FIELD: engines and pumps.
SUBSTANCE: proposed system comprises fuel tank incorporating fuel pump arranged there inside and equipped with main impeller, feed pipeline, pump drive and pump drive control device. Fuel pump is furnished with extra impeller arranged in fuel pump top section, bypass channel arranged along pump case side surface, pump operating conditions selector switch. Said extra impeller is made up of four-sided plate with four vanes attached to plate sides and fitted on common shaft with MAIN impeller and drive. Bypass channel inlet is located under main impeller. Bypass channel outlet is located under extra impeller. To change bypass channel control valve is used displaced by step motor.
EFFECT: higher reliability and accuracy.
5 cl, 3 dwg
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