公开(公告)号：US11994485B2

公开(公告)日：2024-05-28

申请号：US16763143

申请日：2018-10-10

Applicant: Robert Bosch GmbH

Inventor： Alexandros Ninos ,  Thomas Claus ,  Ye Lu ,  Christoph Brueser

IPC: G01N27/12 ,  G01N27/14 ,  G01N27/407 ,  G01N33/00

CPC classification number: G01N27/124 ,  G01N27/12 ,  G01N27/14 ,  G01N27/407 ,  G01N27/4077 ,  G01N33/0009 ,  G01N33/0031

Abstract: A method for operating a gas sensor device, which is equipped with at least one gas-sensitive electrical sensor resistor, a heating element for the controlled heating of the sensor resistor, a detection element for detecting the resistance value of the sensor resistor, and a signal processing element for processing measuring signals. In the method, measurements are carried out in time intervals, in which the resistance value of the sensor resistor is detected as a measuring signal, and the sensor resistor is heated for each measurement, the heating element being operated discontinuously in heating intervals and each measurement being assigned a heating interval. Measurements are automatically carried out in predefinable time intervals, and additional measurements are initiatable at arbitrary times. The duration of the heating intervals assigned to the individual measurements being selected as a function of the time interval to the preceding heating interval.

公开(公告)号：USRE49874E1

公开(公告)日：2024-03-19

申请号：US17350702

申请日：2021-06-17

Applicant: NGK Spark Plug Co., LTD.

Inventor： Takehiro Oba ,  Shogo Nagata ,  Shunya Mihara

IPC: G01N27/406 ,  G01N33/00 ,  H01R43/20 ,  G01N27/407 ,  H01R4/48 ,  H01R13/42 ,  H01R33/76

CPC classification number: G01N33/0037 ,  H01R43/20 ,  G01N27/4062 ,  G01N27/4067 ,  G01N27/4077 ,  H01R4/4809 ,  H01R13/42 ,  H01R33/7685 ,  Y02A50/20

Abstract: A gas sensor includes a sensing element having an electrode pad a metal terminal, and a separator that has insertion holes in which the metal terminal is held. The metal terminal includes a main body and an elastic portion that is integrally connected to the main body and is elastically connected to the electrode pad at a predetermined contact point. The main body includes a front-end-side restricting portion and a rear-end-side restricting portion that restrict the movement of the main body by contacting wall surfaces of the insertion hole when the main body moves in a direction intersecting the direction of an axial line. The contact point is located between the front-end-side restricting portion and the rear-end-side restricting portion in the direction of the axial line. The front-end-side restricting portion and the rear-end-side restricting portion are connected to each other so that a flat board portion is interposed therebetween.

公开(公告)号：US11933750B2

公开(公告)日：2024-03-19

申请号：US16972903

申请日：2019-02-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masana Okai ,  Kouji Matsuo ,  Daisuke Tahira

IPC: G01N27/00 ,  G01M15/10 ,  G01N27/12 ,  G01N27/407 ,  G01N33/00

CPC classification number: G01N27/00 ,  G01M15/102 ,  G01N27/12 ,  G01N27/407 ,  G01N27/4077 ,  G01N33/0009 ,  G01N33/0031

Abstract: A ceramic member unit includes at least insertion members and a ceramic member having insertion sections into which the insertion members are inserted respectively. Each of the insertion sections has at least an insertion opening which opens on a deeper side of an introduction opening in the surface of the ceramic member while communicating with the introduction opening and into which the insertion member can be inserted. The insertion section further has taper hole portions becoming narrower toward the insertion opening in a communication region between the introduction opening and the insertion opening. The taper hole portions are connected to the insertion opening while increasing in a taper angle toward the insertion opening.

公开(公告)号：US11921079B2

公开(公告)日：2024-03-05

申请号：US17189293

申请日：2021-03-02

Applicant: NGK INSULATORS, LTD.

Inventor： Ryo Onishi

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

CPC classification number: G01N27/4077 ,  G01N27/4067 ,  G01N33/0037

Abstract: A gas sensor sensing a sensing target gas component contained in a measurement gas and identifying concentration of the sensing target gas component includes: a sensor element having an inlet for the measurement gas on one end portion, and including: an element base made of an oxygen-ion conductive solid electrolyte; a heater buried in the element base; and a porous leading-end protective layer covering a predetermined range of the element base on the one end portion; and a metallic member within which the sensor element is fixedly disposed, wherein a minimum distance between the sensor element and an inner surface of the metallic member is 0.20 mm or more and 0.95 mm or less, and a portion of the inner surface of the metallic member closest to the sensor element has an arithmetic average roughness of 5 μm or less.

公开(公告)号：US11921078B2

公开(公告)日：2024-03-05

申请号：US17411081

申请日：2021-08-25

Applicant: NGK INSULATORS, LTD.

Inventor： Tomoki Nagae ,  Yoshimasa Kondo ,  Yusuke Ogiso ,  Katsunao Uenishi ,  Atsushi Watanabe ,  Ayato Koizumi

IPC: G01N27/407

CPC classification number: G01N27/4074 ,  G01N27/4076 ,  G01N27/4077 ,  G01N27/4078

Abstract: A sensor element includes an element body and a porous protective layer arranged to cover a part of a surface of the element body. The protective layer includes an inlet protective layer arranged to cover a gas inlet formed in the surface of the element body, and at least a part of a face included in the surface of the element body, the face on which the gas inlet is opens, and an arithmetic average roughness Rap of an inner peripheral surface of an internal space of the inlet protective layer satisfies at least one of conditions below: the arithmetic average roughness Rap is 8 μm or more, and the arithmetic average roughness Rap is higher than an arithmetic average roughness Rac of a bonding surface of the protective layer, the bonding surface at which the protective layer is bonded to the element body.

公开(公告)号：US11913900B2

公开(公告)日：2024-02-27

申请号：US17740789

申请日：2022-05-10

Applicant: NGK INSULATORS, LTD.

Inventor： Yusuke Watanabe ,  Mika Kai ,  Ryo Onishi ,  Saki Suzuki

IPC: G01N27/41 ,  G01N27/407

CPC classification number: G01N27/41 ,  G01N27/4077

Abstract: A sensor element includes: an element base including: a ceramic body made of an oxygen-ion conductive solid electrolyte, and having an inlet at one end portion thereof; at least one internal chamber located inside the ceramic body, and communicating with the inlet under predetermined diffusion resistance; an electrochemical pump cell including an electrode located on an outer surface of the ceramic body, an electrode facing the internal chamber, and a solid electrolyte located therebetween; and a heater buried in the ceramic body; and a porous leading-end protective layer surrounding a first range at least including a leading end surface and a region to be coped with water-induced cracking specified in advance. A single heat insulating space is interposed between the leading-end protective layer and a whole side surface of the element base at least in the above region.

公开(公告)号：US20240003841A1

公开(公告)日：2024-01-04

申请号：US18467042

申请日：2023-09-14

Applicant: NGK INSULATORS, LTD.

Inventor： Ryo ONISHI ,  Kaoru SHIBUTANI

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/30 ,  G01N27/41

CPC classification number: G01N27/4077 ,  G01N27/41 ,  G01N27/304 ,  G01N33/0027

Abstract: A sensor element includes: an element body including an oxygen-ion-conductive solid electrolyte layer; and a protective layer that covers at least part of the element body and is a porous body having a plurality of pores thereinside. The standard deviation of the porosity of the protective layer is 2.3% or less.

公开(公告)号：US11782016B2

公开(公告)日：2023-10-10

申请号：US15977204

申请日：2018-05-11

Applicant: DENSO CORPORATION

Inventor： Junta Zushi ,  Makoto Ito

IPC: G01N27/407

CPC classification number: G01N27/4076 ,  G01N27/4071 ,  G01N27/4075 ,  G01N27/4077

Abstract: A gas sensor which detects a concentration of a specific gas contained in a gas to be measured is provided with a gas sensor element. The gas sensor element has an ion conductive solid electrolyte body, a measuring gas electrode which is mounted on a surface of the solid electrolyte body, a reference gas electrode mounted on a surface of the solid electrolyte body, and a catalyst layer mounted on an outer-side relative to the measuring gas electrode-side. The catalyst layer contains a metal catalyst loaded onto a carrier. The metal catalyst is a Pt single substance, and has a specific surface area defined by the equation below of equal to or more than 0.01 to equal to or less than 23: Specific surface area=total surface area of metal catalyst which exists on an electrode unit surface area/actual surface area of electrode per electrode unit surface area.

公开(公告)号：US20230314363A1

公开(公告)日：2023-10-05

申请号：US18185607

申请日：2023-03-17

Applicant: NGK INSULATORS, LTD.

Inventor： Shotaro NIIZUMA ,  Yusuke WATANABE ,  Toshihiro HIRAKAWA ,  Kirari TAKAHASHI

IPC: G01N27/407

CPC classification number: G01N27/4077

Abstract: A sensor element includes: an element body that includes a base part in an elongated plate shape and a measurement-object gas flow part; and a porous protective layer that is formed from one end and covers at least a part in the longitudinal direction of a surface of the element body. The protective layer include: an inner layer; and an outer layer covering the inner layer and a region where the inner layer is not formed. On one principal surface in a region where the inner layer is formed, a first space exists in at least a part between the inner and outer layers, and on the one principal surface in a region where the inner layer is not formed on the one principal surface on which the first space exists, a second space exists in at least a part between the one principal surface and the outer layer.

公开(公告)号：US11714062B2

公开(公告)日：2023-08-01

申请号：US16786082

申请日：2020-02-10

Applicant: DENSO CORPORATION

Inventor： Tomotaka Mouri ,  Shota Imada ,  Toru Takeuchi

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

CPC classification number: G01N27/4077 ,  G01N27/409 ,  G01N27/4067 ,  G01N27/4072

Abstract: A gas sensor element for detecting a specific gas component in a measured gas, comprising: an element body in the form of a long plate having a gas detection part at an end thereof on a distal end face side in a longitudinal direction; and a porous protective layer covering an outer periphery of the end on said end face side of the element body, wherein in a cross section including two adjacent ones of the end face and side faces connected to the end face, an outer surface of the protective layer facing an element corner where the two faces meet has a shape with a corner part, and a ratio of an assumed diameter of a water droplet contained in the measured gas in a use environment to an effective length of the corner part in the cross section is equal to or larger than 1.5.