公开(公告)号：US20170363570A1

公开(公告)日：2017-12-21

申请号：US15535865

申请日：2015-12-17

Applicant: DENSO CORPORATION

Inventor： Kei SUGIURA

IPC: G01N27/407 ,  G01N27/41

Abstract: A gas sensor having a reliable measurement accuracy for specific gases even if a pump electrode is heated and a method for manufacturing the same are provided. The gas sensor is provided with a measurement target gas chamber, a reference gas chamber, a solid electrolyte, a pump electrode, a sensor electrode, a reference electrode and a heater. The pump electrode includes Pt, Au and an aggregate. After the gas sensor has been manufactured, in a state that the pump electrode has not been heated to an activation temperature of the solid electrolyte yet, in the pump electrode, a pore is 5.2 vol % or less, a surface roughness Ra is 0.5 μm to 9.1 μm, and a content ratio of the aggregate 31 is 4.9 vol % or more.

公开(公告)号：US20240199466A1

公开(公告)日：2024-06-20

申请号：US18592819

申请日：2024-03-01

Applicant: DENSO CORPORATION

Inventor： Eriko MAEDA ,  Kei SUGIURA

IPC: C02F9/00 ,  B01D3/14 ,  B01D61/02 ,  B01D61/36 ,  B01D61/58 ,  B01D71/02 ,  C02F1/04 ,  C02F1/44 ,  C02F103/34

CPC classification number: C02F9/00 ,  B01D3/145 ,  B01D61/58 ,  B01D71/02 ,  B01D61/025 ,  B01D61/364 ,  B01D2311/08 ,  B01D2317/022 ,  C02F1/04 ,  C02F1/441 ,  C02F1/447 ,  C02F2103/34 ,  C02F2303/10

Abstract: A water treatment system includes a reverse-osmosis membrane separation device and a ceramic membrane separation device. The reverse-osmosis membrane separation device separates treatment water into first concentrated water and first purified water by a reverse osmosis membrane. The ceramic membrane separation device includes a ceramic membrane having a porosity permeable to water vapor and impermeable to liquid water, and the ceramic membrane separation device separates the first concentrated water into second concentrated water and second purified water.

公开(公告)号：US20230176005A1

公开(公告)日：2023-06-08

申请号：US18161449

申请日：2023-01-30

Applicant: DENSO CORPORATION

Inventor： Go MIYAGAWA ,  Kazuki YAGI ,  Kei SUGIURA

IPC: G01N27/406 ,  G01N27/409 ,  G01N27/419

CPC classification number: G01N27/4067 ,  G01N27/409 ,  G01N27/419 ,  G01N27/41

Abstract: The sensor control unit is used for a gas sensor disposed in an exhaust pipe in an engine as an internal combustion engine of a vehicle. The gas sensor includes a sensor cell having an exhaust gas electrode, an atmosphere side electrode and a solid electrolyte, and a heater that heats the sensor cell. The sensor control unit includes a heater control unit that controls a heater to heat a sensor cell. The heater control unit heats the sensor cell to be at an operation control temperature during the combustion operation of the engine and heats the sensor cell to be at an operation stop control temperature which is higher than the operation control temperature.

公开(公告)号：US20220373504A1

公开(公告)日：2022-11-24

申请号：US17880995

申请日：2022-08-04

Applicant: DENSO CORPORATION

Inventor： Kei SUGIURA ,  Makoto NOGUCHI

IPC: G01N27/407 ,  G01N27/406

Abstract: A laminated gas sensor element is provided by laminating a plurality of ceramic layers. The gas sensor element includes: a solid electrolyte body having oxygen ion conductivity; a measurement electrode provided on a first principal surface of the solid electrolyte body; a reference electrode provided on a second principal surface of the solid electrolyte body; a chamber facing the measurement electrode and into which a measured gas is introduced; and a heater heating the solid electrolyte body. The chamber comprises at least one projecting corner portion, the at least one projecting corner portion projecting, on a cross section perpendicular to a longitudinal direction of the gas sensor element, in a width direction perpendicular to both of the longitudinal direction and a laminating direction. A tip of the projecting corner portion is disposed on a side closer to the heater than a center of the chamber in the laminating direction is.

公开(公告)号：US20220018803A1

公开(公告)日：2022-01-20

申请号：US17485904

申请日：2021-09-27

Applicant: DENSO CORPORATION

Inventor： Kei SUGIURA ,  Toru TAKEUCHI

IPC: G01N27/407 ,  G01N27/406 ,  G01N27/409 ,  B01D53/02

Abstract: A gas sensor includes a sensor element that has an atmospheric-air introduction path into which atmospheric air is introduced. The sensor element includes a solid electrolyte body, an insulating body, an exhaust electrode, and an atmosphere electrode. The solid electrolyte body has ion conductivity. The insulating body is laminated onto the solid electrolyte body. The exhaust electrode is provided in the solid electrolyte body and exposed to an exhaust gas. The atmosphere electrode is provided in a position that opposes the exhaust electrode in the solid electrolyte body. The atmosphere electrode is used so as to be paired with the exhaust electrode, and is exposed to atmospheric air. The atmospheric-air introduction path is formed to house the atmosphere electrode in a section of the insulating body that opposes the solid electrolyte body. The atmospheric-air introduction path is provided with a trap layer for capturing toxic substances in the sensor element.

公开(公告)号：US20190242848A1

公开(公告)日：2019-08-08

申请号：US16256680

申请日：2019-01-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Hiroki NISHIJIMA ,  Yoshiharu MIYAKE ,  Haruki KONDO ,  Yasushi HIRATA ,  Hirofumi SUZUKI ,  Kei SUGIURA ,  Toru TAKEUCHI

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

CPC classification number: G01N27/4077 ,  G01N27/4067 ,  G01N27/4071 ,  G01N27/4075 ,  G01N27/409

Abstract: The present disclosure provides a gas sensor element comprising a porous protective layer with improved water repellency upon continuously water pouring, which is a gas sensor element comprising: a detection portion; and a porous protective layer formed around the detection portion, wherein the porous protective layer is formed from an aggregate containing alumina and a coating material containing silica, and in the porous protective layer, the weight concentration x % by weight of the coating material with respect to the total weight of the aggregate and the coating material, and the porosity y %, satisfy the following formula (1): y≤0.0058x2-1.2666x+68  (1), and in the porous protective layer, the pore volume of pores having a pore diameter of 100 nm or less is 0.02 mL/g or less.

公开(公告)号：US20170261463A1

公开(公告)日：2017-09-14

申请号：US15509327

申请日：2015-09-11

Applicant: DENSO CORPORATION

Inventor： Kei SUGIURA ,  Yoshiyasu ANDO

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

CPC classification number: G01N27/4074 ,  G01N27/4071 ,  G01N27/4072 ,  G01N27/41 ,  G01N33/0037 ,  Y02A50/245

Abstract: In a gas sensor where an exhaust gas is introduced into a chamber provided in a gas sensor element so that an oxygen concentration is reduced in a pump cell on the upstream side to detect NOx in the exhaust gas in a sensor cell on the downstream side, the surface of at least one of a solid electrolyte sheet and a shielding sheet that constitute wall surfaces of the chamber has a warped shape which is convex inwardly of the chamber at a position where the pump cell is formed. The warp amount is in the range from 0.10% or higher to 1.38% or lower, and the height in the stacking direction of the diffusion layer is lower than the average height Have in the stacking direction of the chamber at the position where the pump cell is formed.