초록 ▼

A single meter blending fuel dispensing system utilizing a pair of proportional flow control valves each having a pressure transducer positioned aft of the valve flow control mechanism. A computer controller is used to program a desired fuel mixture by varying the pressure for each flow control valv

A single meter blending fuel dispensing system utilizing a pair of proportional flow control valves each having a pressure transducer positioned aft of the valve flow control mechanism. A computer controller is used to program a desired fuel mixture by varying the pressure for each flow control valve. A pressure decrease in one valve produces a corresponding pressure increase in the other valve. A third pressure transducer can be situated downstream of the valves and is set such that the pressure it receives cannot exceed that of the two valve pressures. Flow meters can be substituted for the pressure sensors. A calibration method for calibrating the positive displacement meter is also disclosed. At installation the positive displacement meter is at its most accurate and is synchronized with the less accurate pressure sensors or flow meters. As time passes and the positive displacement meter wears it can be re-calibrated using the baseline data and the pressure sensors or flow meters which are not subject to mechanical wear.

대표청구항 ▼

[ What is claimed is:] [1.]1. A system for blending two grades of fuel having dissimilar octane ratings into a third intermediate grade of fuel comprising:(a) a first flow control valve within a first fuel flow path, for receiving a low octane rated fuel;(b) a second flow control valve within a seco

[ What is claimed is:] [1.]1. A system for blending two grades of fuel having dissimilar octane ratings into a third intermediate grade of fuel comprising:(a) a first flow control valve within a first fuel flow path, for receiving a low octane rated fuel;(b) a second flow control valve within a second fuel flow path, for receiving a high octane rated fuel;(c) a first pressure transducer within said first fuel flow path proximate to said first flow control valve;(d) a second pressure transducer within said second fuel flow path proximate to said second flow control valve;(e) a manifold area for combining the low and high octane fuels from the first and second fuel flow paths into a single fuel flow path;(f) a meter within the combined single fuel flow path for measuring the amount of fuel to be dispensed;(g) a programmable controller coupled to said first and second pressure transducers and said first and second flow control valves, said controller for monitoring and controlling the operation of said first and second flow control valves; and(h) a third pressure transducer situated within the combined single fuel flow path for ensuring the pressure of the combined flow does not exceed the pressures of said first and second flow control valves,wherein a desired blend of fuel is achieved by proportionally varying said first and second flow control valves.