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.

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。

公开(公告)号：US09121819B2

公开(公告)日：2015-09-01

申请号：US13860038

申请日：2013-04-10

Applicant: NGK Insulators, Ltd.

Inventor： Hiroki Fujita ,  Sumiko Horisaka ,  Mika Murakami ,  Takashi Ito

IPC: G01N27/41 ,  G01N27/419 ,  G01N27/417 ,  G01N27/407

CPC classification number: G01N27/41 ,  G01N27/4071 ,  G01N27/4072 ,  G01N27/4074 ,  G01N27/417 ,  G01N27/419

Abstract: A gas sensor including an internal space, a first electrode, a second electrode, a pumping cell, a third electrode, a fourth electrode, a measuring cell, and a porous diffusion layer. The first and third electrodes, and the second and fourth electrodes are formed inside and outside the internal space, respectively. The pumping cell includes the first and second electrodes, and the measuring cell includes the third and fourth electrodes. The pumping cell pumps oxygen from the internal space when a predetermined voltage is applied between the first and second electrodes. The third electrode reduces an oxide gas component in a predetermined gas component to which a predetermined diffusion resistance has been applied by the porous diffusion layer. The measuring cell measures current flow between the third and fourth electrodes when a voltage corresponding to the degree of reduction in the third electrode is applied between the third and fourth electrodes.

Abstract translation: 一种气体传感器，包括内部空间，第一电极，第二电极，泵浦单元，第三电极，第四电极，测量单元和多孔扩散层。 第一和第三电极以及第二和第四电极分别形成在内部空间内部和外部。 泵浦单元包括第一和第二电极，测量单元包括第三和第四电极。 当在第一和第二电极之间施加预定电压时，泵送单元从内部空间泵送氧气。 第三电极通过多孔扩散层减少预定的扩散电阻施加到预定的气体成分中的氧化物气体成分。 当在第三和第四电极之间施加与第三电极的减小程度相对应的电压时，测量单元测量第三和第四电极之间的电流。

公开(公告)号：US10215725B2

公开(公告)日：2019-02-26

申请号：US14672793

申请日：2015-03-30

Applicant: NGK Insulators, Ltd.

Inventor： Takayuki Sekiya ,  Mika Murakami ,  Naoya Saito

IPC: G01N27/407

Abstract: In a sensor element, a fourth diffusion rate-controlling portion includes a diffusion rate-controlling portion. The diffusion rate-controlling portion is formed between one or more and three or less surfaces, e.g., an upper surface, of upper, lower, left and right inner peripheral surfaces of a measurement-object gas flowing portion and a partition wall. A measurement electrode is formed on one, e.g., a lower surface, of upper, lower, left and right inner peripheral surfaces of a third inner cavity, the one surface being different in orientation from the Csurface along which the diffusion rate-controlling portion is formed. The diffusion rate-controlling portion and the measurement electrode may be formed on surfaces opposite to each other. A distance L between the measurement electrode and the diffusion rate-controlling portion may be 0.1 mm or more.

公开(公告)号：US10852270B2

公开(公告)日：2020-12-01

申请号：US15074311

申请日：2016-03-18

Applicant: NGK INSULATORS, LTD.

Inventor： Takashi Hino ,  Mika Murakami ,  Koichi Masuda ,  Hironori Sakakibara

IPC: G01N27/407 ,  G01N27/41 ,  G01N33/00

Abstract: A sensor element includes an element body having an elongate rectangular parallelepiped shape and including solid electrolyte layers with oxygen ion conductivity, an outer pump electrode disposed on a first surface of the element body, and a protective layer covering at least a part of the first surface of the element body and including one or more spaces (an upper space) that are present apart from the first surface in a direction perpendicular to the first surface.

公开(公告)号：US10267762B2

公开(公告)日：2019-04-23

申请号：US15074356

申请日：2016-03-18

Applicant: NGK INSULATORS, LTD.

Inventor： Takashi Hino ,  Mika Murakami ,  Koichi Masuda ,  Hironori Sakakibara

IPC: G01N27/409 ,  G01N27/407 ,  G01N27/41 ,  G01N33/00

Abstract: A sensor element includes an element body having an elongate rectangular parallelepiped shape and including solid electrolyte layers with oxygen ion conductivity, an outer pump electrode disposed on a first surface of the element body, and a protective layer covering at least a part of a second surface of the element body on a side opposite to the first surface and including one or more spaces (a lower space) that are present apart from the second surface in a direction perpendicular to the second surface.

公开(公告)号：US09915637B2

公开(公告)日：2018-03-13

申请号：US14865471

申请日：2015-09-25

Applicant: NGK INSULATORS, LTD.

Inventor： Takayuki Sekiya ,  Mika Murakami ,  Shingo Sokawa ,  Yosuke Okabe

IPC: G01N7/00 ,  G01N33/00 ,  G01N27/407 ,  G01M15/10

CPC classification number: G01N33/0036 ,  G01M15/102 ,  G01M15/104 ,  G01N27/4077 ,  G01N33/0037 ,  Y02A50/245

Abstract: First inner gas holes 134a and first outer gas holes 144a of a gas sensor are formed so that the following conditions are satisfied: a first-inner-hole count Nin≧3, 0

公开(公告)号：US09804139B2

公开(公告)日：2017-10-31

申请号：US14732949

申请日：2015-06-08

Applicant: NGK Insulators, Ltd.

Inventor： Mika Murakami ,  Sumiko Horisaka ,  Hiroki Fujita

IPC: G01N33/00 ,  G01N27/407 ,  G01N27/419

CPC classification number: G01N33/0039 ,  G01N27/4071 ,  G01N27/4077 ,  G01N27/419 ,  Y02A50/247

Abstract: A sensor element 101 of a gas sensor 100 includes a blocking portion 65 including an outer blocking layer 67 that is formed to cover, in an upper surface of a multilayer body, at least a part of an upper closest region 6a where an outer pump electrode 23 is not disposed and a distance up to a third inner cavity 61 is minimal. The outer blocking layer 67 does not have conductivity for one or more among various types of substances containing oxygen. The outer blocking layer 67 is disposed between a lead line 93 for the outer pump electrode and the upper surface of the multilayer body to provide insulation therebetween, and is disposed between an upper connector pad 91 and the upper surface of the multilayer body to provide insulation therebetween. A porous protective layer 24 covers the outer pump electrode 23.

公开(公告)号：US09952072B2

公开(公告)日：2018-04-24

申请号：US14948437

申请日：2015-11-23

Applicant: NGK INSULATORS, LTD.

Inventor： Mika Murakami ,  Takayuki Sekiya ,  Tomoya Seimori

IPC: G01N7/00 ,  G01D11/24 ,  G01N27/407

CPC classification number: G01D11/245 ,  G01N27/4077

Abstract: The gas sensor 100 has a gas flow channel 127 formed therein by an inner protection cover 130. The gas flow channel 127 is formed in the pathway of measured gas from a first outer gas hole 144a formed in an outer protection cover 140 that covers the tip end of a sensor element 110 to a gas inlet port 111 of the sensor element 110. The gas flow channel 127 extends from the rear end side to the tip end side of the sensor element 110 and is open to the sensor element chamber 124 having the gas inlet port 111 disposed therein.

公开(公告)号：US09110012B2

公开(公告)日：2015-08-18

申请号：US14083748

申请日：2013-11-19

Applicant: NGK Insulators, Ltd.

Inventor： Sumiko Horisaka ,  Hiroki Fujita ,  Mika Murakami ,  Takashi Ito

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

CPC classification number: G01N27/409 ,  G01N27/4071 ,  G01N27/4072 ,  G01N27/4074 ,  G01N27/417 ,  G01N27/419

Abstract: A gas sensor including a sensor element constituted by an oxygen-ion conductive solid electrolyte as a main component and detecting a predetermined gas component in a measurement gas includes: an external communication part having an opening opened to the outside, and introducing the measurement gas from the outside under a predetermined diffusion resistance; an internal space communicating with the external communication part; a first electrode formed on a surface of the internal space; a second electrode formed in a space different from the internal space; and a pumping cell operable to pump out oxygen existing in the internal space when a predetermined voltage is applied between the first electrode and the second electrode. The thickness of the external communication part is 50% or more and 100% or less of the thickness of the internal space.

Abstract translation: 一种气体传感器，包括由氧离子传导性固体电解质作为主要成分构成的检测测定气体中的规定气体成分的传感器元件，具有：外部连通部，具有向外部开放的开口，将测定气体从 外部在预定的扩散阻力下; 与外部通信部分通信的内部空间; 形成在所述内部空间的表面上的第一电极; 形成在与所述内部空间不同的空间中的第二电极; 以及当在第一电极和第二电极之间施加预定电压时，可操作地泵送存在于内部空间中的氧气的泵送单元。 外部连通部的厚度为内部空间的厚度的50％以上且100％以下。