Title:
CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2015071985
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine, for suppressing the outflow of NOx.SOLUTION: The control device for the internal combustion engine performs normal operation control including first lean control to set the air-fuel ratio of exhaust gas flowing into an exhaust emission control catalyst to be a lean air-fuel ratio and first rich control to set the air-fuel ratio of exhaust gas flowing into the exhaust emission control catalyst to be a rich air-fuel ratio. During a period for the normal operation control, sequentially after finishing fuel cut control, the control device performs second rich control to set the air-fuel ratio of the exhaust gas to be a rich air-fuel ratio and second lean control to set the air-fuel ratio of the exhaust gas to be a lean air-fuel ratio. The control device performs control so that the air-fuel ratio of the exhaust gas flowing into the exhaust emission control catalyst in the second lean control is leaner than the air-fuel ratio of the exhaust gas flowing into the exhaust emission control catalyst in the first lean control.
Inventors:
FUJIWARA TAKAHIKO
NAKAGAWA NORIHISA
OKAZAKI SHUNTARO
YAMAGUCHI YUJI
NAKAGAWA NORIHISA
OKAZAKI SHUNTARO
YAMAGUCHI YUJI
Application Number:
JP2013208465A
Publication Date:
April 16, 2015
Filing Date:
October 03, 2013
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D41/14; F01N3/24; F02D41/04; F02D45/00
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Tatsuki Sone
Yuichi Morimoto
Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
Tatsuki Sone
Yuichi Morimoto