Variably charged hydraulic circuit

A hydraulic fluid circuit system is provided for use in a vehicle and having a priority and a second fluid circuit therein. A variable displacement pump is the primary fluid source for the priority circuit, and a fixed displacement pump is the primary fluid source for the second fluid circuit. A dem...

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Bibliographische Detailangaben
1. Verfasser:	BECKER, LANSON
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A hydraulic fluid circuit system is provided for use in a vehicle and having a priority and a second fluid circuit therein. A variable displacement pump is the primary fluid source for the priority circuit, and a fixed displacement pump is the primary fluid source for the second fluid circuit. A demand valve responsive to differential fluid pressure between the priority circuit and the output of the variable displacement pump selectively switches increasing amounts of output from the fixed displacement pump into the priority circuit in proportion to the output of the variable displacement pump. The demand valve includes a three positioned spool valve. The priority circuit may include a hydraulic steering system, and the second fluid circuit may include an implement or accessory circuit.