METHOD AND SYSTEM FOR OPERATION OF OXYGEN CONTENT SENSOR IN EXHAUST GASES DEPENDING ON CONTACT OF WATER WITH SENSOR Russian patent published in 2019 - IPC F01N11/00 F02D41/00 F02D41/14 

FIELD: transportation.

SUBSTANCE: invention relates to transport engineering, particularly, to engine control methods. Disclosed are methods and systems for operation of oxygen content sensor in exhaust gases connected to exhaust channel of internal combustion engine, in response to detection of water on sensor. In one of the examples, the method can include an indication of the presence of water on the oxygen content sensor in the exhaust gases, placed in the engine exhaust passage, based on the oxygen content sensor parameter in the exhaust gases during operation of the oxygen content sensor in the exhaust gases in the controlled voltage (CV) mode, in which the reference voltage is controlled from the lower, first, voltage to the higher voltage, and the operation of the sensor and/or operation of engine depending on indication of presence of water.

EFFECT: technical result is longer service life of oxygen content sensor in exhaust gases and higher accuracy of estimates of air-fuel ratio based on sensor output signal, which improves engine efficiency.

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