公开(公告)号：US20240418672A1

公开(公告)日：2024-12-19

申请号：US18816329

申请日：2024-08-27

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Takumi USHIKUBO

IPC: G01N27/407 ,  G01N27/406

Abstract: A sensor element includes a gas sensor that includes a solid electrolyte body, a heater, and a protective layer. The protective layer covers a detection tip end portion of the sensor element and has a porosity of equal to or greater than 25%. The protective layer includes a shielding side portion and a heater side portion. The shielding side portion is a planar portion on a side of the protective layer on which the solid electrolyte body is positioned in an opposing direction of the solid electrolyte body and the heater. The heater side portion is a planar portion on a side of the protective layer on which the heater is positioned in the opposing direction. A thickness of the shielding side portion is greater than a thickness of the heater side portion.

公开(公告)号：US20220113276A1

公开(公告)日：2022-04-14

申请号：US17557853

申请日：2021-12-21

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Satoshi SUZUKI ,  Takumi USHIKUBO

IPC: G01N27/406 ,  G01N27/409 ,  G01N27/407

Abstract: The sensor element of a gas sensor includes an element body, a surface protective layer provided at the outermost surface position of a tip portion of the element body, in the longitudinal direction of the element body, and an internal protective layer provided between the surface protective layer and the element body. The internal protective layer has a lower thermal conductivity and a higher average porosity than the surface protective layer, and is disposed between the surface protective layer and the element body. In the internal protective layer, a first protective layer portion of the internal protective layer is located on a side that faces the heater, and at least the base position is positioned closer in the longitudinal direction to the tip end of the element body than is the maximum temperature position on the element body.