Title:
GAS SENSOR ELEMENT
Document Type and Number:
WIPO Patent Application WO/2015/186776
Kind Code:
A1
Abstract:
A gas sensor element is provided with a pump cell for adjusting an oxygen concentration in a gas space to be measured and a sensor cell for measuring the oxygen ion current flowing between a sensor electrode and a reference electrode. The gas sensor element subtracts, from an oxygen ion current value (I1) measured by the sensor cell when fuel is injected in an internal combustion engine, an oxygen ion current value (I2) measured by the sensor cell after a prescribed amount of time has passed from the time when the injection of fuel in the internal combustion engine was cut off and detects the concentration of a prescribed gas component on the basis of the resulting corrected oxygen ion current value (I). As a result, the detection accuracy of the concentration of a prescribed gas component is enhanced.
Inventors:
ARAKI TAKASHI (JP)
MIZUTANI KEIGO (JP)
MIZUTANI KEIGO (JP)
Application Number:
PCT/JP2015/066161
Publication Date:
December 10, 2015
Filing Date:
June 04, 2015
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01N27/416; G01N27/41
Foreign References:
| JP2011058834A | 2011-03-24 | |||
| JP2009150719A | 2009-07-09 | |||
| JP2003149199A | 2003-05-21 | |||
| JP2000321238A | 2000-11-24 | |||
| JPH09113484A | 1997-05-02 | |||
| JP2004108788A | 2004-04-08 | |||
| JP2006267127A | 2006-10-05 | |||
| JP2005061884A | 2005-03-10 |
Attorney, Agent or Firm:
KIKUCHI, YASUHIRO (JP)
Yasuhiro Kikuchi (JP)
Yasuhiro Kikuchi (JP)
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