公开(公告)号：US20150114102A1

公开(公告)日：2015-04-30

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: G01N33/00 ,  B05D1/36 ,  B05D3/02 ,  G01M15/10

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.

Abstract translation: 空气/燃料比传感器中的气体传感器元件包括元件体和具有两层（第一层和第二层）的保护层。 气体传感器元件具有在第一层和第二层之间的空间形式的至少一个分离部分。 气体传感器元件可以在至少一个分离部分中暂时积聚粘附到保护层的表面并渗透到保护层中的水。 因此，与保护层的厚度相同但不具有分离部的保护层相比，附着在保护层上的水不太可能到达元件体。 因此，由于水的附着引起的热冲击可能会导致元件体的端部受到限制。

公开(公告)号：US20140130572A1

公开(公告)日：2014-05-15

申请号：US13907230

申请日：2013-05-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shigehiro OTSUKA ,  Masaki ONKAWA ,  Toru IWANO ,  Satoshi TERAMOTO ,  Kuniharu TANAKA ,  Takeshi MITSUOKA

IPC: G01M15/10

CPC classification number: G01M15/102 ,  G01N27/4077

Abstract: A gas sensor element and a gas sensor incorporating the gas sensor element. The gas sensor element (100) includes a detection portion (150) including a solid electrolyte body (105) and a pair of electrodes (104) and (106) disposed on the solid electrolyte body; and a porous protection layer (20) covering the detection portion. The porous protection layer includes an inner porous layer (21) and an outer porous layer (23). The inner porous layer has a higher porosity than the outer porous layer. Further, the inner porous layer contains, as main components, ceramic particles (21a), and ceramic fiber filaments (21b), and the amount of the ceramic fiber filaments is 25 to 75 vol % based on the total amount of the ceramic particles and the ceramic fiber filaments taken as 100 vol %.

Abstract translation: 气体传感器元件和包含气体传感器元件的气体传感器。 气体传感器元件（100）包括：固体电解质体（105）和配置在固体电解质体上的一对电极（104）和（106）的检测部（150） 以及覆盖所述检测部的多孔保护层（20）。 多孔保护层包括内部多孔层（21）和外部多孔层（23）。 内部多孔层的孔隙率高于外层多孔层。 此外，内部多孔层含有陶瓷粒子（21a）和陶瓷纤维丝（21b）作为主要成分，陶瓷纤维丝的量相对于陶瓷粒子的总量为25〜75体积％， 陶瓷纤维长丝为100体积％。

公开(公告)号：US20150075254A1

公开(公告)日：2015-03-19

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: 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。

公开(公告)号：US20130104625A1

公开(公告)日：2013-05-02

申请号：US13665731

申请日：2012-10-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Sigehiro OTSUKA ,  Masaki ONKAWA ,  Toru IWANO ,  Satoshi TERAMOTO ,  Kuniharu TANAKA ,  Ken MITSUOKA ,  Takeshi Mitsuoka

IPC: G01N33/00

CPC classification number: G01N27/4077 ,  G01N33/0014 ,  G01N33/0037 ,  Y02A50/245

Abstract: A gas sensor element (100) includes a laminate of a detection element (300) and a heater (200), and a porous protection layer (20) covering a forward end portion thereof. The laminate has a measuring chamber (107c) into which a gas-to-be-measured is introduced via a diffusion resistor (115). The porous protection layer includes an inner porous layer (21), and an outer porous layer (23). The inner porous layer has a higher porosity than the outer porous layer and the diffusion resistor. As viewed in a plurality of 100 μm×100 μm regions a1 to a3 and b1 to b3 on sections of the inner porous layer and the diffusion resistor, respectively, a pore diameter greater than the greatest pore diameter CDIF in the regions of the diffusion resistor exists in each of the regions of the inner porous layer.

Abstract translation: 气体传感器元件（100）包括检测元件（300）和加热器（200）的层叠体，以及覆盖其前端部的多孔保护层（20）。 层压体具有经由扩散电阻器（115）引入待测气体的测量室（107c）。 多孔保护层包括内多孔层（21）和外多孔层（23）。 内部多孔层具有比外部多孔层和扩散电阻器更高的孔隙率。 从内部多孔层和扩散电阻的各部分的多个100mum×100mum区域a1〜a3，b1〜b3分别观察到，扩散电阻区域的孔径大于最大孔径CDIF 存在于内部多孔层的每个区域中。

公开(公告)号：US20150114085A1

公开(公告)日：2015-04-30

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 ,  B05D1/36 ,  B05D3/02 ,  B05D1/18

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.

Abstract translation: 气体传感器元件具有比通过浸渍工艺形成的常规保护层更小的热容量的保护层。 气体传感器包括气体传感器元件。 气体传感器元件通过制造方法制造。 气体传感器元件包括形成在保护层和元件体之间的至少一个空间。 在保护层的厚度可能变小的位置处，该空间被定位在元件主体的前端的四个顶点中的至少一个顶点上。 因此，可以抑制元件主体的前端的顶点的破坏，否则这可能是由于水的附着引起的热冲击而产生的。 与常规保护层相比，气体传感器元件的保护层的厚度可以减小，因此可以减小热容量。