公开(公告)号：US20130074582A1

公开(公告)日：2013-03-28

申请号：US13629516

申请日：2012-09-27

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shun Sakuma ,  Shigeki Mori ,  Masaki Mizutani ,  Yuichi Yamada ,  Shohei Yoshiyasu ,  Hirotaka Tsukamatsu ,  Makoto Shimoide

IPC: G01N37/00

CPC classification number: G01N27/4077 ,  G01N27/4071 ,  G01N33/0037 ,  G01N33/004 ,  Y02A50/245

Abstract: A gas sensor including a plate-shaped detecting element is disclosed, wherein the detecting element has a pair of principle surfaces and a pair of side surfaces adjacent to the pair of principle surfaces, in a radical direction thereof, wherein a first chamfered portion is provided between at least one first principal surface of the pair of principal surfaces and the rear end surface of the detecting element, and wherein the angle between a first axis ridgeline portion formed by the first principal surface and a first side surface that is one of the pair of side surfaces and extending in the direction of the axis, and a first width ridgeline formed by the first principal surface and the first chamfered portion and extending in a width direction is larger than 90°.

Abstract translation: 本发明公开了一种具有板状检测元件的气体传感器，其特征在于，所述检测元件具有一对原理面和与所述一对原理面邻接的一对侧面，其沿自由度方向设置有第一倒角部 在所述一对主表面的至少一个第一主表面和所述检测元件的后端表面之间，并且其中由所述第一主表面形成的第一轴线脊线部分和所述第一主表面之一之间的角度 并且沿所述轴线方向延伸，并且由所述第一主表面和所述第一倒角部分形成并在宽度方向上延伸的第一宽度脊线大于90°。

公开(公告)号：US10481122B2

公开(公告)日：2019-11-19

申请号：US15498074

申请日：2017-04-26

Applicant: NGK Spark Plug Co., LTD.

Inventor： Ai Igarashi ,  Kouji Toida ,  Shun Sakuma

IPC: G01N27/407 ,  G01N27/406

Abstract: A gas sensor element comprises a solid electrolyte layer; a detection electrode provided on one surface of the solid electrolyte layer; a reference electrode provided on another surface of the solid electrolyte layer; a first layer provided on a side where the other surface of the solid electrolyte layer is present, and having a reference gas flow path; and a heater layer provided on a side opposite to a side where the solid electrolyte layer is provided. In the gas sensor element, an introduction flow path is formed as a flow path for guiding the reference gas from outer surfaces of the gas sensor element to the reference gas flow path. The introduction flow path has an opening provided at an outer surface that is perpendicular to a stacking direction of the gas sensor element and is provided on a side opposite to the heater layer.

公开(公告)号：US09694387B2

公开(公告)日：2017-07-04

申请号：US14525794

申请日：2014-10-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masaki Onkawa ,  Shun Sakuma ,  Toru Iwano ,  Tatsuhiko Muraoka ,  Shigehiro Ohtsuka ,  Masaki Mizutani

IPC: B05D3/02 ,  G01N27/407

CPC classification number: B05D3/0254 ,  G01N27/4077 ,  G01N27/4078

Abstract: A gas sensor element in an air/fuel ratio sensor includes an element body and a protection layer having two layers (a first layer and a second layer). The gas sensor element has at least one separation portion in the form of a space between the first layer and the second layer. The gas sensor element can temporarily accumulate, in the at least one separation portion, water which adheres to the surface of the protection layer and penetrates into the protection layer. Thus, as compared with a protection layer which is identical in thickness to the protection layer, but does not have separation portions, water adhering to the protection layer is less likely to reach the element body. Therefore, there can be restrained breakage of an end of the element body which could otherwise result from thermal shock stemming from adhesion of water.

公开(公告)号：US10883959B2

公开(公告)日：2021-01-05

申请号：US16006222

申请日：2018-06-12

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Ai Igarashi ,  Kouji Toida ,  Shun Sakuma

IPC: G01N27/407

Abstract: A plate-shaped sensor element (10) including at least a first layer (150), a second layer (130), and a third layer (140) being stacked in a stacking direction. The first layer and the third layer are mainly formed of ceramic. The second layer is disposed between the first layer and the third layer in the stacking direction. The second layer has an air introduction hole (131) opened at an end surface. In a cross-section perpendicular to a direction of an axis O, a length L1 of a shortest line segment P1 connecting an upper end surface (10a, 10b) of the sensor element and the centroid G1 of the sensor element and a length L2 of a shortest line segment P2 connecting the upper end surface of the sensor element and the centroid G2 of the air introduction hole, satisfy a relationship of |L2−L1|/L1≤0.05.

公开(公告)号：US10830730B2

公开(公告)日：2020-11-10

申请号：US16006222

申请日：2018-06-12

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Ai Igarashi ,  Kouji Toida ,  Shun Sakuma

IPC: G01N27/407

Abstract: A plate-shaped sensor element (10) including at least a first layer (150), a second layer (130), and a third layer (140) being stacked in a stacking direction. The first layer and the third layer are mainly formed of ceramic. The second layer is disposed between the first layer and the third layer in the stacking direction. The second layer has an air introduction hole (131) opened at an end surface. In a cross-section perpendicular to a direction of an axis O, a length L1 of a shortest line segment P1 connecting an upper end surface (10a, 10b) of the sensor element and the centroid G1 of the sensor element and a length L2 of a shortest line segment P2 connecting the upper end surface of the sensor element and the centroid G2 of the air introduction hole, satisfy a relationship of |L2−L1|/L1≤0.05.

公开(公告)号：US09176093B2

公开(公告)日：2015-11-03

申请号：US13782336

申请日：2013-03-01

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shun Sakuma ,  Masaki Mizutani ,  Makoto Shimoide

IPC: G01N27/407

CPC classification number: G01N27/4071

Abstract: A gas sensor element having a chamfered portion. The chamfered portion has a leading end chamfered portion formed in a leading end portion of the gas sensor element, a rear end chamfered portion formed in a rear end portion of the gas sensor element, and an intermediate chamfered portion linking the leading end chamfered portion and rear end chamfered portion. The chamfer angle of the rear end chamfered portion is formed so as to be larger than the chamfer angle of the leading end chamfered portion.

Abstract translation: 具有倒角部分的气体传感器元件。 倒角部具有形成在气体传感器元件的前端部的前端倒角部，形成在气体传感元件的后端部的后端倒角部和将前端倒角部和 后端倒角部。 后端倒角部的倒角形成为大于前端倒角部的倒角角度。

公开(公告)号：US09753020B2

公开(公告)日：2017-09-05

申请号：US14525949

申请日：2014-10-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Toru Iwano ,  Masaki Onkawa ,  Tatsuhiko Muraoka ,  Shun Sakuma ,  Shigehiro Ohtsuka ,  Masaki Mizutani

IPC: G01N33/00 ,  B05D1/18 ,  B05D1/36 ,  B05D3/02 ,  G01N27/409 ,  G01N27/407

CPC classification number: G01N33/0027 ,  B05D1/18 ,  B05D1/36 ,  B05D3/0254 ,  G01N27/407 ,  G01N27/4078 ,  G01N27/409

Abstract: A gas sensor element has a protection layer smaller in heat capacity than a conventional protection layer formed by a dipping process. A gas sensor includes the gas sensor element. The gas sensor element is manufactured by a method of manufacturing. The gas sensor element includes at least one space formed between a protection layer and an element body. The space is positioned over at least one of four vertexes of a forward end of the element body at a location at which the thickness of the protection layer is likely to become small. Therefore, it is possible to restrain breakage of the vertexes of the forward end of the element body which could otherwise result from thermal shock stemming from adhesion of water. The protection layer of the gas sensor element can be reduced in thickness and thus in heat capacity as compared with a conventional protection layer.

公开(公告)号：US09689834B2

公开(公告)日：2017-06-27

申请号：US13629516

申请日：2012-09-27

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shun Sakuma ,  Shigeki Mori ,  Masaki Mizutani ,  Yuichi Yamada ,  Shohei Yoshiyasu ,  Hirotaka Tsukamatsu ,  Makoto Shimoide

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

CPC classification number: G01N27/4077 ,  G01N27/4071 ,  G01N33/0037 ,  G01N33/004 ,  Y02A50/245

Abstract: A gas sensor including a plate-shaped detecting element is disclosed, wherein the detecting element has a pair of principle surfaces and a pair of side surfaces adjacent to the pair of principle surfaces, in a radical direction thereof, wherein a first chamfered portion is provided between at least one first principal surface of the pair of principal surfaces and the rear end surface of the detecting element, and wherein the angle between a first axis ridgeline portion formed by the first principal surface and a first side surface that is one of the pair of side surfaces and extending in the direction of the axis, and a first width ridgeline formed by the first principal surface and the first chamfered portion and extending in a width direction is larger than 90°.

公开(公告)号：US09476863B2

公开(公告)日：2016-10-25

申请号：US14485438

申请日：2014-09-12

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shun Sakuma ,  Masaki Onkawa ,  Toru Iwano ,  Tatsuhiko Muraoka ,  Shigehiro Ohtsuka ,  Masaki Mizutani

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

CPC classification number: G01N33/0036 ,  G01M15/104 ,  G01N27/4072 ,  G01N27/4077 ,  G01N33/006

Abstract: A gas sensor element comprises an elongated plate-like element including, at a forward end portion, a detecting section comprising a solid electrolyte body having an outer surface and a back surface, a detection electrode on the outer surface and a reference electrode on the back surface, and a porous layer covering the detection electrode. The coating layer includes a first protection layer entirely covering the detecting section, and a second protection layer circumferentially covering the first protection layer and extending at least from a forward end of the first protection layer to a position located rearward of the porous layer. The thickness of the first protection layer on the porous layer is larger than that of the first protection layer rearward of the porous layer. The thickness of the second protection layer rearward of the porous layer is larger than that of the second protection layer above the porous layer.

Abstract translation: 一种气体传感器元件包括细长的板状元件，其在前端部分包括检测部分，该检测部分包括具有外表面和后表面的固体电解质体，外表面上的检测电极和背面上的参考电极 表面和覆盖检测电极的多孔层。 涂层包括完全覆盖检测部分的第一保护层，以及周向覆盖第一保护层并且至少从第一保护层的前端延伸到位于多孔层后方的位置的第二保护层。 多孔层上的第一保护层的厚度大于多孔层的后方的第一保护层的厚度。 多孔层后方的第二保护层的厚度大于多孔层上方的第二保护层的厚度。