公开(公告)号：US20180328880A1

公开(公告)日：2018-11-15

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 ,  G01N27/4077

Abstract: A gas sensor S 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 are=total surface area of metal catalyst which exists on an electrode unit surface area/actual surface area of electrode per electrode unit surface area.  Equation 1:

公开(公告)号：US20180313781A1

公开(公告)日：2018-11-01

申请号：US15766485

申请日：2016-09-28

Applicant: DENSO CORPORATION

Inventor： Yoshihide SEGAWA ,  Junta ZUSHI

IPC: G01N27/41 ,  G01N27/407

CPC classification number: G01N27/4073

Abstract: A gas sensor is provided which has improved responsiveness and is capable of improving accuracy in measurement of an imbalance between cylinders. The gas sensor includes a solid electrolyte having oxygen ion conductivity, a measurement electrode mounted on one principal surface of the solid electrolyte and is exposed to measurement gas, and a reference electrode mounted on the other principal surface of the solid electrolyte and exposed to reference gas A. Interface capacitance between crystal particles constituting the solid electrolyte is not more than 150 μF. Interface resistance between the crystal particles constituting the solid electrolyte and each of the measurement electrode and the reference electrode is not more than 80 Ω. The measurement electrode has a film thickness t1 of 2 to 8 μm.