Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-03-11
1996-01-16
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
F02D 4114
Patent
active
054839459
ABSTRACT:
A learning control system for controlling an air fuel ratio an engine employs a slowly updated second learning control variable in addition to a normally updated first learning control variable in order to utilize the learning function sufficiently even when a deviation of the air fuel ratio exceeds the learning range of the first variable. The control system according to an illustrated embodiment of the invention identifies a current engine operating area among a plurality of such areas, in accordance with a sensed engine operating condition, obtains a value of the first learning variable corresponding to the identified operating area, and a value of the second learning variable, determines a learning quantity which is a sum of the first and second learning variables by using the obtained values, and uses this learning quantity for determining a desired fuel supply quantity. The second learning variable is updated slowly whereas the first learning variable is updated in a sensitive and speedy manner.
REFERENCES:
patent: 4800857 (1989-01-01), Tomisawa
patent: 4870938 (1989-10-01), Nakaniwa
patent: 5003955 (1991-04-01), Haraguchi et al.
patent: 5243951 (1993-09-01), Nakaniwa
patent: 5297046 (1994-03-01), Nakaniwa
patent: 5320080 (1994-06-01), Kadowaki
"Jidosha Kogaku (Automotive Engineering)", Jul. 1991, pp. 72-74.
Kawamura Katsuhiko
Kishimoto Youichi
Kobayashi Masato
Matsuno Osamu
Nissan Motor Co,. Ltd.
Wolfe Willis R.
LandOfFree
Air/fuel ratio control system for 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 system for engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air/fuel ratio control system for engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-302922