Patent ID: 8347617

Claim:
A hydraulic dual-circuit system for activating consumers of a mobile device, in particular a crawler-track device, in the case of which a variable-displacement pump is assigned to each hydraulic circuit ( 2 , 4 ), via which the assigned consumers may be supplied with pressure medium, it being possible to connect the two circuits ( 2 , 4 ) via an interconnecting valve system ( 38 ) in a manner such that the variable-displacement pump of one circuit ( 2 , 4 ) pumps pressure medium into the other circuit ( 4 , 2 ), and it being possible to activate the variable-displacement pumps as a function of the load pressure in the assigned circuit ( 2 , 4 ), wherein the interconnecting valve system ( 38 ) includes an interconnecting valve ( 40 ) having two pressure ports (P 1 , P 2 ), two LS input ports, and two LS output ports (LS 1 , LS 2 ; LS 1 ′, LS 2 ′), and a valve body ( 42 ) which is acted upon in one direction by the highest load pressure in the first circuit ( 2 ) and by the pump pressure in the second circuit ( 4 ), and, in the opposite direction, by the highest load pressure in the second circuit ( 4 ), and by the pump pressure in the first circuit ( 2 ), so that, depending on the resultant control pressure differential acting on the valve body ( 42 ), it possible to connect the two pressure ports (P 1 , P 2 ) and one LS input port (LS 1 , LS 2 ) which is assigned to one circuit to one LS output port (LS 1 ′, LS 2 ′) which is assigned to the other circuit.