公开(公告)号：US20180217089A1

公开(公告)日：2018-08-02

申请号：US15886052

申请日：2018-02-01

Applicant: DENSO CORPORATION

Inventor： Yasutaka KAMIYA ,  Yoshihide SEGAWA ,  Hirokazu YAMADA

IPC: G01N27/407 ,  F01N13/00 ,  G01N33/00 ,  G01M15/10 ,  G01N27/406 ,  G01N27/41

CPC classification number: G01N27/4078 ,  F01N13/008 ,  F01N2560/025 ,  G01M15/104 ,  G01N27/4067 ,  G01N27/4071 ,  G01N27/409 ,  G01N27/41 ,  G01N33/0037 ,  Y02A50/245

Abstract: A gas sensor is provided with a sensor element having a detecting portion; an insulator supporting the sensor element in a state where the detecting portion is protruded therefrom, the sensor element being inserted through the insulator; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover.An inner flange portion of the inner cover and an outer flange portion of the outer cover are supported between the insulator and the housing. A protrusion is formed on a corner portion facing the insulator, the protrusion contacting with the insulator. An end face of the outer flange portion is positioned radially closer to an outer side with respect to a radial direction, than a position of an end face of the inner flange portion.

公开(公告)号：US20180217090A1

公开(公告)日：2018-08-02

申请号：US15886063

申请日：2018-02-01

Applicant: DENSO CORPORATION

Inventor： Yasutaka KAMIYA ,  Yoshihide SEGAWA ,  Hirokazu YAMADA

IPC: G01N27/407 ,  F01N13/00 ,  G01M15/10 ,  G01N33/00 ,  G01N27/406 ,  G01N27/41

CPC classification number: G01N27/4078 ,  F01N13/008 ,  F01N2560/02 ,  F01N2560/025 ,  G01M15/104 ,  G01N27/4067 ,  G01N27/4071 ,  G01N27/41 ,  G01N33/0037 ,  Y02A50/245

Abstract: A gas sensor includes a sensor element having a detecting portion; an insulator supporting the sensor element inserted therethrough; a housing supporting the insulator; an inner cover covering the detecting portion; and an outer cover covering the inner cover.An inner flange portion of the inner cover and the outer flange portion of the outer cover are supported between the insulator and the housing. An end face of the inner flange portion is positioned towards outer side R1 with respect to the radial direction R than the position of an end face of the outer flange portion. A corner portion between the end face and a surface in the outer flange portion protrudes into a surface of the inner flange portion.

公开(公告)号：US20180313781A1

公开(公告)日：2018-11-01

申请号：US15766485

申请日：2016-09-28

Applicant: DENSO CORPORATION

Inventor： Yoshihide SEGAWA ,  Junta ZUSHI

IPC: G01N27/41 ,  G01N27/407

CPC classification number: G01N27/4073

Abstract: A gas sensor is provided which has improved responsiveness and is capable of improving accuracy in measurement of an imbalance between cylinders. The gas sensor includes a solid electrolyte having oxygen ion conductivity, a measurement electrode mounted on one principal surface of the solid electrolyte and is exposed to measurement gas, and a reference electrode mounted on the other principal surface of the solid electrolyte and exposed to reference gas A. Interface capacitance between crystal particles constituting the solid electrolyte is not more than 150 μF. Interface resistance between the crystal particles constituting the solid electrolyte and each of the measurement electrode and the reference electrode is not more than 80 Ω. The measurement electrode has a film thickness t1 of 2 to 8 μm.