公开(公告)号：US20220074888A1

公开(公告)日：2022-03-10

申请号：US17526610

申请日：2021-11-15

Applicant: DENSO CORPORATION

Inventor： Shota HAGINO ,  Satoshi NAKAMURA ,  Masato OZAWA

IPC: G01N27/407 ,  G01N33/00

Abstract: A gas sensor includes a sensor element, a housing, a contact terminal, a second insulator, a lead wire, a sealing member, an inner periphery side cover and an outer periphery side cover. The inner periphery side cover is mounted on an outer periphery at a position on a base end side in an axial direction of the housing. The outer periphery side cover is disposed on the outer periphery side of the inner periphery side cover, forms a substantially cylindrical space with the inner periphery side cover and holds the sealing member on an inner periphery side.

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：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：US20210404985A1

公开(公告)日：2021-12-30

申请号：US17473246

申请日：2021-09-13

Applicant: DENSO CORPORATION

Inventor： Kazutoshi KODAMA ,  Masato OZAWA ,  Shota HAGINO

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

Abstract: In a gas sensor, a housing is formed into a cylindrical shape. A holding portion is arranged inside the housing and is formed into a cylindrical shape that has a through hole that passes through in an axial direction, when a direction in which an axis of the housing extends is the axial direction. A sensor element is formed to extend in the axial direction in a state where the sensor element passes through the through hole in the holding portion and detects a gas to be measured on one side in the axial direction. A glass seal is arranged inside the holding portion, is made of a glass material, and seals between the sensor element and the holding portion. A shock mitigating portion that mitigates shock being transferred from outside the housing through the holding portion to the glass seal is housed between the housing and the holding portion.

公开(公告)号：US20190227027A1

公开(公告)日：2019-07-25

申请号：US16313551

申请日：2017-05-15

Applicant: DENSO CORPORATION

Inventor： Keisuke MIZUTANI ,  Keigo MIZUTANI ,  Shota HAGINO ,  Mitsunobu NAKATO ,  Takashi ARAKI

IPC: G01N27/419 ,  G01N27/407 ,  G01N27/41 ,  F01N13/00

Abstract: The present invention provides a gas sensor capable of suppressing a variation of a sensor output by a sensor cell to be small. A sensor element of a gas sensor comprises a first solid electrolyte body and a second solid electrolyte body having oxygen ion conductivity, a measured gas chamber into which the measured gas is introduced, a first reference gas chamber and a second reference gas chamber into which reference gas is introduced, a first pump cell, a second pump cell, a sensor cell, and a heater. A value obtained by dividing a first average cross-sectional area of the first reference gas chamber by the first length is larger than the value obtained by dividing the second average cross-sectional area of the second reference gas chamber by the second length.

公开(公告)号：US20220065809A1

公开(公告)日：2022-03-03

申请号：US17522343

申请日：2021-11-09

Applicant: DENSO CORPORATION

Inventor： Shota HAGINO ,  Satoshi NAKAMURA ,  Masato OZAWA

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/406

Abstract: A gas sensor includes a sensor element, a housing, a contact terminal, an insulator, a lead wire, a sealing member, and a base-side cover. A circular protrusion of the housing is provided with a root portion connected to a flange and a diameter reduction portion which is located on the base side of the root portion in an axial direction and whose outer periphery has a diameter reduced with respect to that of the root portion. An outer diameter of the diameter reduction portion is smaller than an outer diameter of the root portion. An end portion on the tip side of the base-side cover in the axial direction is jointed to the outer periphery of the diameter reduction portion.

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：US20190391108A1

公开(公告)日：2019-12-26

申请号：US16448092

申请日：2019-06-21

Applicant: DENSO CORPORATION

Inventor： Hao WU ,  Shota HAGINO ,  Hiroki ICHIKAWA

IPC: G01N27/406 ,  G01N27/49 ,  G01N27/407

Abstract: A nitrous oxide concentration detector includes a control unit. In the control unit, a first control section controls a voltage application section and a heater to achieve a first state in which nitric oxide undergoes electrolysis and nitrous oxide does not undergo electrolysis. A second control section controls the voltage application section and the heater to achieve a second state in which nitric oxide and nitrous oxide undergo electrolysis. An estimation section estimates an estimated current that flows between a first electrode and a second electrode due to electrolysis of nitric oxide in the second state based on a first current detected by a current detector in the first state. A calculation section calculates a nitrous oxide concentration based on a third current obtained by subtracting the estimated current estimated by the estimation section from a second current detected by the current detector in the second state.