Anytime the pressure in the accumulator exceeds the oil pressure in the engine, it pushes oil into the bearings. Let's say you are humming around a corner with 60 psi and you have starvation and the pressure starts to drop, the accumulator with push oil into the engine until the pressure equalizes. Once it equalizes, the accumulator will be at full capacity again momentarily. If you were to lose all oil pressure, it would oil for 3-4 seconds. When you shut off the engine, the accumulator empties into the engine. When you start the car, oil pressure will be low until it fills the accumulator.
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Todd
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