Closed loop air/fuel ratio controller with asymmetrical proporti

Details Closed loop air/fuel ratio controller with asymmetrical proporti Closed loop air/fuel ratio controller with asymmetrical proporti

1978-11-17

1980-10-21

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, F02M 700, F02B 300

Patent

active

042287758

ABSTRACT:
A closed loop air/fuel ratio controller for an internal combustion engine includes a control circuit responsive to the output of an exhaust gas sensor representing at least the sense of deviation of the air/fuel ratio of the mixture supplied to the engine from stoichiometry and provides a control signal which is used to adjust the air/fuel ratio of the mixture supplied to the engine in direction tending to restore a stoichiometric air/fuel ratio. The control signal includes an integral correction term and an asymmetrical proportional correction term that abruptly shifts the value of the control signal upon a detected change in at least one direction in the sense of the deviation of the air/fuel ratio from a stoichiometric air/fuel ratio. The asymmetrical proportional term provides either singularly or in combination with an asymmetrical integral term a scheduled air/fuel ratio offset from the stoichiometric air/fuel ratio with the offset value being a function of the system gains and the limit cycle frequency of the control signal that is determined primarily by the transport delay through the engine and exhaust system.

REFERENCES:
patent: 4153022 (1979-05-01), Asano
patent: 4163433 (1979-08-01), Fujishiro

Affiliated with

Also associated with

Rating

Closed loop air/fuel ratio controller with asymmetrical proporti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Closed loop air/fuel ratio controller with asymmetrical proporti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed loop air/fuel ratio controller with asymmetrical proporti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2018455