Fuel Filter: Description and Operation

GF47.20-P-2110VB Component Description For The Fuel Filter With Fuel Pressure Regulator







Location
The fuel filter with fuel pressure regulator is located in the left fuel tank chamber.

Task
Filtering impurities out of the fuel. Maintaining constant fuel pressure in wide limits irrespective of the fuel pump delivery.







Function
The fuel filter element is integrated in a plastic housing. The fuel flows through it from the outside to the inside. As a result any impurities are trapped.

The fuel pressure regulator controls the fuel pressure of around 3.8 bar (system pressure) via the fuel return volume

If the set fuel pressure is exceeded, the diaphragm is pushed against the push spring and the valve attached to the diaphragm continues to open the passage for the fuel return.

If the set fuel pressure is below the limit, the valve is closed further again by means of the push spring.







A greatly varying fuel pump delivery (e.g. 20 or 140 liters per hour) does not have any great effect on the fuel pressure.