Title:
AIR-FUEL RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2001107779
Kind Code:
A
Abstract:
To provide the air-fuel control device for an internal combustion engine which can improve the emission at the air-fuel ratio shift time.
When an air-fuel ratio learning value reaches upper/lower limits (S202), the air-fuel ratio feedback correction value (S203) at this time is measured for a certain time (S205) and by enlarging (S207, S208) the upper/lower limits of the air-fuel ration learning value by its shift amount (S206), the emission at the air-fuel ration shift time can be improved, in the air-fuel ratio control device of an internal combustion engine.
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Inventors:
SUGIYAMA TAKAYUKI
ADACHI MAKOTO
ADACHI MAKOTO
Application Number:
JP28714399A
Publication Date:
April 17, 2001
Filing Date:
October 07, 1999
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D41/02; F02D41/04; F02D41/06; F02D41/12; F02D41/14; (IPC1-7): F02D41/14