公开(公告)号：US10928354B2

公开(公告)日：2021-02-23

申请号：US15852115

申请日：2017-12-22

Applicant: DENSO CORPORATION

Inventor： Toshihiko Harada ,  Shinya Teranishi ,  Satoshi Nakamura ,  Hiroaki Yoto

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

Abstract: Disclosed is an ammonia sensor element having a measured gas chamber, a reference gas chamber and a solid electrolyte body arranged therebetween. The solid electrolyte body has a first main surface facing the measured gas chamber and a second main surface facing the reference gas chamber. A detection electrode is formed on the first main surface. A reference electrode is formed on the second main surface. The solid electrolyte body contains a first proton conducting solid electrolyte. The detection electrode contains a second proton conducting solid electrolyte. The second proton conducting solid electrolyte has an acid strength greater than that of the first proton conducting solid electrolyte.

公开(公告)号：US12222312B2

公开(公告)日：2025-02-11

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 ,  G01N27/409

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：US10371659B2

公开(公告)日：2019-08-06

申请号：US15545864

申请日：2016-02-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Tetsuya Kato ,  Satoshi Nakamura ,  Hiroki Nishijima ,  Makoto Ito

IPC: G01N27/12 ,  G01N27/406 ,  G01N27/41 ,  G01M15/10 ,  G01N27/407 ,  G01N33/00 ,  G01N33/497

Abstract: A gas sensor element with suppressed response deterioration even when poisoned with S when fuel or exhaust gas contains ethanol and the ethanol content is high. The element includes a detection portion, which includes a solid electrolyte layer having a pair of electrodes on opposite sides thereof, a shielding layer defining a measurement target gas space with a porous diffusive resistance layer, and a reference gas space protective layer; a heat-generating portion stacked on the detection portion; and a porous protective layer surrounding the detection portion and heat-generating portion. The porous protective layer includes a first porous protective layer surrounding at least the porous diffusive resistance layer, and a second porous protective layer surrounding the first porous protective layer, the detection portion and the heat-generating portion. The first porous protective layer contains none of La, Ca, or Mg, while the second porous protective layer contains at least one of them.

公开(公告)号：US11530665B2

公开(公告)日：2022-12-20

申请号：US17101542

申请日：2020-11-23

Applicant: DENSO CORPORATION

Inventor： Satoshi Nakamura ,  Toshihiko Harada ,  Kensuke Takizawa ,  Eriko Maeda ,  Hiroaki Yoto

IPC: F02D41/22 ,  F01N3/20 ,  F02D41/14

Abstract: A deterioration determination apparatus is usable with an ammonia sensor that includes an ammonia element portion that includes, a solid electrolyte, an ammonia electrode, and a reference electrode. The deterioration determining apparatus compares a first evaluation value and a second evaluation value, and determines whether deterioration has occurred in the ammonia element portion of the ammonia sensor at an evaluation time or subsequent to the evaluation time. The first evaluation value is based on a first sensor current obtained when a DC voltage is applied between the ammonia electrode and the reference electrode of the ammonia element portion at an initial time that is during an initial use period of the ammonia sensor. The second evaluation value is based on a second sensor current obtained when the DC voltage is applied between the ammonia electrode and the reference electrode subsequent to the initial period of use of the ammonia sensor.