VALVOLA ELETTROIDRAULICA DI CONTROLLO DELLA PRESSIONE

A solenoid operated valve which can be connected in an hydraulic circuit between a utiliser and a source of fluid under pressure for controlling the supply to the said utiliser (3), includes a spool (11) which is movable against the action of resilient means (43) and is provided with a first active...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MORETTI LUCIANO, DOTTI GIULIO
Format:	Patent
Sprache:	ita
Schlagworte:	BLASTING CONTROLLING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING PHYSICS REGULATING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES WEAPONS
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Beschreibung
Zusammenfassung:	A solenoid operated valve which can be connected in an hydraulic circuit between a utiliser and a source of fluid under pressure for controlling the supply to the said utiliser (3), includes a spool (11) which is movable against the action of resilient means (43) and is provided with a first active surface (40) sensitive to the pressure in a control chamber (27) provided with an inlet (41) and an outlet (24) for a control fluid. The outlet (24) from the control chamber (27) is provided with an electrically controlled valve member (20) and the spool (11) has a second active surface (44) opposite the first (40) and sensitive to the pressure in a reaction chamber (28) connected (via a passage (145)) to a first duct (7) communicating with the utiliser. The spool (11) is operable to put the first duct (7) in communication with a second duct (8) or a third duct (6) respectively connected to a discharge reservoir and to the said source. The utiliser may be a clutch of an automatic gearbox.