Air-fuel ratio control system

Details Air-fuel ratio control system Air-fuel ratio control system

1985-10-15

1987-04-07

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123438, F02M 700, F02B 300

Patent

active

046551816

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine has an electromagnetic valve for correcting the air-fuel ratio of air-fuel mixture, and an O.sub.2 sensor for detecting oxygen concentration in exhaust gases. An engine coolant temperature sensor is provided for producing an engine temperature signal when the temperature is higher than a predetermined value, and an O.sub.2 sensor condition detecting circuit is provided for producing a non-activation signal when the O.sub.2 sensor is not activated. Engine restart operation is detected by the engine temperature signal and non-activation signal. When the restarting of the engine detected, pulses with a duty ratio of which is dependent on the coolant temperature are applied to the electromagnetic valve, so as to prevent extreme enrichment of the air-fuel mixture.

REFERENCES:
patent: Re29741 (1978-08-01), Norimatsu et al.
patent: 3949551 (1976-04-01), Eichler
patent: 4040394 (1977-08-01), Wahl et al.
patent: 4109615 (1978-08-01), Asano
patent: 4375211 (1983-03-01), Ohara et al.
patent: 4398517 (1983-08-01), Kubota et al.
patent: 4476834 (1984-10-01), Nakazato
patent: 4483296 (1984-11-01), Kataoka
patent: 4542729 (1985-09-01), Yamato et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1079900