FIELD: machine building.
SUBSTANCE: invention relates to engine cooling system. Disclosed are methods and systems for improving evaluation of engine coolant level in order to reduce engine overheating. Liquid level in the expansion tank can be estimated based on the liquid level in the hollow vertical tube connected to the hydraulic connection with the tank in the upper and lower parts, wherein the level of liquid in the tube can be estimated based on the output ultrasonic signal emitted by the sensor located in the compartment in the lower part of the vertical tube. Use of the sensor power is optimized based on the ratio of the first-order echo signal time value and the higher-order echo signal time in the raw data set generated by the sensor.
EFFECT: invention provides higher accuracy and reliability of determining the coolant level in the expansion tank of the coolant.
20 cl, 21 dwg
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