Title:
An element impedance detecting device of an oxygen concentration sensor
Document Type and Number:
Japanese Patent JP5979165
Kind Code:
B2
Abstract:
An impedance detector includes a current application portion, a detection portion, a calculation portion and a changing portion. The current application portion applies an impedance detection current for detecting an impedance of an element of an oxygen sensor to the element. The detection portion detects a difference between a current application prior voltage and a current application subsequent voltage of the element. The calculation portion calculates the impedance of the element based on the difference detected by the detection portion and a value of the impedance detection current applied by the current application portion. The current application portion can change the value of the impedance detection current applied to the element. The changing portion determines to change the value of the impedance detection current according to the difference detected by the detection portion.
Inventors:
Uemura Shinya
Application Number:
JP2014020322A
Publication Date:
August 24, 2016
Filing Date:
February 05, 2014
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01N27/41; G01N27/409; G01N27/419
Domestic Patent References:
| JP10048180A | ||||
| JP2002005882A | ||||
| JP11201935A | ||||
| JP2005147872A | ||||
| JP2004503772A |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation