Air/fuel ratio control system for an internal combustion engine

Details Air/fuel ratio control system for an internal combustion engine Air/fuel ratio control system for an internal combustion engine

1986-09-10

1988-03-22

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123589, F02B 300

Patent

active

047321270

ABSTRACT:
An air/fuel ratio control system for an internal combustion engine having an air supply system for controlling the air/fuel ratio of mixture to be supplied to the engine, and an oxygen concentration sensing device for sensing the oxygen concentration in the exhaust gas of the internal combustion engine. The oxygen concentration sensing device includes a pair of solid electrolyte members operating as an oxygen pump element to which a pump current is supplied, and a sensor cell element. An open/close valve is provided in the air supply system and controlled by a duty ratio control circuit which causes the open/close valve to be opened for a calculated valve open time period in each of successive predetermined cycles in response to a result of detection of air/fuel ratio. When the calculated valve open time period exceeds a predetermined upper limit, the supply of the pump current is stopped so that the blackening phenomenon of the solid electrolyte members is avoided.

REFERENCES:
patent: 4354468 (1982-10-01), Sone
patent: 4363306 (1982-12-01), Sone
patent: 4365604 (1982-12-01), Sone
patent: 4538575 (1985-09-01), Chujo
patent: 4563991 (1986-01-01), Akatsuka
patent: 4566419 (1986-01-01), Ninomiya
patent: 4611562 (1986-09-01), Nakano

Affiliated with

Also associated with

Rating

Air/fuel ratio control system for an internal combustion 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 an internal combustion 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 an internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-436398