公开(公告)号：US20180238826A1

公开(公告)日：2018-08-23

申请号：US15754373

申请日：2016-08-29

Applicant: DENSO CORPORATION

Inventor： Tatsuki UJIYAMA ,  Yasufumi SUZUKI

IPC: G01N27/409 ,  G01N27/407 ,  F01N11/00 ,  F01N3/24

CPC classification number: G01N27/409 ,  F01N3/24 ,  F01N11/007 ,  G01N27/4073

Abstract: An A/F sensor includes a solid electrolyte body and a heater. The A/F sensor is disposed downstream of a purification device in a flow of exhaust gas g. The purification device purifies the exhaust gas g. The solid electrolyte body is in a cup shape. The solid electrolyte body has an outer surface provided with a measurement electrode 4 contacting the exhaust gas g, and an inner surface provided with a reference electrode contacting reference gas. The solid electrolyte body is made of zirconia. The solid electrolyte body includes a detection part sandwiched between the measurement electrode and the reference electrode and conducted with oxygen ions. The detection part has a cubic phase ratio of 88 mol % or more.

公开(公告)号：US20200057018A1

公开(公告)日：2020-02-20

申请号：US16663516

申请日：2019-10-25

Applicant: DENSO CORPORATION

Inventor： Yasutaka KAMIYA ,  Tatsuki UJIYAMA

IPC: G01N27/407

Abstract: A gas sensor includes a gas sensor element for detecting a specific gas concentration in measured gas. The gas sensor element includes a solid electrolyte, a measured gas side electrode into which measured gas is introduced through a porous diffusion resistance layer, a reference gas side electrode facing a reference gas chamber, and a diffusion space portion between the porous diffusion resistance layer and the measured gas side electrode. The porous diffusion resistance layer has a measured gas inlet opened to an element outer surface and a measured gas outlet opened to the diffusion space portion. A relationship between a distance between the inlet and the outlet and a distance between the outlet and the measured gas side electrode is expressed by 0