Compared to using the pump alone, what happens when the accumulator is engaged?

• A. The cylinder moves faster due to extra hydraulic oil.
• B. The cylinder experiences lower pressure.
• C. The cylinder experiences more friction.
• D. The cylinder loses oil.

Answer: (D)

An accumulator stores energy as a reservoir of pressurized fluid and, when engaged, releases that fluid into the circuit. This adds a rapid burst of flow to the actuator, so the cylinder can move faster during short movements or peak-load moments. Since speed of the cylinder is related to the flow rate divided by the piston area, that extra flow from the accumulator translates into a quicker extension or retraction when needed. It can also help hold or smooth pressure during brief spikes, reducing demand on the pump. Oil isn’t lost from the system when the accumulator is used—the oil remains in the hydraulic circuit, with the energy stored in the accumulator being returned to the line as needed.