Title:
CONTROL DEVICE FOR EXHAUST EMISSION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2017194022
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce an amount of NO generated at NSR catalyst at the time of execution of a rich spike processing as much as possible at a control device for an exhaust emission control device provided with NSR catalyst installed at an exhaust passage of an internal combustion engine.SOLUTION: A control device of this invention controls an amount of fuel supplied from a fuel supply device to NSR catalyst in such a way that when NSR temperature Tnsr belongs to a warming-up temperature range of equal to or more than an activation starting temperature of NSR catalyst and less than an activation completion temperature and further when the NSR temperature Tnsr is less than the pre-determined temperature Tthr, an air-fuel ratio of the exhaust gas flowing into NSR catalyst at the time of execution of the rich spike processing may become lower as compared with the case in which the NSR temperature Tnsr is equal to or more than the pre-determined temperature Tthr.SELECTED DRAWING: Figure 3
Inventors:
ITO KATSUHIRO
Application Number:
JP2016085173A
Publication Date:
October 26, 2017
Filing Date:
April 21, 2016
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D41/04; F01N3/08; F01N3/28
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Atsushi Kokubo
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Atsushi Kokubo