Method and control device for dosing flow media

Details Method and control device for dosing flow media Method and control device for dosing flow media

1978-11-09

1982-02-02

Cline, William R.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

251129, F16K 3102

Patent

active

043134653

ABSTRACT:
A method and system for providing dosing of fluid is described. The method and system is directed to the control of a plurality of parallel on/off valves which regulate the flow of the fluid. The system includes a plurality of base control valves for delivering a base flow amount. The base control valves are preferably arranged to have binary graduation of their respective flow rates. These base control valves are optionally discontinuously switched on and/or off for delivering the base flow amount. A "timed" valve is varied according to pulse-width modulation techniques to deliver a continuously variable partial flow. The control of the timed valve is effected by electrical circuitry which generates a feedback error signal related to the flow quantity.

REFERENCES:
patent: 3081942 (1963-03-01), McClay
patent: 3726296 (1973-04-01), Friedland
patent: 3874407 (1975-04-01), Griswold
patent: 3886971 (1975-06-01), Lundsgaard
patent: 3942553 (1976-03-01), Gallatin
patent: 4036011 (1977-07-01), Gupta

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