公开(公告)号：US20220390410A1

公开(公告)日：2022-12-08

申请号：US17888671

申请日：2022-08-16

Applicant: DENSO CORPORATION

Inventor： Tomofumi FUJII ,  Makoto NOGUCHI

IPC: G01N27/406 ,  G01N27/41 ,  G01N27/417 ,  G01N27/407

Abstract: A limiting current-type gas sensor element including a plurality of stacked ceramic layers and configured to output a limiting current value which depends on a concentration of a specific gas in a gas to be measured when a certain voltage is applied. The gas sensor element includes a solid electrolyte member having oxygen ion conductivity; a heater that heats the solid electrolyte member; a measurement electrode and a reference electrode provided on the solid electrolyte member; a chamber facing the measurement electrode and into which the gas to be measured is introduced; a gas inlet located to a tip side of the chamber in a longitudinal direction; and a diffusion resistance part provided in the gas inlet. A heating center of the heater is located further to the tip side than an electrode center of the measurement electrode is.

公开(公告)号：US20230152270A1

公开(公告)日：2023-05-18

申请号：US18153880

申请日：2023-01-12

Applicant: DENSO CORPORATION

Inventor： Kouji MORITA ,  Masato OZAWA ,  Tomofumi FUJII

IPC: G01N27/407 ,  G01M15/10

CPC classification number: G01N27/4078 ,  G01M15/102

Abstract: A gas sensor is provided with a housing provided with a locking step part formed on an inner peripheral surface thereof; a sensor body provided with a locked flange part locked to the locking step part from a base end side thereof and supported inside the housing; a sealing member filled into a filling part between the inner peripheral surface of the housing and an outer peripheral surface of the sensor body in a base end side of the locked flange part; and an insulation member provided between the inner peripheral surface of the housing and the outer peripheral surface of the sensor body in a base end side of the sealing member. The filling part includes an annular groove protruding in an outer peripheral side.

公开(公告)号：US20160123922A1

公开(公告)日：2016-05-05

申请号：US14896100

申请日：2014-06-04

Applicant: DENSO CORPORATION

Inventor： Katsuhide AKIMOTO ,  Shuuichi NAKANO ,  Yushi FUKUDA ,  Tomofumi FUJII ,  Takahito MASUKO ,  Toshihide KUMAZAKI

IPC: G01N27/416 ,  G01N27/406 ,  G01N27/41

CPC classification number: G01N27/4163 ,  F02D41/1454 ,  F02D41/222 ,  G01N27/4065 ,  G01N27/41 ,  G01N27/4175 ,  Y02T10/40

Abstract: A sensor element of an A/F sensor AS has a solid electrolyte layer, a first electrode arranged on one side of the solid electrolyte layer so as to be exposed to the exhaust gas of an internal combustion engine, and a second electrode arranged on the other side of the solid electrolyte layer so as to face an atmospheric air chamber. The sensor element generates a sensor output according to the oxygen concentration in the exhaust gas. A microcomputer supplies oxygen to the first electrode side from the second electrode side via the solid electrolyte layer by applying a predetermined voltage between the pair of electrodes and of the sensor element. Moreover, the microcomputer determines a crack abnormality of the solid electrolyte layer based on electric current between the pair of electrodes which is generated with start of the oxygen supply.

Abstract translation: A / F传感器AS的传感器元件具有固体电解质层，布置在固体电解质层的一侧以暴露于内燃机的废气的第一电极和布置在该固体电解质层上的第二电极 固体电解质层的另一侧面向大气空气室。 传感器元件根据废气中的氧气浓度产生传感器输出。 微型计算机通过在一对电极和传感器元件之间施加预定电压，经由固体电解质层从第二电极侧向第一电极侧提供氧。 此外，微计算机基于在氧供应开始时产生的一对电极之间的电流来确定固体电解质层的裂纹异常。