Air/fuel ratio control device for internal combustion engine

Details Air/fuel ratio control device for internal combustion engine Air/fuel ratio control device for internal combustion engine

2007-09-18

2007-09-18

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C701S103000, C701S109000

Reexamination Certificate

active

10554025

ABSTRACT:
An air-fuel ratio control apparatus for an internal combustion engine, implementing integral correction of the air-fuel ratio by an integral term edfii obtained by multiplying an integrated difference between a target air fuel ratio and the actual air-fuel ratio by an integral gain, wherein the upper and lower limit values of the integral term are set based on the actual intake air amount and the actual air-fuel ratio. This limits the range of the integral term edfii to prevent it from being set at an excessively high or low level removed from the realities of the intake air amount and the air-fuel ratio, and thereby to prevent erroneous air-fuel ratio correction by the integral term.

REFERENCES:
patent: 4461261 (1984-07-01), Isomura et al.
patent: 5775311 (1998-07-01), Kato et al.
patent: 5884613 (1999-03-01), Kitamura et al.
patent: 6019093 (2000-02-01), Kitagawa
patent: 6233922 (2001-05-01), Maloney
patent: 6698186 (2004-03-01), Ueno et al.
patent: 6898508 (2005-05-01), Nakano et al.
patent: 7069910 (2006-07-01), Surnilla et al.
patent: 7162359 (2007-01-01), Yasui
patent: 2002/0104310 (2002-08-01), Ikemoto et al.
patent: 198 47 447 (2000-04-01), None
patent: 09-280038 (1997-10-01), None
patent: 2001-349235 (2001-12-01), None
patent: 2002-30964 (2002-01-01), None
patent: 2002-106374 (2002-04-01), None
patent: A 2002-106374 (2002-04-01), None
patent: 2002-227689 (2002-08-01), None

Affiliated with

Also associated with

Rating

Air/fuel ratio control device 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 control device 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 control device for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3758163