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Title:
内燃機関の排出ガス浄化装置
Document Type and Number:
Japanese Patent JP5867357
Kind Code:
B2
Abstract:
In a system having an oxygen sensor arranged downstream of a NOx storage-reduction catalyst, a constant current is made to flow between sensor electrodes by a constant current circuit provided in the outside of the oxygen sensor, which makes it possible to change an output characteristic of the oxygen sensor. Further, during a lean combustion control of an engine, a sensing responsiveness to a lean component of the oxygen sensor is improved. In this way, when NOx (lean component) is emitted to the downstream of the catalyst, the NOx can be quickly sensed by the oxygen sensor. Meanwhile, during a rich combustion control of the engine, the sensing responsiveness to a rich component of the oxygen sensor is improved. In this way, when HC and CO (rich components) are emitted to the downstream of the catalyst, the HC and the CO can be quickly sensed by the oxygen sensor.

Inventors:
Matsuoka Mikiyasu
Shingo Nakata
Masahiro Yokoi
Application Number:
JP2012221944A
Publication Date:
February 24, 2016
Filing Date:
October 04, 2012
Export Citation:
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Assignee:
株式会社デンソー
International Classes:
F01N3/00; F01N3/08; F01N9/00; F02D41/14; F02D45/00; G01N27/409
Domestic Patent References:
JP3997599B2
JP61118653A
JP820414B2
JP5689051A
JP2005351096A
JP57200641A
JP61104137A
Attorney, Agent or Firm:
Muneo Kako