Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1979-03-15
1981-03-03
Goldberg, Gerald
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
1374875, G05D 1620
Patent
active
042534801
ABSTRACT:
A pressure regulator has at least one solenoid valve operated by electrical signals connected to a container the actual pressure of which is indicated by a pressure electric transducer. A comparator generates a regulation signal which is the difference between the actual pressure and a command pressure signal. A regulator is connected to the comparator for generating a control signal to the solenoid valve in such a manner that the valve member of the solenoid valve is adjustable in a stable manner between intermediate positions within a range between the open and closed positions of the valve such that throttled pressure media continuously flows through the valve. The valve adjustment signal can be a continuously variable direct voltage which is proportional to the output signal of the regulator and may be a rectangular or saw-toothed voltage with a frequency exceeding the maximum actuating frequency of the solenoid valve. The regulator has an integral function and is preferably a proportional integral regulator. The container may be provided with both inlet and outlet valves for control of the pressure in the container and the regulator produces separate control signals for the inlet and outlet valves.
REFERENCES:
patent: 3398993 (1968-07-01), Sarbach
patent: 3402972 (1968-09-01), Cooper
patent: 3807810 (1974-04-01), Yarber
patent: 3856034 (1974-12-01), Itoh
patent: 3858598 (1975-01-01), Carman
Kessel Gerd
Kummeke Heinrich
Kupfer Hans-Jurgen
Rau Joachim
Corr Denis E.
Goldberg Gerald
Jaskiewicz Edmund M.
Knorr-Bremse GmbH
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