Torque limit control

A hydraulic management control system comprising of power generation apparatus to deliver mechanical power to a plurality of hydraulic pumps. A prime mover or engine 152 transfers power to a first hydraulic circuit 160 including a first hydraulic pump 156 and a second hydraulic circuit 174 including...

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Bibliographische Detailangaben
Hauptverfasser:	ERIC ENGELMANN, JAMES A AARDEMA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING CONTROLLING COMBUSTION ENGINES DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DREDGING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FOUNDATIONS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS HYDRAULIC ENGINEERING HYDRAULICS OR PNEUMATICS IN GENERAL INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING PHYSICS REGULATING SOIL SHIFTING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A hydraulic management control system comprising of power generation apparatus to deliver mechanical power to a plurality of hydraulic pumps. A prime mover or engine 152 transfers power to a first hydraulic circuit 160 including a first hydraulic pump 156 and a second hydraulic circuit 174 including a second hydraulic pump 172, via a power take off (PTO) 154. Fluid pressure in the first hydraulic circuit is used to control a pressure relief valve 178 coupled between the two hydraulic circuits to limit pressure in the second hydraulic circuit as a function of torque load placed on the apparatus by the first hydraulic pump. Typical applications would include road compactors or excavators, where the first hydraulic circuit may have a higher priority function, such as steering, compared to that of the second hydraulic circuit which may power a tool.