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公开(公告)号：US20220018273A1
公开(公告)日：2022-01-20
申请号：US17487254
申请日：2021-09-28
Applicant: DENSO CORPORATION
Inventor： Kazuhiko KOIKE , Keisuke MIZUTANI , Kana ASAOKU
Abstract: An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ1 and a smallest diameter Φ2 satisfy relationships Φ1≥50, 100×Φ2/Φ1≤20.
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公开(公告)号：US20180364193A1
公开(公告)日：2018-12-20
申请号：US16061790
申请日：2016-12-07
Applicant: DENSO CORPORATION
Inventor： Keigo MIZUTANI , Keisuke MIZUTANI , Mitsunobu NAKATO , Takashi ARAKI
IPC: G01N27/407 , G01N27/409 , G01N27/41 , G01N27/419 , G01N27/416 , G01N27/406
Abstract: A gas sensor includes a pump cell unit that regulates the oxygen concentration of a measured gas using a pump electrode, a monitor cell unit that detects the residual oxygen concentration of the measured gas using a monitor electrode, and a sensor cell unit that detects the concentration of a specific gas component in the measured gas using a sensor electrode. Between a pump electrode lead part and the sensor electrode, there is arranged the monitor electrode. Between an upstream portion of the pump electrode lead part and a monitor electrode lead part, there is provided an interval w1 of 0.5 mm or more.
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公开(公告)号：US20190025248A1
公开(公告)日：2019-01-24
申请号：US16070601
申请日：2016-11-03
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Keigo MIZUTANI , Keisuke MIZUTANI , Mitsunobu NAKATO , Takashi ARAKI
IPC: G01N27/419 , G01N33/00 , G01N27/407 , G01N27/409 , G01N27/41
CPC classification number: G01N27/419 , G01N27/4072 , G01N27/409 , G01N27/41 , G01N33/0036
Abstract: A gas sensor which can improve an accuracy in detecting a specific gas component by properly correcting for the influence of residual oxygen is provided. The gas sensor includes a solid electrolyte plate, a measured gas chamber into which a measured gas flows, a pump cell which adjusts an oxygen concentration of the measured gas using a pump electrode, a monitor cell which detects a residual oxygen concentration of the measured gas using a monitor electrode, and a sensor cell which detects a specific gas component concentration of the measured gas using a sensor electrode. The maximum thickness of the sensor electrode is greater than the maximum thickness of the monitor electrode, and the difference between the maximum thickness of the sensor electrode and the maximum thickness of the monitor electrode is between 4 μm and 30 μm, inclusive.
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Patent Agency Ranking
公开(公告)号：US20220054978A1
公开(公告)日：2022-02-24
申请号：US17451825
申请日：2021-10-22
Applicant: DENSO CORPORATION
Inventor： Kazuhiko KOIKE , Keisuke MIZUTANI , Kana ASAOKU
Abstract: An exhaust gas purification filter comprises a base material part, a catalyst layer, and sealing parts. The base material part comprises porous partition walls. The catalyst layer is supported on pore walls of the partition walls. The partition walls supporting the catalyst layer comprise 10% or less of pores having a pore diameter of 50 μm or more. In the pore diameter distribution in the partition walls supporting the catalyst layer, the pore diameter D50 at which the cumulative pore volume becomes 50% is 10 μm or more. The pore diameter D50, and the pore diameter D10 at which the cumulative pore volume becomes 10%, satisfy the relationship of the following Expression 1. (D50−D10)/D50≤0.9 Expression 1
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公开(公告)号：US20190383768A1
公开(公告)日：2019-12-19
申请号：US16098543
申请日：2017-04-19
Applicant: DENSO CORPORATION
Inventor： Keisuke MIZUTANI , Keigo MIZUTANI , Mitsunobu NAKATO , Takashi ARAKI
IPC: G01N27/419
Abstract: Provided is a gas sensor improving accuracy of detection of specific gas in measurement gas, while maintaining high responsiveness in detection of the specific gas. A sensor element of a gas sensor includes a first solid electrolyte and second solid electrolyte having oxygen ionic conductivity, a measurement gas chamber into which measurement gas is introduced, a first reference gas chamber and second reference gas chamber into which reference gas is introduced, a first pump cell, a second pump cell, a sensor cell, and a heater. The sensor cell detects a specific gas component in the measurement gas having an oxygen concentration adjusted by the pump cells. The heater is located opposite to a second principal surface of the second solid electrolyte on which the sensor cell is formed.
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公开(公告)号：US20200306743A1
公开(公告)日：2020-10-01
申请号：US16831947
申请日：2020-03-27
Applicant: DENSO CORPORATION
Inventor： Kazuhiko KOIKE , Keisuke MIZUTANI , Hiroaki KAYAMA
Abstract: A honeycomb structure body has a skin part of a cylindrical shape and a honeycomb structural part formed with the skin part together in a monolithic body. The skin part and the honeycomb structural part have partition walls of a porous structure. The cells have first cells arranged adjacent to the skin part and second cells arranged adjacent to the first cells. The skin part, the first cells and the second cells form an outer peripheral section. A central section is arranged inside the outer peripheral section. The honeycomb structure body satisfies a relationship in which a thermal expansion coefficient of the outer peripheral section is greater than a thermal expansion coefficient of the central section.
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公开(公告)号：US20190227027A1
公开(公告)日：2019-07-25
申请号：US16313551
申请日：2017-05-15
Applicant: DENSO CORPORATION
Inventor： Keisuke MIZUTANI , Keigo MIZUTANI , Shota HAGINO , Mitsunobu NAKATO , Takashi ARAKI
IPC: G01N27/419 , G01N27/407 , G01N27/41 , F01N13/00
Abstract: The present invention provides a gas sensor capable of suppressing a variation of a sensor output by a sensor cell to be small. A sensor element of a gas sensor comprises a first solid electrolyte body and a second solid electrolyte body having oxygen ion conductivity, a measured gas chamber into which the measured gas is introduced, a first reference gas chamber and a second reference gas chamber into which reference gas is introduced, a first pump cell, a second pump cell, a sensor cell, and a heater. A value obtained by dividing a first average cross-sectional area of the first reference gas chamber by the first length is larger than the value obtained by dividing the second average cross-sectional area of the second reference gas chamber by the second length.
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公开(公告)号：US20170146482A1
公开(公告)日：2017-05-25
申请号：US15323221
申请日：2015-06-29
Applicant: DENSO CORPORATION
Inventor： Keisuke MIZUTANI , Nobuyuki TSUJI
IPC: G01N27/407 , G01N27/409
CPC classification number: G01N27/4077 , G01N27/409
Abstract: A gas sensor includes a sensor element having a measuring electrode and a reference electrode, a housing accommodating the sensor element, and an element cover including an inner cover having an inner side wall section and an inner bottom wall section, and an outer cover having an outer side wall section and an outer bottom wall section. Inner side surface holes and outer side surface holes are formed in the inner side wall section and the outer side wall section. Inner bottom surface holes and outer bottom surface holes are formed in the inner bottom wall section and the outer bottom wall section. The ratio of the total surface area of the outer side surface holes with respect to the total surface area of the inner bottom surface holes is 8 to 47. The total surface area of the inner side surface holes is 2 to 8 mm2.
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