How Accusump Works

How The Accumulator Works The Accumulator is tapped to the pressure side of the engine’s oiling system. When the engine is running, oil pressure forces oil into the accumulator and compresses air ahead of it. Figure 1: Under normal conditions, oil pressure keeps a reserve of oil in the Accumulator under constant pressure. If oil pressure should suddenly drop because of hard acceleration, severe cornering or hard braking, air pressure immediately sends oil back into the engine. When the danger is over and the pump is once again supplied with oil, pressure in the engine forces oil back into the Accumulator where it is ready for the next emergency. Figure 2: When oil pressure drops, air pressure sends the stored oil into the engine at the main oil galleries to prevent damage.