Accusumps Oil Accumulators are designed collect pressurized oil from your engine and store it so it may be discharged later. At the time the engine is shut off and the Accusump valve closes any oil pressure in the Accusump is held there. On engine start-up when the valve on the oil side is opened the pressurized oil is released into the engine and therefore pre-lubricates the engine prior to start-up.
After the engine is started and the oil pump has taken over, oil is pumped back into the Accusump. This moves the piston back and pressurizes the Accusump until it equalizes with engine's oil pressure. While driving, if the engine's oil pressure is interrupted for any reason, the Accusump releases its oil reserve again, keeping the engine lubricated until the engine's oil pressure comes back to normal. This release of oil could last from 15 to 60 seconds, depending on the size and speed of the engine. In racing or hard driving conditions, the Accusump will automatically fill and discharge when needed as you corner, accelerate and brake.