Valve Block Arrangement and Method for a Valve Block Arrangement
AssigneeRobert Bosch GmbH
InventorsWilfried Werner, Botond Szeles, Sebastian Oschmann
Life of this patent
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Abstract
A valve block arrangement configured as a closed center system includes at least one main spool for controlling a hydraulic consumer. The main spool is configured to open and close at least one pressure medium connection between a hydraulic pump and the consumer in controlled, continuous fashion and, in at least one embodiment, is electrically activated. A bypass flow path with a cut valve branches off between the adjustable, hydraulic pump and the main spool. The cut valve is configured to open and close a pressure medium connection between the hydraulic pump and a tank in controlled, continuous fashion. The cut valve is electrically activatable.
Claims14
A valve block arrangement, comprising:
- a closed center valve block having at least one main spool configured to control a hydraulic consumer, the at least one main spool assigned a pressure port and a working port;
- at least one hydraulic machine connected to the pressure port, a bypass flow path branching off fluidically between the pressure port and the at least one hydraulic machine;
- and
- an electrically activated cut valve configured to connect the bypass flow path to a tank, the bypass flow path throttlable via the cut valve.
A method for a valve block arrangement that includes a closed center valve block with at least one main spool configured to control a hydraulic consumer, the at least one main spool assigned a pressure port and a working port, at least one hydraulic machine connected to the pressure port, a bypass flow path branching off fluidically between the pressure port and the at least one hydraulic machine, and an electrically activated cut valve configured to connect the bypass flow path to a tank, the bypass flow path throttlable via the cut valve, the method comprising:
- one or more of (i) converting a preset value into a volume flow preset for the consumer, (ii) converting an adapted preset value into an item of load sensitivity information for the consumer, and (iii) converting the adapted preset value into a maximum pressure, and
- generating one or more actuation signals from the one or more converted preset values, wherein one or more of (i) a total volume preset for the hydraulic machine, (ii) a total throttling preset for the cut valve, (iii) a control variable for the main spool, and (iv) a control variable for the throttle is provided as the one more actuation signals.
Dependencies are inferred from the claim text.