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Sensors and Actuators B-chemical | 1993

Platinum-stabilized zirconia composite solid oxide oxygen gas sensor

Osamu Yamamoto; Yoshiki Chujyo; Keiichiro Aoki; Tooru Furuichi

Abstract The cathodic behavior of the sputtered platinum and 4 mol% Y 2 O 3 ZrO 2 (4YSZ) composite electrode on 4YSZ was investigated by means of d.c. measurements in the temperature range 450–800 °C and in an oxygen partial pressure range of 0.5 to 10 -4 atm. The cathodic process was influenced by the thickness of the sputtered 4YSZ on the Pt film. The lowest cathode overpotential was found in the thickness of around 0.4 μm under low and high oxygen partial pressures. The composite electrodes showed no platinum particle coarsening and no electrode deterioration after firing in air at 900 °C for 400 h.


Archive | 2005

FUEL INJECTION AMOUNT CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE

Keiichiro Aoki


Archive | 2008

Air-fuel ratio control apparatus and method for an internal combustion engine

Yusuke Suzuki; Yasushi Iwazaki; Toru Kidokoro; Hiroshi Sawada; Fumihiko Nakamura; Keiichiro Aoki


Archive | 1996

A heater controller for an air-fuel ratio sensor

Keiichiro Aoki


Archive | 2009

Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine

Yasushi Iwazaki; Hiroshi Sawada; Hiroshi Miyamoto; Fumihiko Nakamura; Keiichiro Aoki


Archive | 1997

Device for controlling knocking in an internal combustion engine

Keiichiro Aoki; Kazuhisa Mogi; Koichi Nakata; Yasuo Ito; Youichi Kurebayashi


Archive | 1997

Controller for a heater for an air-fuel ratio sensor and a method thereof

Keiichiro Aoki


Archive | 2009

AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR AN INTERNAL COMBUSTION ENGINE

Yasushi Iwazaki; Hiroshi Miyamoto; Hiroshi Sawada; Keiichiro Aoki


Archive | 2004

Control device for exhaust gas sensor of internal combustion engine

Keiichiro Aoki; Yusuke Suzuki; Yoshihiro Sakayanagi


Archive | 2009

Control system for an exhaust gas sensor

Keiichiro Aoki

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