Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1985-11-01
1987-08-25
Husar, Stephen F.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60445, F16D 3102
Patent
active
046883819
ABSTRACT:
Hydraulic control arrangement for a driven working device particularly mounted on an agricultural vehicle, comprises a hydromotor for driving a working device, a blocking unit having a blocking valve and a pushing piston, a control valve including a control slider which controls the blocking unit and has three control edges, and a control chamber, two working chambers, and two return chambers, a throttle valve having a throttle slider and a spring arranged in a chamber and loading the throttle slider, a working conduit leading from an inlet via the throttle slider, the first control edge of the control slider and the blocking valve to the hydromotor and allowing a load pressure-independent control, a control conduit branching from the working conduit and extending via the third control edge of the control slider, the control chamber and the second return chamber to a tank, and supplied with a control pressure medium in a lowering position of the control slider via the throttle slider, and two throttle points arranged in the control conduit. Wherein the control chamber of the control valve is arranged between the second working chamber and the second return chamber, and the control conduit has a portion between the first working chamber and the control chamber in the region of the slider opening of the control valve through which the second working chamber extends.
Aichele Hans
Beck Walter
Schwerin Gunther
Husar Stephen F.
Robert & Bosch GmbH
Striker Michael J.
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