71, and the O2 stoichiometric deviat... | 08/11/1998 |
| 5772965 | Method and system for detecting deterioration of exhaust gas control catalyst A system for detecting deterioration of an exhaust gas control catalyst provided in an exhaust gas passage through which a combustion exhaust gas is discharged, including a processing zone communicating with a portion of the passage which is downstream of... | 06/30/1998 |
| 5753185 | Vehicle emissions testing system There is provided an emission testing system which maintains system integrity and which can be manufactured at less cost than current standard emission testing systems. The system includes a sampling unit for collecting emissions from a vehicle and diluti... | 05/19/1998 |
| 5750408 | Method of modifying an automotive type oxygen sensor for use in an industrial process analyzer In an oxygen analyzer for an industrial process, an automotive type oxygen sensor has a sensor element assembly with an outer thin walled shield containing insulation and surrounding the sensor element of the automotive type oxygen sensor.... | 05/12/1998 |
| 5742516 | Indoor air quality and ventilation assessment monitoring device A monitoring device system and a method for controlling ventilation in an enclosed or confined environment by regulating the effective ventilation rate, air exchange rate, mixing factors, stratification of air within the confined area, the percentage of o... | 04/21/1998 |
| 5736104 | Transition metal oxide based calorimetric non-methane hydrocarbon sensor and method A transition metal oxide based calorimetric non-methane hydrocarbon sensor (100) is constructed by disposing a transition metal based catalyst (105), preferably chromium oxide (Cr2 O3), onto a carrier (101). A temperature measurement... | 04/07/1998 |
| 5734091 | Method of manufacturing nitrogen oxide sensor, and nitrogen oxide sensor manufactured by the method and material therefor A method of manufacturing a nitrogen oxide sensor for detecting a nitrogen oxide to be used in the field of e.g. reducing or decomposing nitrogen oxides, as well as such sensor and material suitable for manufacturing the sensor are disclosed. For manufact... | 03/31/1998 |
| 5693877 | Evaluating method for NOx eliminating catalyst, an evaluating apparatus therefor, and an efficiency controlling method therefor In order to prevent a catalyst for an internal combustion engine from experiencing decreased efficiency by deterioration after long time use of the catalyst, the decreased efficiency of the catalyst is determined, and the internal engine is controlled bas... | 12/02/1997 |
