Title:
INTERNAL COMBUSTION ENGINE CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP2015194130
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To ensure the early recovery of a catalyst from HC poisoning.SOLUTION: An internal combustion engine control system comprises an exhaust emission control catalyst that includes a lower catalyst layer and an upper catalyst layer disposed above the lower catalyst layer and that is provided in an exhaust passage of an internal combustion engine, switches an air-fuel ratio of exhaust gas to a lean target air-fuel ratio through a first operation for temporarily setting the air-fuel ratio of the exhaust gas to a lean air-fuel ratio and a second operation executed after the first operation for changing the air-fuel ratio of the exhaust gas alternately to a rich air-fuel ratio and the lean air-fuel ratio a plurality of times in a case of switching an operation at the rich air-fuel ratio to an operation at the lean target air-fuel ratio.
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Inventors:
TANAKA TAKAYOSHI
MASUBUCHI MASAHIKO
MASUBUCHI MASAHIKO
Application Number:
JP2014072498A
Publication Date:
November 05, 2015
Filing Date:
March 31, 2014
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01N3/20; B01D53/94; F01N3/28; F01N3/36; F02D13/06; F02D41/04; F02D45/00
Domestic Patent References:
| JP2010022918A | 2010-02-04 | |||
| JP2009165929A | 2009-07-30 | |||
| JP2006297372A | 2006-11-02 |
Foreign References:
| DE10202935A1 | 2003-08-21 |
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita
Kazunobu Sera
Akira Hirakawa
Takehiko Sekine
Katsuhiko Imahori
Fuminori Miyashita