Title:
CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2015010474
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve a problem that a fuel injection amount is excessively corrected to a lean side during port wet remains immediately after air-fuel ratio rich control is finished immediately after a return from fuel cut.SOLUTION: When a rotation number of an internal combustion engine exceeds a prescribed rotation number and an accelerator operation amount goes below a prescribed threshold, a fuel cut is performed. When a prescribed fuel cut finish condition is established, control for finishing the fuel cut is performed. Immediately after a return from the fuel cut, air-fuel ratio rich control for setting an air-fuel ratio to a rich side is performed. A guide is applied to a correction coefficient at a lean side of first air-fuel ratio feedback control after the finish of the air-fuel ratio rich control, and the air-fuel ratio is controlled to the lean side while lowering a speed of an increase of a correction amount of the air-fuel ratio more than that at a normal time for a prescribed period of time.
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Inventors:
SONODA TAKESHI
YAGI TOMOHIRO
OTA KOSAKU
YAGI TOMOHIRO
OTA KOSAKU
Application Number:
JP2013134027A
Publication Date:
January 19, 2015
Filing Date:
June 26, 2013
Export Citation:
Assignee:
DAIHATSU MOTOR CO LTD
International Classes:
F02D41/14; F02D41/12
Domestic Patent References:
| JP2008202563A | 2008-09-04 | |||
| JPH1047127A | 1998-02-17 | |||
| JP2000265884A | 2000-09-26 |
Attorney, Agent or Firm:
Kazuhiro Akazawa
Takashi Miyazawa
Takashi Miyazawa
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