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公开(公告)号：US20200292422A1
公开(公告)日：2020-09-17
申请号：US16885648
申请日：2020-05-28
申请人： DENSO CORPORATION
发明人： Yuto TAMEI , Takashi ARAKI , Hirofumi NODA , Takehito KIMATA , Koichi YOSHIDA
IPC分类号： G01N1/22 , G01N27/04 , G01N15/06 , G01D11/24 , G01N27/407
摘要： A sensor device includes an element cover at the tip end of a housing, retaining a sensor element. An outer cover is provided with outer side holes, with the tip position of the outer side holes being farther toward the tip end than is the tip position of an inner cover, and a first flow passage having a gas flow direction that is at right angles to the axial direction is formed at the inner side of the outer cover. An inner side hole in the inner cover is open to a second flow passage provided between the side surfaces of the inner cover and the outer cover, and a detection surface of the sensor element is located on an extension line in an extension direction of a guide member which extends obliquely into the interior of the inner cover from the tip-position edge of the inner side hole.
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公开(公告)号：US20180224396A1
公开(公告)日：2018-08-09
申请号：US15947037
申请日：2018-04-06
申请人： DENSO CORPORATION
发明人： Yuusuke TOUDOU , Takehito KIMATA , Toru KATAFUCHI
IPC分类号： G01N27/417 , G01N27/419 , G01N27/407
CPC分类号： G01N27/4175 , G01N27/407 , G01N27/419
摘要： A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.
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公开(公告)号：US20170045471A1
公开(公告)日：2017-02-16
申请号：US15305410
申请日：2015-04-01
申请人： DENSO CORPORATION
发明人： Eriko MAEDA , Keigo MIZUTANI , Takehito KIMATA , Yuusuke TOUDOU
IPC分类号： G01N27/407 , G01N27/416
CPC分类号： G01N27/407 , G01N27/4074 , G01N27/416 , G01N27/419
摘要： A NOx concentration measurement system has a NOx sensor, a detection section, a NH3 concentration estimation section and a calculation section. The NOx sensor measures a sum concentration c4 of a concentration of NOx (a concentration c1 of combustion derived NOx) in exhaust gas g, and a concentration of NO (concentration c3 of derived NO which has been derived from NH3) oxidized from NH3. The calculation section calculates the concentration c3 of derived NO by using a concentration c2 of NH3 contained in outside exhaust gas which is present around the NOx sensor, not inside of the NOx sensor, and at least one of an air fuel ratio A/F, a concentration of O2 and a concentration of H2O. The concentration c1 of the is calculated based on the sum concentration c4 and the concentration c3 of derived NO.
摘要翻译： NOx浓度测定系统具有NOx传感器，检测部，NH 3浓度推定部和运算部。 NOx传感器测量排气g中的NOx浓度（燃烧得到的NOx的浓度c1）和从NH 3氧化的NO（源自NH 3的NO的浓度c3）的浓度的总和浓度c4。 计算部使用NO x传感器周围的NO x传感器周围的NOx排出浓度c2，而不是NOx传感器内部，计算出导出的NO的浓度c3，空气燃料比A / F， O2浓度和H2O浓度。 基于总浓度c4和导出的NO的浓度c3计算浓度c1。
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公开(公告)号：US20180252671A1
公开(公告)日：2018-09-06
申请号：US15759297
申请日：2016-09-09
申请人： DENSO CORPORATION
IPC分类号： G01N27/407 , G01N27/41 , G01N27/406
CPC分类号： G01N27/4077 , G01N27/4067 , G01N27/41
摘要： A gas sensor is equipped with a sensor element which detects a specific gas concentration within a gas that is being measured, a housing having the sensor element disposed in the interior thereof and retained therein, and an element cover disposed at an axial-direction tip end of the housing. The tip of the sensor element is provided with a gas introduction part. The element cover has an inner cover and an outer cover, with a space opened between the inner cover and outer cover. Inner side flow holes provided in the inner cover are disposed closer to an axial-direction base end than is a tapered-diameter step part. The distance between the tip of the sensor element and the inner-side flow holes of the inner cover, with respect to an axial direction, is less than or equal to 1.6 mm.
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公开(公告)号：US20170191957A1
公开(公告)日：2017-07-06
申请号：US15325206
申请日：2015-07-08
申请人： DENSO CORPORATION
IPC分类号： G01N27/41 , G01N27/407
CPC分类号： G01N27/41 , G01N27/4071 , G01N27/4074
摘要： A gas sensor device is equipped with the sensor cell, the pump cell, the inner void space, and the gas inlet. The sensor cell is created by a portion of the solid electrolyte body and a pair of sensor electrodes disposed on the solid electrolyte body. The pump cell is created by a portion of the solid electrolyte body and a pair of pump electrodes disposed on the solid electrolyte body. The inner void space faces the sensor electrode and the pump electrode. If a dimension of said gas inlet in a direction in which the measurement gas flows in the gas inlet is defined as L1, a sectional area of the gas inlet taken perpendicular to the direction of flow of the measurement gas in the gas inlet is defined as S1, a distance between the gas inlet and the sensor cell is defined as L2, and a sectional area of the inner void space taken perpendicular to a direction in which the pump cell and the sensor cell are aligned with each other is defined as S2, a relation of 1000≦(L1/S1)×(L2/S2)≦5000 is met.
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公开(公告)号：US20170184536A1
公开(公告)日：2017-06-29
申请号：US15388181
申请日：2016-12-22
申请人： DENSO CORPORATION
发明人： Yusuke KAWAMOTO , Toru KATAFUCHI , Takehito KIMATA , Ryozo KAYAMA
IPC分类号： G01N27/406 , G01N27/407
CPC分类号： G01N27/4065 , G01N27/4074 , G01N27/4075 , G01N27/4163
摘要： An SCU as a control device for the gas sensor (first and second NOx sensors) includes an applied voltage switching unit for switching an applied voltage of a pump cell when a deterioration detecting function is performed, and a deterioration rate calculation unit for calculating a deterioration rate of a sensor cell based on a slope during a transient change in an output of the sensor cell according to a switching of the applied voltage by the applied voltage switching unit.
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公开(公告)号：US20160209358A1
公开(公告)日：2016-07-21
申请号：US14914370
申请日：2014-08-29
申请人： DENSO CORPORATION
发明人： Yuusuke TOUDOU , Takehito KIMATA , Toru KATAFUCHI
IPC分类号： G01N27/417 , G01N27/407 , G01N27/419
CPC分类号： G01N27/4175 , G01N27/407 , G01N27/419
摘要： A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.
摘要翻译： 提供了一种气体浓度测量装置，其用于以更高的精度计算给定气体组分的浓度。 气体浓度测量装置1包括气体传感器10和计算部分11.气体传感器10配备有泵浦单元3，监视单元4和传感器单元5.计算部11减去监视单元电流 Im是从传感器单元电流Is流过监测单元4的电流，即流过传感器单元5的电流，以计算气体g中的给定气体成分的浓度。 当计算给定气体成分的浓度时，计算部分11进行校正操作，以使监测单元电流Im的值接近作为传感器单元电流Is的分量的氧相关电流Iso的值 从氧气的浓度。
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公开(公告)号：US20180031518A1
公开(公告)日：2018-02-01
申请号：US15550469
申请日：2016-02-12
申请人： DENSO CORPORATION
IPC分类号： G01N27/416 , G01N27/41 , G01N27/409 , G01N27/417 , G01N27/406 , G01N27/419
CPC分类号： G01N27/416 , G01M15/104 , G01M15/106 , G01N27/4067 , G01N27/409 , G01N27/41 , G01N27/4175 , G01N27/419 , G01N33/0016
摘要： A gas sensor is equipped with a solid electrolyte body, a pump electrode, a sensor electrode, and a heater. In the gas sensor, a region of the whole of a front end portion of a heater base in which a heating element is disposed is broken down into three regions: an intermediate region defined between a front end and a base end of the sensor electrode, a front end region located closer to a front end side than the intermediate region is, and a base end region located closer to a base end side than the intermediate region is. A resistance value per unit area of a heating element lying in the base end region and a resistance value per unit area of the heating element lying in the front end region is selected to be higher than that of the heating element lying in the intermediate region, thereby keeping the temperature of a region around the sensor electrode at a desired level even when the temperature of gas changes.
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公开(公告)号：US20170219516A1
公开(公告)日：2017-08-03
申请号：US15515262
申请日：2015-10-01
申请人： DENSO CORPORATION
IPC分类号： G01N27/407 , G01N27/406 , G01N27/41
CPC分类号： G01N27/4074 , G01N27/4067 , G01N27/4075 , G01N27/41 , G01N27/419
摘要： A gas concentration detection apparatus is provided with a measuring gas chamber, a solid electrolyte body, a pump cell, a sensor cell, a pump cell controller and a sensor cell detection section. The pump cell controller applies an elimination voltage to the pump cell at a start-up point, before a gas concentration is detected. The water in the measuring gas chamber is decomposed and hydrogen is generated by application of the elimination voltage. Oxygen occluded in a sensor electrode of the sensor cell is removed by the hydrogen.
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公开(公告)号：US20170138284A1
公开(公告)日：2017-05-18
申请号：US15335121
申请日：2016-10-26
发明人： Tatsuya UCHIMOTO , Ken OGAWA , Hiroshi AMAIKE , Shinichi OKUNISHI , Takehito KIMATA , Takao MISHIMA
CPC分类号： F02D41/0235 , B01D53/9431 , B01D53/9445 , B01D53/9495 , B01D2255/91 , B01D2258/012 , F01N3/0814 , F01N3/0842 , F01N3/0885 , F01N3/101 , F01N3/36 , F01N11/00 , F01N2550/03 , F01N2560/026 , F01N2570/14 , F01N2610/03 , F01N2900/0404 , F01N2900/0416 , F01N2900/0422 , F01N2900/1402 , F02D41/0275 , F02D41/1463 , F02D41/1475 , F02D41/26 , Y02A50/2344 , Y02T10/22 , Y02T10/47
摘要： An exhaust gas purifying apparatus for an internal combustion engine, in which a NOx absorbing catalyst and a NOx concentration sensor for detecting a NOx concentration in exhaust gases of the engine, are provided in an exhaust passage of the engine. A rich spike for temporarily enriching the air-fuel ratio is performed, and an execution timing of the rich spike is determined based on a detected output from the NOx concentration sensor. Performing the rich spike is determined to be unnecessary during a reducing state period from the time the rich spike ends to the time a preset time period has elapsed, and is also determined to be unnecessary when a change tendency of the detected output is determined to be an output decreasing state where the detected output is decreasing. The execution timing of the rich spike is determined using the detected output when the change tendency is determined to be an output staying/increasing state where the detected output is staying at a constant value or increasing after the end timing of the reducing state period.
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