Title:
GAS SENSOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/221528
Kind Code:
A1
Abstract:
A gas sensor comprises: a pump cell which, by means of the application of a voltage, adjusts the oxygen concentration in a gas being detected that has been introduced into a gas chamber; a sensor cell which detects the concentration of a specific gas component in the gas chamber after the oxygen concentration has been adjusted by the pump cell; and a monitor cell which detects the residual oxygen concentration in the gas chamber. Each SCU 31-33 is provided with: a pump cell control unit (M11) which causes the pump cell to adjust the residual oxygen concentration in such a way as to control the output from the monitor cell to a target value; an acquiring unit (M12) which acquires an output from the sensor cell, in a state in which the residual oxygen concentration has been adjusted by the pump cell control unit; and a degradation determining unit (M13) which determines the state of degradation of the monitor cell on the basis of the output from the sensor cell, acquired by the acquiring unit.
Inventors:
MURAYAMA YUKI (JP)
KOYABU TADAKATSU (JP)
KAYAMA RYOZO (JP)
KOYABU TADAKATSU (JP)
KAYAMA RYOZO (JP)
Application Number:
PCT/JP2018/020595
Publication Date:
December 06, 2018
Filing Date:
May 29, 2018
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01N27/26; G01N27/416
Domestic Patent References:
| WO2016013229A1 | 2016-01-28 |
Foreign References:
| JP2015059926A | 2015-03-30 | |||
| JP2015105843A | 2015-06-08 | |||
| JP2009175013A | 2009-08-06 | |||
| JP2004333374A | 2004-11-25 | |||
| JP2003254939A | 2003-09-10 | |||
| JP2007147386A | 2007-06-14 | |||
| JP2007147383A | 2007-06-14 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
Download PDF:
Previous Patent: FUEL INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
Next Patent: LIQUID SKIN CLEANSER
Next Patent: LIQUID SKIN CLEANSER