What function does the accumulator in a hydraulic brake booster perform?

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Multiple Choice

What function does the accumulator in a hydraulic brake booster perform?

The accumulator's job is to store pressurized hydraulic energy so the brake booster has a ready supply of boosted fluid when you brake. It provides enough pressurized fluid for additional assists (often at least a couple of stops) and acts as a backup reservoir to maintain pressure if the pump momentarily lags. The stored fluid is kept under pressure by a gas charge (usually nitrogen), which pushes on a piston or diaphragm to maintain that pressure rather than letting the fluid sit at atmospheric pressure. That combination of stored pressure and a gas precharge is what lets the brake boost respond quickly and consistently, especially during heavier braking.

The accumulator's job is to store pressurized hydraulic energy so the brake booster has a ready supply of boosted fluid when you brake. It provides enough pressurized fluid for additional assists (often at least a couple of stops) and acts as a backup reservoir to maintain pressure if the pump momentarily lags. The stored fluid is kept under pressure by a gas charge (usually nitrogen), which pushes on a piston or diaphragm to maintain that pressure rather than letting the fluid sit at atmospheric pressure. That combination of stored pressure and a gas precharge is what lets the brake boost respond quickly and consistently, especially during heavier braking.

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