What is the primary function of a hydraulic accumulator?

• A. Increase system pressure
• B. Store hydraulic fluid
• C. Filter contaminants
• D. Regulate fluid temperature

Answer: (B)

The primary function of a hydraulic accumulator is to store hydraulic fluid. This device acts as a reservoir that holds a specific volume of hydraulic fluid under pressure, which can be released when needed to assist in maintaining pressure in the system or to provide additional fluid during peak load conditions. This capability helps ensure consistent and reliable operation of hydraulic systems, especially when there are fluctuations in demand.

By storing fluid, accumulators can also help dampen pressure spikes and provide a source of hydraulic power during brief interruptions in pump operation. When the pump is not actively supplying fluid, the accumulator can deliver the stored hydraulic fluid to maintain system function, making it an essential component in hydraulic systems.

While other options such as increasing system pressure, filtering contaminants, and regulating fluid temperature relate to important aspects of hydraulic systems, they do not capture the primary purpose of an accumulator as effectively as the storage function does.