Air-fuel ratio control apparatus

Internal-combustion engines – Charge forming device – Having fluidic logic control means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

123489, 204425, F02D 4114, G01N 2758

Patent

active

049150774

ABSTRACT:
An air-fuel control apparatus comprises an air-fuel ratio sensor comprising a gap portion for introducing exhaust gas generated from an engine, a solid electrolyte oxygen pump for controlling a partial pressure of oxygen in the gap portion and a solid electrolyte oxygen sensor producing an electromotive force in response to a proportion of the partial pressure of oxygen in the gap portion and a partial pressure of oxygen in other than the gap portion. The air-fuel control apparatus is further provided with an electronic control device including a pump current stopping means which controls a pump current from the solid electrolyte oxygen pump so that the electromotive force generated by the solid electrolyte oxygen sensor is maintained at a constant value, and controls not to feed the pump current when the engine is stopped, and a control device which operates the optimum quantity of fuel supply to thereby effect an air-fuel control by a gas mixture producing mean in an operational condition that the engine is not subjected to a feed-back control on the basis of an output signal from the air-fuel ratio sensor, and controls not to feed a pump current by the actuation of the pump current stopping means when the revolution number of the engine is determined to be lower than a predetermined value, i.e. the engine is stopped in an operational condition that the engine is subjected to the feed-back control on the basis of the pump current.

REFERENCES:
patent: 4665874 (1987-05-01), Kawanabe et al.
patent: 4698209 (1987-10-01), Hashimoto et al.
patent: 4707241 (1987-11-01), Nakagawa et al.
patent: 4753203 (1988-06-01), Yamada
patent: 4762604 (1988-08-01), Asakura et al.
patent: 4765298 (1988-08-01), Kojima et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-2293069

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.