Methods for metering fluid and apparatus for use therewith

Details Methods for metering fluid and apparatus for use therewith Methods for metering fluid and apparatus for use therewith

1988-08-30

1990-08-28

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39281, F02C 7232, F02C 926

Patent

active

049514598

ABSTRACT:
Methods for metering fluid flow and apparatus adapted for use with the methods. The apparatus (5) comprises an electrohydraulic solenoid (6) secured to and in fluid communication wiht a metering valve body (8). A cylindrical spool (15) is disposed in a channel (16) formed in the valve body (8), and variably blocks a flow path (74,90,75) extending through the valve body in response to variations in fluid pressure in a chamber (68) which is defined by the solenoid (6), the valve body (8), and the spool (15). Fluid is delivered to and vented from the chamber (68) through the solenoid (6), and the pressure in the chamber varies with the duty cycle of pulses communicated to the solenoid (6).

REFERENCES:
patent: 3292367 (1966-12-01), Bauger et al.
patent: 3946551 (1976-03-01), Linebrink et al.
patent: 4015426 (1977-04-01), Hobo et al.
patent: 4386553 (1983-06-01), Thoman et al.
patent: 4454713 (1984-06-01), Meyer et al.
patent: 4609011 (1986-09-01), Uehara

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