FIELD: engine building.
SUBSTANCE: invention in general relates to methods and systems for measuring air-fuel ratio based on output signals of oxygen sensor of waste gases. According to one example, the method may contain engine control based on an air-fuel ratio, estimated based on the output signal of the oxygen sensor of exhaust gases and the found correction coefficient. For example, the oxygen sensor can operate in a variable voltage mode, wherein the reference voltage of the oxygen sensor can be varied between a lower first voltage and a higher second voltage, wherein the detected correction factor is based on said second voltage.
EFFECT: disclosed are methods and system for controlling engine based on assessment of air-fuel ratio by means of oxygen sensor with variable voltage.
20 cl, 7 dwg
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