Air-fuel ratio controller for internal combustion engine

Details Air-fuel ratio controller for internal combustion engine Air-fuel ratio controller for internal combustion engine

2011-07-26

2011-07-26

Kwon, John T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S109000, C701S114000, C701S115000

Reexamination Certificate

active

07987039

ABSTRACT:
In a system where an air-fuel ratio feedback correction amount is learned when its variation width is within a stable determination value, the stable determination value is set at larger value when a deviation amount of the correction amount becomes larger. When the air-fuel ratio feedback correction amount is rapidly changed after the learning is completed, the stable determination value is increased to moderate the learning condition and accelerate the learning speed (update speed of the learning value). Hence, the air-fuel ratio feedback correction amount is immediately learned. Furthermore, when a behavior of the air-fuel ratio feedback correction amount is stable, the stable determination value is made small to avoid an erroneous learning of the air-fuel ratio feedback correction amount.

REFERENCES:
patent: 4633840 (1987-01-01), Saito et al.
patent: 5634454 (1997-06-01), Fujita
patent: 6324893 (2001-12-01), Watanabe et al.
patent: 7270119 (2007-09-01), Mitsutani
patent: 2004/0209734 (2004-10-01), Mitsutani
patent: 2010/0070159 (2010-03-01), Iwahashi et al.
patent: 61-28739 (1986-02-01), None
patent: 3-222841 (1991-10-01), None
patent: 4-175435 (1992-06-01), None
patent: 8-246926 (1996-09-01), None
patent: 9-42025 (1997-02-01), None
patent: 2000-104600 (2000-04-01), None
Office Action (2 pgs.) dated Jan. 11, 2011 issued in corresponding Japanese Application No. 2007-198323 with an at least partial English-language translation thereof (2 pgs.).

Affiliated with

Also associated with

Rating

Air-fuel ratio controller for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air-fuel ratio controller for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air-fuel ratio controller for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2620534