"Often times the noise you hear can be a droan or a moan which is caused by a faulty fuel accumulator. It's a component that maintains constant pressure in the lines. It can either be leaking fuel or the inner diaphragm spring could be broken".
Fuel accumulator
The fuel accumulator maintains the pressure in the fuel system for a certain time after the engine has been switched off. When the engine is running it serves to deaden the noise of the electric fuel pump. After the engine has been switched off, the fuel accumulator maintains the pressure in the fuel system in order to facilitate re-starting, particularly when the engine is hot. The design of the accumulator housing is such that it deadens the noise from the fuel pump when the engine is running. The interior of the fuel accumulator is divided into two chambers by means of a diaphragm. One chamber serves as the accumulator volume for the fuel, the other chamber contains a spring. During operation the accumulator chamber is filled with fuel. This causes the diaphragm to bend back against the force of the spring until it is halted by the stops in the spring chamber. The diaphragm remains in this position, which corresponds to the maximum accumulator volume, as long as the engine is running.fuelaccu.jpg
1. Spring chamber
2. Spring
3. Stop
4. Diaphragm
5. Accumulator column
6. Fuel inlet/outlet
7. Connection to the atmosphere
a) Empty b) Full
mbfuelpumpfilterfuelaccumulator.jpgStatistieken: Geplaatst door DeGoudenKoets — 22 okt 2010, 22:56
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