公开(公告)号：US11933757B2

公开(公告)日：2024-03-19

申请号：US15521967

申请日：2015-10-20

Applicant: DENSO CORPORATION

Inventor： Yuusuke Kawamoto ,  Yuusuke Toudou ,  Takashi Araki

IPC: G01N27/41 ,  G01N27/406 ,  G01N27/407

CPC classification number: G01N27/41 ,  G01N27/4067 ,  G01N27/4077 ,  G01N27/4078

Abstract: A gas sensor is equipped with a housing, an insulator retained by an inner periphery of the housing, a sensing device having a front end portion protruding from a front end surface of the insulator, and a protective cover which covers a front end portion of the sensing device. A pump electrode and a sensor electrode are disposed in a front end portion of the solid electrolyte body. The pump electrode is exposed to a measurement gas and regulates the concentration of oxygen in the measurement gas. The sensor electrode is exposed to the measurement gas and measures the concentration of a given gas component in the measurement gas after being regulated in concentration of oxygen by the pump electrode. A base end portion of the sensor electrode in a lengthwise direction is located closer to a base end side of the gas sensor than a front end surface of the housing is. This minimizes a variation in temperature of the sensor electrode and enhances the accuracy in measuring the concentration of the given gas component.

公开(公告)号：US09417135B2

公开(公告)日：2016-08-16

申请号：US13788473

申请日：2013-03-07

Applicant: DENSO CORPORATION

Inventor： Yuusuke Toudou ,  Tsunenobu Hori ,  Sotoo Takahashi

IPC: G01K7/00 ,  G01K7/16

CPC classification number: G01K7/16 ,  G01K2007/163 ,  G01K2205/04

Abstract: The temperature sensor includes a thermo-sensitive element, first and second electrode wires electrically connected to the thermo-sensitive element, first and second signal wires partially overlapped with and connected to the first and second electrode wires, respectively. The first and second electrode wires are made of a first metal material consisting primarily of Pt. The first and second signal wires are made of a second metal material containing Al and having a linear thermal expansion coefficient larger than that of the first metal material. Each of an overlap portion of the first electrode wire and the first signal wire and an overlap portion of the second electrode wire and the second signal wire includes a junction part formed by melting and thereafter coagulating the first or second electrode wire and the first or second signal wire. The junction part includes an oxidation film containing Al formed on a surface thereof.

Abstract translation: 温度传感器包括热敏元件，电连接到热敏元件的第一和第二电极线，分别与第一和第二电极线部分重叠并连接到第一和第二电极线的第一和第二信号线。 第一和第二电极线由主要由Pt组成的第一金属材料制成。 第一和第二信号线由含有Al的第二金属材料制成，其线性热膨胀系数大于第一金属材料的线性热膨胀系数。 第一电极线和第一信号线的重叠部分和第二电极线和第二信号线的重叠部分中的每一个包括通过熔化形成的接合部分，然后使第一或第二电极线和第一或第二电极线凝结 信号线。 接合部包括在其表面上形成有包含Al的氧化膜。

公开(公告)号：US11035821B2

公开(公告)日：2021-06-15

申请号：US15515262

申请日：2015-10-01

Applicant: DENSO CORPORATION

Inventor： Yuusuke Toudou ,  Takehito Kimata ,  Yuusuke Kawamoto

IPC: G01N27/407 ,  G01N27/41 ,  G01N27/419 ,  G01N27/406

Abstract: A gas concentration detection apparatus is provided with a measuring gas chamber, a solid electrolyte body, a pump cell, a sensor cell, a pump cell controller and a sensor cell detection section. The pump cell controller applies an elimination voltage to the pump cell at a start-up point, before a gas concentration is detected. The water in the measuring gas chamber is decomposed and hydrogen is generated by application of the elimination voltage. Oxygen occluded in a sensor electrode of the sensor cell is removed by the hydrogen.

公开(公告)号：US10921283B2

公开(公告)日：2021-02-16

申请号：US15105177

申请日：2014-12-16

Applicant: DENSO CORPORATION

Inventor： Mitsunobu Nakatou ,  Keigo Mizutani ,  Takashi Araki ,  Yuusuke Toudou

IPC: G01N27/41 ,  G01N27/419 ,  G01N33/00 ,  G01N27/407 ,  G01N27/406 ,  G01N27/409

Abstract: A gas sensor includes a solid electrolyte, a gas chamber, a reference gas chamber, a pump cell, a monitor cell, and a sensor cell. The gas chamber has a spatial width W0 constant in a width direction W orthogonal to the direction of flow of a gas in a position where the pump electrode, the monitor electrode, and the sensor electrode are provided on the solid electrolyte. An amount of shift ΔX1 of a central position O2 of a gap S in the width direction W between the monitor electrode and the sensor electrode from a central position O1 in the width direction of the pump electrode has relationship of ΔX1≤¼ W1 where the pump electrode has a width W1. In addition, positions ΔY1 of a of a side surface of the monitor electrode and of a side surface of the sensor electrode from the central position O1 in the width direction W of the pump electrode have relationship of ΔY1≤½ W1.

公开(公告)号：US10073053B2

公开(公告)日：2018-09-11

申请号：US14914370

申请日：2014-08-29

Applicant: DENSO CORPORATION

Inventor： Yuusuke Toudou ,  Takehito Kimata ,  Toru Katafuchi

IPC: G01N27/417 ,  G01N27/419 ,  G01N27/407

CPC classification number: G01N27/4175 ,  G01N27/407 ,  G01N27/419

Abstract: A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.

公开(公告)号：US10309923B2

公开(公告)日：2019-06-04

申请号：US15325206

申请日：2015-07-08

Applicant: DENSO CORPORATION

Inventor： Yuusuke Toudou ,  Takehito Kimata ,  Mitsunobu Nakatou

IPC: G01N27/407 ,  G01N27/41

Abstract: A gas sensor device is equipped with the sensor cell, the pump cell, the inner void space, and the gas inlet. The sensor cell is created by a portion of the solid electrolyte body and a pair of sensor electrodes disposed on the solid electrolyte body. The pump cell is created by a portion of the solid electrolyte body and a pair of pump electrodes disposed on the solid electrolyte body. The inner void space faces the sensor electrode and the pump electrode. If a dimension of said gas inlet in a direction in which the measurement gas flows in the gas inlet is defined as L1, a sectional area of the gas inlet taken perpendicular to the direction of flow of the measurement gas in the gas inlet is defined as S1, a distance between the gas inlet and the sensor cell is defined as L2, and a sectional area of the inner void space taken perpendicular to a direction in which the pump cell and the sensor cell are aligned with each other is defined as S2, a relation of 1000≤(L1/S1)×(L2/S2)≤5000 is met.

公开(公告)号：US10261045B2

公开(公告)日：2019-04-16

申请号：US15319128

申请日：2015-06-15

Applicant: DENSO CORPORATION

Inventor： Yuusuke Kawamoto ,  Yuusuke Toudou

IPC: G01N27/407 ,  G01N27/41 ,  G01N27/409 ,  G01N27/406

Abstract: A sensor structural body, which is formed by stacking a sensor element and a heater, has a sensor protruding portion that protrudes distalward from a holder. The sensor element includes a solid electrolyte body, a measured-gas space, a reference-gas space, a pump cell, a monitor cell and a sensor cell. A heat-generating portion of the heater is entirely arranged in the sensor protruding portion. The length L (in mm) of a formation region of the heat-generating portion and the length H (in mm) of the sensor protruding portion in a longitudinal direction, in which the sensor protruding portion protrudes from the holder, are set to be in a range that is enclosed by first to fourth reference lines X1, X2, X3 and X4 on a two-dimensional coordinate plane whose horizontal and vertical axes respectively indicate the lengths L and H. The first to the fourth reference lines X1-X4 respectively represent the relationships of H=L, H=20, H=−4.24L+42.71 and H=−4.24L+68.6.

公开(公告)号：US10113992B2

公开(公告)日：2018-10-30

申请号：US15947037

申请日：2018-04-06

Applicant: DENSO CORPORATION

Inventor： Yuusuke Toudou ,  Takehito Kimata ,  Toru Katafuchi

IPC: G01N27/407 ,  G01N27/417 ,  G01N27/419

Abstract: A gas concentration measuring apparatus is provided which works to calculate the concentration of a given gas component with enhanced accuracy. The gas concentration measuring apparatus 1 includes, a gas sensor 10 and a calculating portion 11. The gas sensor 10 is equipped with a pump cell 3, a monitor cell 4, and a sensor cell 5. The calculating portion 11 subtracts a monitor cell current Im that is a current flowing through the monitor cell 4 from a sensor cell current Is that is a current flowing through the sensor cell 5 to calculate the concentration of the given gas component in gas g. When calculating the concentration of the given gas component, the calculating portion 11 performs a correction operation to bring a value of the monitor cell current Im close to a value of an oxygen dependent current Iso that is a component of the sensor cell current Is which arises from the concentration of oxygen.