Fluid handling – Processes – With control of flow by a condition or characteristic of a...
Patent
1976-06-18
1978-07-18
Nilson, Robert G.
Fluid handling
Processes
With control of flow by a condition or characteristic of a...
137503, 13761419, G05D 701
Patent
active
041009274
ABSTRACT:
Flow regulating apparatus comprises a turbulent-flow valve with a fluid supply connected at the upstream side thereof. A fixed pressure bias is applied to the fluid upstream of the valve whereby the mass flow rate of fluid through the valve is directly proportional to the pressure differential across the apparatus when these variations are within a selected pressure range. Such flow regulation may be used in a system for introducing a metered amount of liquid fuel into an air stream to provide a combustible air-fuel mixture having a substantially constant air-to-fuel ratio. With this system air is passed through a constricted zone to increase its velocity to sonic, and the area of the constricted zone is varied in correlation with operating demands imposed upon the engine for which the mixture is produced. A liquid fuel supply is under the influence of atmospheric pressure, and fuel is metered from the supply into the air stream by controlling a fuel valve of the turbulent-flow type in direct proportion to the area of the constricted zone, the fuel valve being exposed to the pressure of the air stream. The fixed pressure bias is applied to the liquid fuel supply so that the mass flow rate of fuel through the valve varies in direct proportion with variations in atmospheric pressure.
REFERENCES:
patent: 2340954 (1944-02-01), Garretson
patent: 2487520 (1949-11-01), Brown
patent: 3449923 (1969-06-01), Hansen
patent: 3598138 (1971-08-01), Hadley
patent: 3602252 (1971-08-01), Barnes
patent: 3791412 (1972-06-01), Mays
Dresser Industries Inc.
Nilson Robert G.
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