Pic. 2.100. The principle of operation of the pressure accumulator.
1 - damper chamber: 2 - spring: 3 - stop; 4 - diaphragm: 5 - storage 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 damper 1 and accumulative 5 chambers separated by a diaphragm 4. An additional partition 6 with a disk valve is installed in front of the diaphragm, which provides fuel supply to the system. The baffle has a drainage hole 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 the engine is stopped, the fuel remains under pressure due to the tension of the diaphragm, the formation of vapors does not occur, which facilitates starting a hot engine.
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