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    Sensor element and gas sensor
    1.
    发明授权
    Sensor element and gas sensor 有权

    公开(公告)号：US11921078B2

    公开(公告)日：2024-03-05

    申请号：US17411081

    申请日：2021-08-25

    Applicant: NGK INSULATORS, LTD.

    Inventor： Tomoki Nagae ,  Yoshimasa Kondo ,  Yusuke Ogiso ,  Katsunao Uenishi ,  Atsushi Watanabe ,  Ayato Koizumi

    IPC: G01N27/407

    CPC classification number: G01N27/4074 ,  G01N27/4076 ,  G01N27/4077 ,  G01N27/4078

    Abstract: A sensor element includes an element body and a porous protective layer arranged to cover a part of a surface of the element body. The protective layer includes an inlet protective layer arranged to cover a gas inlet formed in the surface of the element body, and at least a part of a face included in the surface of the element body, the face on which the gas inlet is opens, and an arithmetic average roughness Rap of an inner peripheral surface of an internal space of the inlet protective layer satisfies at least one of conditions below: the arithmetic average roughness Rap is 8 μm or more, and the arithmetic average roughness Rap is higher than an arithmetic average roughness Rac of a bonding surface of the protective layer, the bonding surface at which the protective layer is bonded to the element body.

    Gas sensor
    2.
    发明授权
    Gas sensor 有权

    公开(公告)号：US11782016B2

    公开(公告)日：2023-10-10

    申请号：US15977204

    申请日：2018-05-11

    Applicant: DENSO CORPORATION

    Inventor： Junta Zushi ,  Makoto Ito

    IPC: G01N27/407

    CPC classification number: G01N27/4076 ,  G01N27/4071 ,  G01N27/4075 ,  G01N27/4077

    Abstract: A gas sensor which detects a concentration of a specific gas contained in a gas to be measured is provided with a gas sensor element. The gas sensor element has an ion conductive solid electrolyte body, a measuring gas electrode which is mounted on a surface of the solid electrolyte body, a reference gas electrode mounted on a surface of the solid electrolyte body, and a catalyst layer mounted on an outer-side relative to the measuring gas electrode-side. The catalyst layer contains a metal catalyst loaded onto a carrier. The metal catalyst is a Pt single substance, and has a specific surface area defined by the equation below of equal to or more than 0.01 to equal to or less than 23: Specific surface area=total surface area of metal catalyst which exists on an electrode unit surface area/actual surface area of electrode per electrode unit surface area.

    Sensor element and gas sensor
    3.
    发明授权
    Sensor element and gas sensor 有权

    公开(公告)号：US11774398B2

    公开(公告)日：2023-10-03

    申请号：US17192070

    申请日：2021-03-04

    Applicant: NGK INSULATORS, LTD.

    Inventor： Yusuke Watanabe ,  Takayuki Sekiya

    IPC: G01N27/407 ,  G01N27/409 ,  G01N27/417

    CPC classification number: G01N27/4071 ,  G01N27/409 ,  G01N27/4076 ,  G01N27/417

    Abstract: A sensor element for detecting a specific gas concentration in a measurement-object gas includes: an element body including an oxygen-ion-conductive solid electrolyte layer, and having inside a measurement-object gas flow portion that introduces and flows a measurement-object gas and a reference gas chamber used to store a reference gas that is a reference for detecting a specific gas concentration; a reference electrode disposed in the reference gas chamber; and an electrically conductive portion which includes a reference electrode terminal and a reference electrode lead portion that provides electrical continuity between the reference electrode terminal and the reference electrode. The reference gas chamber is provided inside the sensor element in an isolated form, and at least part of the electrically conductive portion is densely formed so as to block movement of oxygen between the reference gas chamber and the outside of the sensor element via the electrically conductive portion.

    Sensor material and gas sensor element and gas sensor derived therefrom
    7.
    发明授权
    Sensor material and gas sensor element and gas sensor derived therefrom 有权

    公开(公告)号：US09823216B2

    公开(公告)日：2017-11-21

    申请号：US14565896

    申请日：2014-12-10

    Applicant: DELPHI TECHNOLOGIES, INC.

    Inventor： Da Yu Wang ,  David M. Racine ,  Sheng Yao

    IPC: G01N27/407

    CPC classification number: G01N27/4075 ,  G01N27/4076

    Abstract: An NO2 sensor comprises a sensing electrode material that includes a compound consisting essentially of one or more elements selected from the group consisting of Mn, Co, and Fe; an element selected from the group consisting of Si and Ti; and oxygen. In an alternate embodiment, the sensing electrode material includes a compound consisting essentially of one or more elements selected from the group consisting of Mn, Co, and Fe; an element selected from the group consisting of Si and Ti; an element selected from the group consisting of Mg, Al, Li, Na, and K; and oxygen. Sensors made with these sensing electrode materials demonstrate good NO2 sensitivity and reduced sensitivity to cross-interference from NO and NH3.

    Control device for internal combustion engine
    9.
    发明授权
    Control device for internal combustion engine 有权
    内燃机控制装置

    公开(公告)号：US09400258B2

    公开(公告)日：2016-07-26

    申请号：US14652935

    申请日：2013-07-08

    Applicant: Keiichiro Aoki

    Inventor： Keiichiro Aoki

    IPC: G01N27/407 ,  F01N11/00 ,  F01N3/10 ,  F02D41/14

    CPC classification number: G01N27/4076 ,  F01N3/10 ,  F01N11/007 ,  F01N2430/06 ,  F01N2560/025 ,  F01N2900/0408 ,  F01N2900/1402 ,  F01N2900/1624 ,  F02D41/0295 ,  F02D41/123 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1456 ,  F02D41/1475 ,  F02D41/1476 ,  F02D2200/0814 ,  Y02T10/47

    Abstract: This control device for an internal combustion engine includes: an exhaust purification catalyst that is provided in an exhaust passage of the internal combustion engine; a downstream air-fuel ratio sensor that is provided downstream of the exhaust purification catalyst; and an air-fuel ratio control device that controls such that the air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The downstream air-fuel ratio sensor is configured such that the applied voltage thereof at which the output current becomes zero decreases as the exhaust air-fuel ratio increases. If the target air-fuel ratio is richer than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a higher voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. If the target air-fuel ratio is leaner than the reference air-fuel ratio, the voltage applied to the downstream air-fuel ratio sensor is set to a lower voltage than the voltage at which the output current becomes zero when the exhaust air-fuel ratio is the stoichiometric air-fuel ratio. A control device for an internal combustion engine using an air-fuel ratio sensor that can reliably detect when the absolute value of the exhaust air-fuel ratio reaches a prescribed air-fuel ratio richer than the stoichiometric air-fuel ratio is thus provided.

    Abstract translation: 该内燃机用控制装置具备：排气净化催化剂，其设置在内燃机的排气通路中; 设置在排气净化催化剂下游的下游空燃比传感器; 以及空气燃料比控制装置，其控制使流入所述排气净化催化剂的废气的空燃比达到目标空燃比。 下游空燃比传感器被配置为使得其输出电流为零的施加电压随着排气空燃比的增加而减小。 如果目标空燃比比参考空燃比更浓，那么施加到下游空燃比传感器的电压设定为比排气空燃比输出电流为零时的电压高 比是化学计量空燃比。 如果目标空燃比比参考空燃比更精细，那么施加到下游空燃比传感器的电压设定为比排气空燃比输出电流为零时的电压低的电压 比是化学计量空燃比。 因此，提供了一种使用空燃比传感器的内燃机的控制装置，该空燃比传感器能够可靠地检测当排气空燃比的绝对值达到比理论空燃比富于规定的空燃比时。

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