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

2008-04-15

2008-04-15

Argenbright, T. M (Department: 3747)

Power plants

Internal combustion engine with treatment or handling of...

Methods

C060S276000, C123S673000, C701S109000

Reexamination Certificate

active

07356985

ABSTRACT:
A target air-fuel ratio setting part has a sub-feedback part, a target air-fuel ratio enriching part, and a target air-fuel ratio changeover part. The sub-feedback part variably sets a target air-fuel ratio upstream of a catalyst on the basis of a detection signal of an O2 sensor provided downstream of the catalyst. The target air-fuel ratio changeover part uses, as the target air-fuel ratio, a rich target air-fuel ratio which is set by the target air-fuel ratio enriching part on conditions such that the target air-fuel ratio set by the sub-feedback part is rich. A cylinder-by-cylinder air-fuel ratio estimation part calculates a cylinder-by-cylinder air-fuel ratio on the basis of a detection value of an air-fuel ratio sensor and the target air-fuel ratio.

REFERENCES:
patent: 5657736 (1997-08-01), Maki et al.
patent: 5730111 (1998-03-01), Kaji et al.
patent: 6029641 (2000-02-01), Suzuki et al.
patent: 7063080 (2006-06-01), Kita et al.
patent: 7195008 (2007-03-01), Annoura et al.
patent: 2005/0022797 (2005-02-01), Ikemoto et al.
patent: 10 2004 026 176 (2005-08-01), None
patent: 3-37020 (1991-06-01), None
patent: 10-9038 (1998-01-01), None
patent: 11-200926 (1999-07-01), None
patent: 2005-42676 (2005-02-01), None

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-2792428