FIELD: internal combustion engines.
SUBSTANCE: invention relates to methods and systems for using pressure dependence of an oxygen sensor for estimating external pressure for an engine. Inlet or outlet oxygen sensor is used to estimate external pressure by applying a reference voltage to the sensor during the period when the engine speed in the hybrid car decreases, and the sensor is corrected to compensate for the effects of dilution due to ambient humidity.
EFFECT: value of the estimated external pressure is used to correct or confirm the pressure value estimated using other data sources, such as other pressure sensors or a pressure model, and is also used to tune the engine performance.
20 cl, 6 dwg
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