Method and arrangement for controlling at least two hydraulic consumers
AssigneeBosch Rexroth AG
InventorsHorst Hesse, Gerhard Keuper, Heinrich Loedige
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Abstract
Disclosed are a control arrangement for actuation of at least two hydraulic consumers, and a method for actuation of these consumers. The latter are supplied with pressure medium through the intermediary of a pump, wherein a respective meter-in orifice and a pressure compensator arranged downstream from the latter are provided between the consumers and the pump. In accordance with the invention, adjustment of the pump is performed in dependence on the target values to which the meter-in orifices are set.
Claims11
A control arrangement for the pressure medium supply of at least two hydraulic consumers, comprising a pump having a variable capacity, and comprising two adjustable meter-in orifices, a first one of which is disposed between a supply line issuing from the pump and a first hydraulic consumer, and the second one of which is disposed between a supply line and a second hydraulic consumer, and comprising two pressure compensators, a first one of which is arranged downstream from the first meter-in orifice, and the second one of which is arranged downstream from the second meter-in orifice, and the control pistons of which are adapted to be subjected on a front side to the pressure downstream from the respective meter-in orifice in the opening direction, and in the closing direction to the highest load pressure or to a pressure derived therefrom, wherein the pump and the meter-in orifices are adjustable, preferably proportionally, characterized by a control means for outputting a control signal to the pump in dependence on the target values predetermined for the meter-in orifices.
A method for controlling at least two hydraulic consumers adapted to be supplied with pressure medium through the intermediary of a variable-capacity pump, wherein to each consumer a meter-in orifice is associated, that are provided between the pump and the respective consumer and downstream of which a respective pressure compensator is arranged, the control piston of which is subjected to the pressure behind the upstream meter-in orifice in the opening direction, and in the closing direction to the highest load pressure or to a pressure derived therefrom, characterized in that the pump is operated in dependence on the target values predetermined for the meter-in orifices.
Dependencies are inferred from the claim text.