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The purposes of an accumulator in a hydraulic system are to..
  • A
    damp pressure fluctuations and serve as a limited alternate source of pressure.
  • B
    cool the hydraulic fluid and serve as a limited alternate source of pressure.
  • C
    cool the hydraulic fluid and serve as a main pressure source for normal operation.
  • D
    damp pressure fluctuations and serve as a main pressure source for normal operation.

Refer to figure.

Hydraulic Accumulators are usually installed in hydraulic systems to store energy, in the form of hydraulic fluid under pressure (which will allow limited operation of hydraulic services when the pump is not operating or in case of an emergency) and to dampen pressure fluctuations. They are often used to improve hydraulic-system efficiency, consisting of a piston moving in a cylinder. One side is connected to the hydraulic lines and contains hydraulic fluid, whereas the other side is filled with gas (usually nitrogen).

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