Hydraulic system for energy regeneration in a work machine such as a wheel loader
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United States of America Patent
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Jan 30, 2018
Grant Date -
Jul 19, 2012
app pub date -
Dec 13, 2011
filing date -
Dec 13, 2011
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A hydraulic system is adapted to recover potential and kinetic energy of a work attachment of a work machine. A valve arrangement may configure the hydraulic system in various modes. The hydraulic system may provide suspension and/or actuation for the work attachment. The energy of the work attachment may move a rod of a first cylinder. The rod may pressurize fluid within the first cylinder. The pressurized fluid may flow from the first cylinder through a valve and into an accumulator. The first cylinder may amplify pressure of the fluid. The pressurized fluid in the accumulator may actuate the first cylinder. The movement of the rod of the first cylinder may cause simultaneous actuation of a second cylinder. A controller may monitor pressures and positions of components of the hydraulic system and control the valve arrangement.
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