Fig. 2.100. Operating principle of the pressure accumulator.
1 — damper chamber: 2 — spring: 3 — stop; 4 — diaphragm: 5 — accumulation chamber: 6 — partition; 7 — fuel supply: 8 — fuel outlet.
In addition, when the engine is running, it reduces the noise of the fuel pump. The pressure accumulator has a damper 1 and a storage 5 chamber, separated by a diaphragm 4. An additional partition 6 with a disc valve is installed in front of the diaphragm, providing fuel supply to the system. A drainage hole is made in the partition for draining the fuel. After turning on the pump, the storage chamber is filled with fuel and the elastic diaphragm is stretched to the stop 3. After stopping the engine, the fuel, due to the tension of the diaphragm, remains under pressure, vapor formation does not occur, which facilitates starting a hot engine.
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