公开(公告)号：US20190391109A1

公开(公告)日：2019-12-26

申请号：US16451285

申请日：2019-06-25

Applicant: DENSO CORPORATION

Inventor： Shota HAGINO ,  Masatoshi IKEDA ,  Makoto ITO ,  Zhenzhou SU ,  Hao WU ,  Takashi HIRAYAMA ,  Daisuke KAWAI ,  Satoshi NAKAMURA

IPC: G01N27/407 ,  G01N27/409

Abstract: A gas sensor is equipped with a sensor device made of a stack of a solid electrolyte body, a sensor electrode, a reference electrode, a first insulator, a second insulator, a gas chamber, a reference gas duct, a heater, and a heat transfer member. The heater has a heating element at least partially overlapping the sensor electrode and the reference electrode. The heat transfer member is made of a dense metallic oxide material which blocks passage of measurement gas therethrough. The heat transfer member is held between the sensor electrode and the first insulator in which the heater is embedded within the gas chamber and works to facilitate transfer of thermal energy, as generated by the heater, to the solid electrolyte body, the sensor electrode, and the reference electrode. This results in enhanced thermal conductivity of the sensor device and achieves quick activation of the sensor device.

公开(公告)号：US20200064303A1

公开(公告)日：2020-02-27

申请号：US16547966

申请日：2019-08-22

Applicant: DENSO CORPORATION

Inventor： Masatoshi IKEDA ,  Shota HAGINO ,  Makoto ITO ,  Daisuke KAWAI

IPC: G01N27/407

Abstract: In a gas sensor element, an electrolyte layer has a solid electrolyte body having oxygen ionic conductivity. A first insulation body is stacked at a first surface side of the electrolyte layer. A second insulation body is stacked at a second surface side of the electrolyte layer. A measurement gas chamber is surrounded by the electrolyte layer and the first insulation body, into which a detection target gas is introduced. A reference gas chamber is surrounded by the electrolyte layer and the second insulation body, into which a reference gas is introduced. A heater is embedded in the first insulation body. The second insulation body has a low thermal conductivity part having a thermal conductivity which is lower than a thermal conductivity of a heater embedded part formed in the first insulation body in which the heater is embedded.

公开(公告)号：US20210181140A1

公开(公告)日：2021-06-17

申请号：US17181212

申请日：2021-02-22

Applicant: DENSO CORPORATION

Inventor： Masatoshi IKEDA ,  Shota HAGINO ,  Makoto ITO ,  Daisuke KAWAI

IPC: G01N27/406 ,  G01N27/407 ,  G01N27/409 ,  H05B3/03 ,  H05B3/18

Abstract: A gas sensor element has an electrolyte layer, a first insulator, a second insulator, a measurement gas chamber, and a reference gas chamber. The electrolyte layer includes a holding plate and a solid electrolyte body. The first insulator is laminated on one side of the electrolyte layer, and the second insulator is laminated on the other side of the electrolyte layer. At least a part of the boundary portion between the placement hole and the solid electrolyte body is sandwiched between a first sandwiching portion of the first insulator and a second sandwiching portion of the second insulator.

公开(公告)号：US20200209184A1

公开(公告)日：2020-07-02

申请号：US16813995

申请日：2020-03-10

Applicant: DENSO CORPORATION

Inventor： Masatoshi IKEDA ,  Shota HAGINO ,  Chika NAMEKATA

IPC: G01N27/409 ,  G01N27/407

Abstract: A gas sensor element includes a solid electrolyte body having oxygen ion conductivity, a measurement electrode provided on one surface of the solid electrolyte body and exposed to a measurement gas, and a reference electrode provided on the other surface of the solid electrolyte body and exposed to a reference gas. Both the measurement electrode and the reference electrode include noble metal particles, solid electrolyte particles having oxygen ion conductivity, and pores. The measurement electrode comprises a surface measurement electrode layer comprising a surface serving as a contact surface with the measurement gas and an intermediate measurement electrode layer disposed in contact with a surface at solid electrolyte body side of the surface measurement electrode layer. The surface measurement electrode layer has a higher porosity than the intermediate measurement electrode layer has. The gas sensor comprises the gas sensor element.

公开(公告)号：US20190049404A1

公开(公告)日：2019-02-14

申请号：US16079119

申请日：2016-12-14

Applicant: DENSO CORPORATION

Inventor： Masatoshi IKEDA ,  Makoto ITO

IPC: G01N27/41 ,  G01N27/416 ,  G01N27/409 ,  G01N27/30

Abstract: A gas sensor element includes a solid electrolyte plate, and a measurement electrode and a reference electrode provided on surfaces of the solid electrolyte plate. In a section plane of the reference electrode along a thickness direction, noble metal regions, solid electrolyte regions, mixed regions, and void spaces are present. When a ratio of an area B of the mixed regions in the section plane with respect to an area A of the reference electrode in the section plane is a mixed region ratio B/A, and a ratio of an area C of the void spaces in the section plane with respect to the area A of the reference electrode in the section plane is a void space ratio C/A, a parameter value as a product of the mixed region ratio B/A and the void space ratio C/A falls within a range of 0.001 to 0.01.