Engine air-fuel ratio control system

Details Engine air-fuel ratio control system Engine air-fuel ratio control system

2007-02-20

2007-02-20

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

C123S687000

Reexamination Certificate

active

11229574

ABSTRACT:
An engine air-fuel ratio control system is configured to use a rich air-fuel ratio immediately after starting an engine such that the air-fuel ratio converge rapidly toward a stoichiometric value and then afterwards start an air-fuel ratio feedback control. Upon determining an air-fuel ratio sensor is active, a stabilization fuel quantity increasing factor that is a component of a target air-fuel ratio revising coefficient is decreased at a higher rate than the rate used before the air-fuel ratio sensor was determined to be active. Air-fuel ratio feedback control is started when the air-fuel ratio corresponds to a stoichiometric air-fuel ratio. After starting air-fuel ratio feedback control, an unburned fuel quantity compensating value is set based on the stabilization fuel quantity increasing factor in effect at that point in time and added to the target air-fuel ratio revising coefficient while, simultaneously, the stabilization fuel quantity increasing factor is set to zero.

REFERENCES:
patent: 4669439 (1987-06-01), Mamiya et al.
patent: 5381767 (1995-01-01), Kikuchi
patent: 5887421 (1999-03-01), Mitsutani
patent: 6591822 (2003-07-01), Dohta
patent: 6644291 (2003-11-01), Stroh et al.
patent: 7047123 (2006-05-01), Katoh
patent: 2002/0005192 (2002-01-01), Dohta
patent: 2003/0172914 (2003-09-01), Stroh et al.
patent: 2005/0022504 (2005-02-01), Miura
patent: 2005/0022516 (2005-02-01), Miura
patent: 2006/0016441 (2006-01-01), Sakaguchi et al.
patent: 2006/0065257 (2006-03-01), Katoh
patent: 10101006 (2002-07-01), None
patent: 10252423 (2004-05-01), None
patent: 09-177580 (1997-07-01), None
patent: 10-110645 (1998-04-01), None

Affiliated with

Also associated with

Rating

Engine air-fuel ratio control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Engine air-fuel ratio control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine air-fuel ratio control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3870651