ELECTROHYDRAULIC CONTROL SYSTEM (VERSIONS) Russian patent published in 2001 - IPC

FIELD: machine-building hydraulics. SUBSTANCE: control system has a variable-efficiency pump, one or several multisectional distributors with LS channel, control panel which outputs are connected to control inputs of respective distributing sections. Pump output is connected to pressure lines of distributors, and suction cavity of pump and drain lines of distributors are connected to tank. The system also includes pump electrohydraulic regulator, pump pressure transducer, LS channel pressure transducer, and functional control unit consisting of summing amplifier, limiting member and setting member. Output of pump pressure transducer is connected to the first inverting input of adder, output of LS channel pressure transducer is connected to the second noninverting input of adder through limiting member, setting member output is connected to the third noninverting input of adder, and adder output is connected to control input of pump regulator. The system operates in mode sensitive to load and in pressure maintenance mode. EFFECT: extended functional capabilities. 2 cl, 3 dwg