Title:
An exhaust-air-purification device of an internal-combustion engine
Document Type and Number:
Japanese Patent JP6024835
Kind Code:
B2
Abstract:
A rich control for temporarily declining an air-fuel ratio of exhaust gas discharged from an engine combustion chamber is performed by an additional fuel being injected into a cylinder in an expansion stroke or an exhaust stroke in a state where a throttle opening degree is switched from a base throttle opening degree to a throttle opening degree for the rich control and an EGR rate is switched from a base EGR rate to an EGR rate for the rich control. The rich control is terminated by returning the throttle opening degree (VTH) to the base throttle opening degree (VTHB), stopping the injection of the additional fuel (Qa), and temporarily increasing the amount of a main fuel (Qm). Then, an EGR control valve opening degree (VEGR) is controlled such that the EGR rate (REGR) is returned to the base EGR rate (REGRB).
Inventors:
Yoshito Nogi
Application Number:
JP2015553319A
Publication Date:
November 16, 2016
Filing Date:
December 20, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D45/00; F01N3/20; F01N3/28; F01N3/36; F02D9/02; F02D21/08; F02D41/04; F02D41/40; F02D43/00
Domestic Patent References:
| JP2003328733A | 2003-11-19 | |||
| JP2004245175A | 2004-09-02 | |||
| JP2006316757A | 2006-11-24 | |||
| JP2013127262A | 2013-06-27 |
Foreign References:
| WO2011118044A1 | 2011-09-29 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Yuichi Morimoto
Koichi Ito
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Yuichi Morimoto
Koichi Ito
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