Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Nagoya University

So-ken Corporation

Shinya Teranishi

Keigo Mizutani

Keiichiro Aoki

Kazuhiro Wakao

Katsuhide Akimoto

Shoichiro Emmei

Satoshi Hada

Satoshi Nakamura

Tatsuhiro Hashida

Tetsuya Kato

Toyoharu Kaneko

Hiroaki Yoto

Hiroo Imamura

Toshihiko Harada

Ryohei Yamamoto

Noriaki Kihara

Takashi Hibino

Masahiro Nagao

Ikuna Nishikawa

Tetsuya Hori

Tekehito Kimata

Mai Fukui

An electrochemical device has an electrochemical cell provided with an electrolyte having proton conductivity, an anode provided on one side of the electrolyte, and a cathode provided on the other side of the electrolyte. The electrochemical device is configured so that a solution containing water, an artificial synthetic resin, and an acid is supplied to the anode. The electrochemical device is configured so that an oxygen-containing gas is supplied to the cathode and connecting a load between the anode and the cathode. The electrochemical device is configured so that the inert gas is supplied to the cathode and connecting the voltage application unit between the anode and the cathode.

Electrochemical device

Disclosed is an ammonia sensor element having a measured gas chamber, a reference gas chamber and a solid electrolyte body arranged therebetween. The solid electrolyte body has a first main surface facing the measured gas chamber and a second main surface facing the reference gas chamber. A detection electrode is formed on the first main surface. A reference electrode is formed on the second main surface. The solid electrolyte body contains a first proton conducting solid electrolyte. The detection electrode contains a second proton conducting solid electrolyte. The second proton conducting solid electrolyte has an acid strength greater than that of the first proton conducting solid electrolyte.

Ammonia sensor element

To provide an SOx concentration detection device that can detect the SOx concentration in exhaust gas without using a dedicated sensor. As shown in FIG., the current value that flows when a voltage in the limiting current region is applied stays at a constant value (limiting current value) regardless of the elapsed time. On the other hand, the current value that flows when a voltage in the overcurrent region is applied decreases with the lapse of time and approaches the limiting current value 30 seconds after the start of application of the voltage. In this embodiment, the current value difference is defined as 'SOreduction current,' and the SOconcentration around the sensor is detected from an integrated value of the SOreduction current.

SOx concentration detection device

The object of the invention is to detect a concentration of a SOx included in an exhaust gas of an internal combustion engine easily and accurately by a limiting current type sensor. The invention relates to a SOx concentration detection device of the engine having a limiting current type sensor. The device of the invention comprises a detecting part for detecting the concentration of the SOx included in the exhaust gas by using an output current of the sensor while lowering a voltage applied to the sensor from a predetermined voltage.

[object Object]

The particulate matter detection element is constituted of a laminated body including first and second electrode layers each having a plate-like shape and a thickness between 50 &#x3bc;m and 500 &#x3bc;m laminated on each other through an intermediate insulating layer having a plate-like shape and a thickness between 3 &#x3bc;m and 20 &#x3bc;m. A cross-sectional surface of the laminated body in the lamination direction is used as a detection surface of the particulate matter detection element.

Particulate matter detection element and method of manufacturing same

A gas sensing element is disclosed as having a measuring gas chamber to which measuring gases are admitted, a diffusion resistance portion for introducing measuring gases to the measuring gas chamber under diffusion resistance, a sensor cell for detecting a specified gas concentration of measuring gases, and an oxygen pump cell for adjusting an oxygen concentration in the measuring gases. The sensor cell includes a measuring electrode, placed facing the measuring gas chamber, and a reference electrode formed in pair with the measuring electrode. The oxygen pump cell includes an inner pump electrode placed facing the measuring gas chamber, and an outer pump electrode formed in pair with the inner pump electrode. The diffusion resistance portion is placed in an area inside of external end walls of the inner pump electrode to be exposed to the measuring gas chamber.

Gas sensing element with increased response

A gas sensor control device is disclosed as including a sensor cell having a negative terminal, to which a current-voltage converter is connected, and a differential amplifier is connected to the current-voltage converter to provide a current measured result applied to a microcomputer. The current-voltage converter has an opposite-to-sensor terminal to which another differential amplifier is connected. A sensor-side terminal of the current-voltage converter and another differential amplifier is electrically connected to each other via an electric pathway having a sensor-current flow disabling pathway in which a switch circuit is provided. Closing the switch circuit allows a potential difference between both terminals of the current-voltage converter is zeroed. With the switch circuit closed, the microcomputer calculates an element current correcting value, while detecting an electromotive force of the sensor cell based on which a failure is determined.

Gas sensor control device

Growing community of inventors

Aichi-ken, Japan

Shinya Teranishi