Title:
ガスセンサ制御装置
Document Type and Number:
Japanese Patent JP5795998
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a gas sensor control device capable of properly detecting deterioration of a detecting element of a gas sensor including an electromotive force cell and a pump cell.SOLUTION: A gas sensor control device 1 of a gas sensor 2 with a detecting element 3 including an electromotive force cell 24 and a pump cell 14 includes: current control means 69 which controls a pump current Ip so that an electromotive force cell voltage Vs becomes equal to a target voltage Vr; target voltage setting means S9, S15, and S12 which sets one of a first target voltage Vr1 and a second target voltage Vr2 as the target voltage Vr; and deterioration detection means S10, S16, and S17 which detects deterioration of the detecting element 3 by using a difference ΔRpvs between a first element resistance Rpvs1 in a state where the pump current Ip is controlled by the current control means 69 with the first target voltage Vr1 as the target voltage Vr and a second element resistance Rpvs2 in a state where the pump current Ip is controlled by the current control means 69 with the second target voltage Vr2 as the target voltage Vr.
Inventors:
Seiji Maeda
Application Number:
JP2012194430A
Publication Date:
October 14, 2015
Filing Date:
September 04, 2012
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
G01N27/26; F02D41/22; F02D45/00; G01N27/409; G01N27/416; G01N27/419
Domestic Patent References:
| JP3048148A | ||||
| JP4233447A | ||||
| JP2004258043A | ||||
| JP2009063329A |
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office
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