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    Wetting test apparatus and method for gas sensor
    2.
    发明授权
    Wetting test apparatus and method for gas sensor 有权

    公开(公告)号：US11061007B2

    公开(公告)日：2021-07-13

    申请号：US16297985

    申请日：2019-03-11

    Applicant: NGK INSULATORS, LTD.

    Inventor： Jumpei Tanaka ,  Tomoya Seimori

    IPC: G01N33/00 ,  G01N13/00

    Abstract: A wetting test apparatus for a gas sensor includes: a pipe having a flow path therein; a blower for allowing a gas to flow through the flow path; a water supplier for supplying moisture to the flow path; at least one gas sensor for detecting at least one component of the gas flowing through the flow path; and a pressure variation generator for generating variations in a pressure of the gas flowing through the flow path by changing an effective cross-sectional area of the flow path.

    Apparatus and method for evaluating response time of gas sensor
    3.
    发明授权
    Apparatus and method for evaluating response time of gas sensor 有权

    公开(公告)号：US11016069B2

    公开(公告)日：2021-05-25

    申请号：US16351556

    申请日：2019-03-13

    Applicant: NGK INSULATORS, LTD.

    Inventor： Tomoya Seimori

    IPC: G01N33/00

    Abstract: An apparatus for evaluating a response time of gas sensors includes: a pipe; a first gas supplier for supplying a first gas to the pipe; a second gas adding machine for adding a second gas to the first gas in the pipe; and gas sensors for detecting components in a mixed gas of the first gas and the second gas, each of the gas sensors being attached to the pipe on a downstream side of an addition position of the second gas in a flow direction of the first gas. The second gas adding machine includes: a supply source of the second gas; a connecting pipe for connecting the supply source to the pipe; and a connecting pipe on-off valve for opening and closing the connecting pipe.

    Sensor element
    5.
    发明授权
    Sensor element 有权

    公开(公告)号：US11385197B2

    公开(公告)日：2022-07-12

    申请号：US16551765

    申请日：2019-08-27

    Applicant: NGK INSULATORS, LTD.

    Inventor： Yusuke Watanabe ,  Mika Kai ,  Tomoya Seimori ,  Takashi Hino

    IPC: G01N27/407 ,  F02D41/14 ,  G01N27/419 ,  G01N27/409

    Abstract: A sensor element includes: an element base including: a ceramic body made of an oxygen-ion conductive solid electrolyte, and having a gas inlet at one end portion thereof; at least one internal chamber located inside the ceramic body, and communicating with the gas inlet under predetermined diffusion resistance; an electrochemical pump cell including an electrode located on an outer surface of the ceramic body, an electrode facing the chamber, and a solid electrolyte located therebetween; and a heater buried in the ceramic body, and an leading-end protective layer being porous, and covering a leading end surface and four side surfaces in a predetermined range of the element base on the one end portion. The leading-end protective layer has an extension extending into the gas inlet, and fixed to an inner wall surface of the ceramic body demarcating the gas inlet.

    Gas sensor
    8.
    发明授权
    Gas sensor 有权

    公开(公告)号：US10048097B2

    公开(公告)日：2018-08-14

    申请号：US14955369

    申请日：2015-12-01

    Applicant: NGK INSULATORS, LTD.

    Inventor： Tomoya Seimori ,  Mika Murakami ,  Kengo Takeuchi

    IPC: G01D11/24 ,  G01N27/407 ,  G01N33/00

    Abstract: A gas sensor includes a sensor element that includes a gas inlet through which a measurement target gas is introduced into the sensor element and a protective cover that contains a substance having a capability of decomposing ammonia. The protective cover has a gas-contact surface area within a range of 450 mm2 to 1145 mm2, the gas-contact surface area being a sum of a surface area of a portion facing the inlet-side gas flow path and a surface area of a portion facing an in-element-chamber flow path of the sensor element chamber that is a shortest flow path for the measurement target gas from the element-chamber inlet to the gas inlet.

    Gas sensor
    9.
    发明授权
    Gas sensor 有权
    气体传感器

    公开(公告)号：US09213014B2

    公开(公告)日：2015-12-15

    申请号：US13676576

    申请日：2012-11-14

    Applicant: NGK Insulators, Ltd.

    Inventor： Takayuki Sekiya ,  Mika Murakami ,  Tomoya Seimori

    IPC: G01N27/407 ,  F01N11/00 ,  G01M15/10

    CPC classification number: G01N27/4077 ,  F01N11/00 ,  G01M15/10

    Abstract: In a gas sensor, a ratio A2/A1 defined by a ratio of an opening area A1 per first inner gas hole and an opening area A2 per second inner gas hole is set to higher than or equal to 0.9 and lower than or equal to 3.8 and, more preferably, to higher than or equal to 1.5 and lower than or equal to 1.9. Accordingly, adhesion of water to a sensor element can be sufficiently prevented. In addition, a ratio B2/B1 defined by a ratio of a total opening area B1 of the first inner gas holes to a total opening area B2 of the second inner gas holes is set to higher than or equal to 0.85 and, more preferably, higher than or equal to 1.5. Accordingly, adhesion of water to the sensor element can be more reliably, effectively prevented.

    Abstract translation: 在气体传感器中，由第一内部气体孔的开口面积A1与每秒的内部气体孔的开口面积A2的比率决定的比率A2 / A1被设定为高于或等于0.9且小于或等于3.8 更优选高于或等于1.5且小于或等于1.9。 因此，可以充分地防止水对传感器元件的附着。 此外，由第一内部气体孔的总开口面积B1与第二内部气体孔的总开口面积B2的比率限定的比率B2 / B1被设定为高于或等于0.85，更优选地， 高于或等于1.5。 因此，可以更可靠地有效地防止水对传感器元件的附着。

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