Liquid fuel blending dispensing pump

Details Liquid fuel blending dispensing pump Liquid fuel blending dispensing pump

G - Physics

05

D

354/37

G05D 11/13 (2006.01) B67D 7/08 (2010.01) B67D 7/28 (2010.01) B67D 7/74 (2010.01)

Patent

CA 1055609

ABSTRACT A liquid fuel blending dispensing pump which has advantageous operating characteristics over known types of pumps utilizing a mechanical computer. The disclosed pump-includes a mixer valve for mixing the fuel from two lines to give a desired blended grade. A pulse generator is associated with each fuel line to give a pulse output for each unit quantity of respective base grade dispensed. A pulse rate adjuster is connected to the output of one of the pulse generators and is settable in accordance with the blend grade selected so that a first pulse train is given from the pulse rate adjuster and a second pulse train is given from the other pulse generator. The pulse trains are of equal frequency when the respective flow rates are correct, and a comparator is provided for comparing the frequencies of the pulse trains and giving an error signal representative of any discrepancy. A servo-control is res- ponsive to the error signal to drive the mixer valve so as to tend to reduce the error signal to zero.

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