Arrangement for operating a hydraulic device
First Claim
1. Fluid system comprising a controllable first pump unit for supplying fluid pressure to at least one implement;
- a prime mover arranged to supply a driving torque to the first pump unit;
the first pump unit arranged to supply fluid pressure to the at least one implement, a controllable second pump unit connected to a fluid accumulator;
the prime mover arranged to supply a driving torque to the second pump unit;
the second pump unit arranged to accumulate fluid pressure in the accumulator during periods of low demand; and
fluid pressure from the accumulator arranged to drive the second pump unit to assist the prime mover during periods of high demand in order to supply an additional driving torque in excess of the available driving torque from the prime mover.
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0 Petitions
Accused Products
Abstract
A fluid system includes a controllable first pump unit for supplying fluid pressure to at least one implement; a prime mover arranged to supply a driving torque to the first pump The first pump unit is arranged to supply fluid pressure to the implement. The fluid system further includes a controllable second pump unit connected to a fluid accumulator. The prime mover is arranged to supply a driving torque to the second pump unit in order to accumulate fluid pressure in the accumulator during periods of low demand. Fluid pressure from the accumulator is arranged to drive the second pump unit to assist the prime mover during periods of high demand in order to supply an additional driving torque in excess of the available driving torque from the prime mover.
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Citations
18 Claims
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1. Fluid system comprising a controllable first pump unit for supplying fluid pressure to at least one implement;
- a prime mover arranged to supply a driving torque to the first pump unit;
the first pump unit arranged to supply fluid pressure to the at least one implement, a controllable second pump unit connected to a fluid accumulator;
the prime mover arranged to supply a driving torque to the second pump unit;
the second pump unit arranged to accumulate fluid pressure in the accumulator during periods of low demand; and
fluid pressure from the accumulator arranged to drive the second pump unit to assist the prime mover during periods of high demand in order to supply an additional driving torque in excess of the available driving torque from the prime mover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- a prime mover arranged to supply a driving torque to the first pump unit;
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13. Method for controlling a fluid system comprising a controllable first pump unit for supplying fluid pressure to at least one implement;
- a prime mover arranged to drive the first pump unit;
a controllable second pump unit connected to a fluid accumulator and at least comprising;controlling the prime mover to supply a driving torque to the first pump unit to supply fluid pressure to the implement in response to the load on the implement; controlling the prime mover to drive the second pump unit for accumulating fluid pressure in the accumulator during periods of low load on the implement; controlling fluid pressure from the accumulator to drive the second pump unit as a motor to assist the prime mover during periods of high demand by supplying an additional driving torque in excess of the available driving torque from the prime mover for driving the first pump unit. - View Dependent Claims (14, 15, 16, 17, 18)
- a prime mover arranged to drive the first pump unit;
Specification