Internal-combustion engines – Charge forming device – Including cylinder pressure or temperature responsive means
Reexamination Certificate
2008-05-27
2008-05-27
Argenbright, T. M. (Department: 3747)
Internal-combustion engines
Charge forming device
Including cylinder pressure or temperature responsive means
C123S478000, C123S673000, C701S104000
Reexamination Certificate
active
07377262
ABSTRACT:
An air-fuel ratio controlling apparatus includes an internal pressure detector for detecting an internal pressure of a combustion chamber of the engine. The apparatus estimates a motoring pressure of the engine and determines a start-of-combustion time, a time point when a difference between the internal pressure and the motoring pressure exceeds a predetermined value in a compression stroke and a combustion stroke of the engine. Firing delay for each cylinder is calculated from as a duration from sparking to the start-of-combustion time. Air-fuel ratio of each cylinder is estimated based on the firing delay and fuel injection amount for each cylinder is calculated to make the air-fuel ratio of plural cylinders uniform.
REFERENCES:
patent: 6742492 (2004-06-01), Kimura
patent: 7178507 (2007-02-01), Gangopadhyay
patent: 02-099745 (1990-04-01), None
Akazaki Shusuke
Oki Hideyuki
Yamamoto Yuji
Arent & Fox LLP
Argenbright T. M.
Honda Motor Co. Ltd.
LandOfFree
Air-fuel ratio controlling apparatus for an 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 controlling apparatus for an engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air-fuel ratio controlling apparatus for an engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2751521