Lean air-fuel control using stoichiometric air-fuel sensors

Details Lean air-fuel control using stoichiometric air-fuel sensors Lean air-fuel control using stoichiometric air-fuel sensors

1980-11-20

1983-03-22

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123436, 123489, F02B 3300, F02B 300

Patent

active

043771432

ABSTRACT:
This specification discloses an air-fuel ratio control system for an internal combustion engine which can provide air-fuel feedback control at air-fuel ratios lean of stoichiometry while using an air-fuel sensor capable of only indicating stoichiometry. A control means pulses the air-fuel ratio to determine the magnitude of pulse necessary to cross stoichiometry. Thus the air-fuel ratio can be maintained at a desired offset from stoichiometry.

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