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：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.