SYSTEM AND METHOD FOR CONTROLLING CARBURETTOR-SUPPLIED ENGINES WITH LAMBDA PROBE

摘要

An electronic control system of the operation of carburettor-supplied internal combustion engines, and control method thereof are disclosed. The system comprises a control unit suited to drive at least one electrovalve device for the adjustment of the emulsion air of the carburettor which determines the air/ fuel ratio (AFR) of the fuel mixture and further comprises an O2 sensor probe, having a single-wire arrangement, suitable for reading the composition of exhaust gases and for sending a signal of the amount of O2 towards said control unit, wherein said O2 sensor operates switching between two states of O2 (Lean02Threshold, Rich02Threshold) and the control of said electrovalve device for the carburettor adjustment is a closed loop control based on said two O2 states.