Air-fuel ratio control system

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

1982-02-17

1984-10-09

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

F02M 720

Patent

active

044755120

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine comprises an exhaust passage, a carburetor, an on-off type electromagnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied to the cylinder and an O.sub.2 -sensor for detecting the oxygen concentration of the exhaust gases, a catalytic converter provided in the exhaust passage, and a feedback control circuit responsive to the output of the O.sub.2 -sensor for producing pulses for driving the electromagnetic valve for correcting the air-fuel ratio. The O.sub.2 -sensor is provided at a position downstream of the catalytic converter such that the volume of the exhaust passage from an inlet of the exhaust passage to the position is substantially twice as much as the volume from the inlet to an inlet of the catalytic converter. The feedback control circuit comprises a differentiating circuit for differentiating the output of the O.sub.2 sensor and a microcomputer. The microcomputer operates in dependency on the output of the differentiating circuit for driving the on-off type electromagnetic valve.

REFERENCES:
patent: 4136645 (1979-01-01), Ito et al.
patent: 4320731 (1982-03-01), Braun et al.
patent: 4364356 (1982-12-01), Gerhold
patent: 4378773 (1983-04-01), Ohgami

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-1594891