公开(公告)号：US20190285563A1

公开(公告)日：2019-09-19

申请号：US16434559

申请日：2019-06-07

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Takao MURASE ,  Masashi YASUI

IPC: G01N27/02 ,  G01N33/00 ,  G01N27/407

Abstract: A gas sensor 10 includes a tubular protective cover 30 having an element chamber 37 therein and configured to allow a measured gas to flow from the outside into the element chamber 37. The gas sensor 10 also includes a long sensor element 20, including a detecting portion 23 located in the element chamber 37 and configured to detect a specified gas concentration in the measured gas, and an insulator 45 having an inclined through-hole into which the sensor element 20 is inserted. An inclination angle θt of an axial direction of the sensor element 20 (i.e., a direction parallel to an element axis A1) in the element chamber 37 with respect to an axial direction of the protective cover 30 (i.e., a direction parallel to a cover axis A2) is 1° or greater.

公开(公告)号：US20170059540A1

公开(公告)日：2017-03-02

申请号：US15241378

申请日：2016-08-19

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Takao MURASE ,  Masashi YASUI

IPC: G01N33/00

CPC classification number: G01N33/0027 ,  G01N27/4077 ,  G01N27/4118

Abstract: Provided is a gas sensor in which a protective cover has no looseness even by repetitive use. The gas sensor includes a sensor element for detecting a predetermined measurement target gas component in a measurement gas; a protective cover which protects a side of one end portion of the sensor element; and a housing which houses the sensor element. The protective cover includes a brim portion at one end portion of an outer surface of the protective cover. The brim portion is brought into contact with a contact surface provided in said housing, and is held between a swaging portion and the contact surface, the swaging portion extending from the contact surface while bending, so that the protective cover is fixed to the housing. The brim portion is tilted at a tilt angle of 5° or more and 15° or less relative to a plane vertical to a central axis of the gas sensor.

Abstract translation: 提供一种气体传感器，其中保护罩即使通过重复使用也不会松动。 气体传感器包括用于检测测量气体中的预定测量目标气体成分的传感器元件; 保护盖，其保护传感器元件的一个端部的一侧; 以及容纳传感器元件的壳体。 保护盖在保护罩的外表面的一个端部处包括边缘部分。 边缘部分与设置在所述壳体中的接触表面接触并且被保持在模锻部分和接触表面之间，所述型锻部分在弯曲的同时从接触表面延伸，使得保护盖固定到壳体。 边缘部相对于与气体传感器的中心轴垂直的平面以5°以上且15°以下的倾斜角度倾斜。

公开(公告)号：US20170052144A1

公开(公告)日：2017-02-23

申请号：US15238855

申请日：2016-08-17

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Takao MURASE ,  Masashi YASUI

IPC: G01N27/406 ,  G01N27/407 ,  H05B3/26 ,  H05B1/02 ,  H05B3/00

Abstract: A heater section includes a plate-like ceramic body (a first substrate layer 1, a second substrate layer 2, and a third substrate layer 3) having a longitudinal direction (front-rear direction) and a short-length direction (left-right direction), and a heater 72 disposed within the plate-like ceramic body and including a lead section 79 and a heating section 76 connected to the lead section 79. The heating section 76 includes a straight portion 78 extending along the longitudinal direction, and a lead side curved portion 77b connected to one of the ends of the straight portion 78 closer to the lead section 79. The lead side curved portion 77b has a lower resistance per unit length than the straight portion 78 at one or more temperatures in the range of 700° C. to 900° C.

Abstract translation: 加热器部分包括具有纵向（前后方向）和短长度方向（左右）的板状陶瓷体（第一基板层1，第二基板层2和第三基板层3） 方向）以及设置在板状陶瓷体内的加热器72，其包括引线部79和与引线部79连接的加热部76.加热部76具有沿着长度方向延伸的直线部78， 引线侧弯曲部分77b连接到更靠近引线部分79的直线部分78的一个端部。引线侧弯曲部分77b在一个或多个温度范围内具有比直线部分78单位长度更低的电阻， 700°C至900°C

公开(公告)号：US20250093293A1

公开(公告)日：2025-03-20

申请号：US18961877

申请日：2024-11-27

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE

IPC: G01N27/41 ,  G01N33/00

Abstract: A gas sensor includes a sensor element and a control unit thereof. The sensor element includes: a base part; a measurement-object gas flow cavity; a reference gas chamber separated from the measurement-object gas flow cavity and closed inside the base part; a reference electrode disposed in the reference gas chamber; and a pump electrode disposed at a position different from the reference gas chamber. The control unit includes: a storing part storing in advance, a required amount of oxygen to be present in the reference gas chamber at a time at which oxygen concentration in the reference gas chamber is a predetermined concentration; and a processing part performing refresh processing in which a current is applied between the pump electrode and the reference electrode to pump out oxygen from the reference gas chamber, and then pump oxygen into the reference gas chamber in the required amount of the oxygen.

公开(公告)号：US20240230583A9

公开(公告)日：2024-07-11

申请号：US18489302

申请日：2023-10-18

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Daichi ICHIKAWA

IPC: G01N27/409 ,  G01N27/12 ,  G01N27/30 ,  G01N27/41 ,  G01N27/419 ,  G01N33/00

CPC classification number: G01N27/409 ,  G01N27/12 ,  G01N27/301 ,  G01N27/41 ,  G01N27/419 ,  G01N33/0037 ,  G01N27/4067

Abstract: A gas sensor includes a sensor element including an element body, a measurement pump cell including an inner measurement electrode, an adjustment pump cell including an inner adjustment electrode and a reference electrode, a control apparatus that performs an adjustment pump control process of adjusting the oxygen concentration in the oxygen concentration adjustment chamber so that an adjustment voltage reaches an adjustment voltage target value, and a measurement pump control process of pumping out oxygen in the measurement chamber so that a measurement voltage reaches a measurement voltage target value. The control apparatus detects the specific gas concentration in the measurement-object gas based on a measurement pump current, and the control apparatus detects a water concentration in the measurement-object gas based on a change in the measurement pump current when at least one of the adjustment voltage target value or the measurement voltage target value is changed.

公开(公告)号：US20240133840A1

公开(公告)日：2024-04-25

申请号：US18489302

申请日：2023-10-17

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Daichi ICHIKAWA

IPC: G01N27/409 ,  G01N27/12 ,  G01N27/30 ,  G01N27/41 ,  G01N27/419 ,  G01N33/00

CPC classification number: G01N27/409 ,  G01N27/12 ,  G01N27/301 ,  G01N27/41 ,  G01N27/419 ,  G01N33/0037 ,  G01N27/4067

Abstract: A gas sensor includes a sensor element including an element body, a measurement pump cell including an inner measurement electrode, an adjustment pump cell including an inner adjustment electrode and a reference electrode, a control apparatus that performs an adjustment pump control process of adjusting the oxygen concentration in the oxygen concentration adjustment chamber so that an adjustment voltage reaches an adjustment voltage target value, and a measurement pump control process of pumping out oxygen in the measurement chamber so that a measurement voltage reaches a measurement voltage target value. The control apparatus detects the specific gas concentration in the measurement-object gas based on a measurement pump current, and the control apparatus detects a water concentration in the measurement-object gas based on a change in the measurement pump current when at least one of the adjustment voltage target value or the measurement voltage target value is changed.

公开(公告)号：US20240044835A1

公开(公告)日：2024-02-08

申请号：US18359846

申请日：2023-07-26

Applicant: NGK INSULATORS, LTD.

Inventor： Shingo TANAKA ,  Yusuke WATANABE ,  Ryo HASHIKAWA

IPC: G01N27/409 ,  G01N27/419 ,  G01N27/407

CPC classification number: G01N27/409 ,  G01N27/419 ,  G01N27/4073

Abstract: A gas sensor includes a sensor element and a control device, and detects a specific gas concentration that is a concentration of a specific gas in a measurement-object gas. The sensor element includes an element body including an oxygen-ion-conductive solid electrolyte layer and provided with a measurement-object gas flow portion therein, the measurement-object gas flow portion introducing the measurement-object gas and causing the measurement-object gas to flow therethrough; a measurement electrode disposed in a measurement chamber of the measurement-object gas flow portion; and a reference electrode disposed inside the element body to come into contact with a reference gas that serves as a reference for detection of the specific gas concentration. The control device measures a voltage across the ground and the reference electrode, and identifies a deviation of the reference potential that is the electrical potential of the reference electrode based on the measured voltage.

公开(公告)号：US20240027393A1

公开(公告)日：2024-01-25

申请号：US18353938

申请日：2023-07-18

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Daichi ICHIKAWA

IPC: G01N27/407 ,  G01N33/00

CPC classification number: G01N27/4072 ,  G01N33/0073 ,  G01N33/0062 ,  G01N33/0037

Abstract: Provided is a gas sensor element or the like in which a diffusion mode of NOx reaching a measurement electrode is changed from molecular diffusion to a mode of diffusing while repeatedly colliding with a wall face of a sufficiently narrow flow path. In a gas sensor element according to one aspect of the present invention, a porous diffusion layer covering a measurement electrode has a porosity that is lower than the porosity of a leading end protection layer covering at least a face of an element substrate in which a gas inlet is open, and that is 5% or more and 25% or less.

公开(公告)号：US20240027389A1

公开(公告)日：2024-01-25

申请号：US18353940

申请日：2023-07-18

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke WATANABE ,  Daichi ICHIKAWA

IPC: G01N27/30 ,  G01N33/00 ,  G01N27/333

CPC classification number: G01N27/304 ,  G01N33/0027 ,  G01N27/333

Abstract: Provided is a gas sensor element or the like in which the diffusion mode of NOx that reaches a measurement electrode is changed from molecular diffusion to a mode of diffusing while repeatedly colliding with a wall face of a sufficiently narrow flow path. In a gas sensor element according to one aspect of the invention, a porous diffusion layer, which accounts for 70% or more of a cross-section of a flow path of a measurement target gas that is orthogonal to a flow direction of the measurement target gas, has a porosity of 5% or more and 25% or less, and is located at a position that is upstream of the measurement electrode and where the distance to the measurement electrode is 0.15 mm or less.

公开(公告)号：US20240011938A1

公开(公告)日：2024-01-11

申请号：US18472569

申请日：2023-09-22

Applicant: NGK INSULATORS, LTD.

Inventor： Takayuki SEKIYA ,  Yusuke WATANABE ,  Kodai ICHIKAWA

IPC: G01N27/409 ,  G01N33/00 ,  G01N27/41

CPC classification number: G01N27/409 ,  G01N33/0027 ,  G01N27/41

Abstract: A sensor element is for detecting a specific gas concentration in a measurement-object gas, and includes: an element body internally provided with a measurement-object gas flow portion; an adjustment chamber pump cell having an adjustment electrode disposed in an oxygen concentration adjustment chamber of the measurement-object gas flow portion, and a pump outer electrode disposed outside the element body, the adjustment chamber pump cell being configured to pump out oxygen from the oxygen concentration adjustment chamber or pump oxygen into the oxygen concentration adjustment chamber; a reference-gas introduction portion disposed inside the element body; and an outer sensor cell having a voltage outer electrode disposed outside the element body, and a reference electrode disposed inside the element body, the outer sensor cell being configured to generate a voltage based on an oxygen concentration in the measurement-object gas outside the element body.