GF47.10-P-2000PE | Fuel tank - Description of components | 19.1.05 |
MODEL 203 with ENGINE 271.921 up to Model Year 8
MODEL 203 with ENGINE 271.940 up to Model Year 8
MODEL 203 with ENGINE 271.946 up to Model Year 8
MODEL 203 with ENGINE 271.948 up to Model Year 8
MODEL 209 with ENGINE 271.955
MODEL 209 with ENGINE 271.940
P47.10-2319-06
Location
75 Fuel tank
88 Fuel delivery module
B4/1 Left tank half fuel level sensor
B4/2 Right tank half fuel level sensor
M3 Fuel pump
The fuel tank is positioned at the frame floor ahead of the rear axle because of the through-loading facility (from trunk into passenger compartment).
Design
The fuel tank is made of double-layer plastic. Due to the
"U"-shaped cut-out, the fuel tank is divided into two interconnected chambers.
P47.10-2050-06
Function
1 Pin 1 Fuel pump ground
2 Pin 2 : fuel signal
3 Pin 3 : fuel signal
4 Pin 4 Fuel pump circuit 87
86 Union nut
87 Compression spring
88 Fuel delivery module
89/1 Left closing plate
89/2 Right closing plate
90 Fuel pressure line to fuel filter with integrated fuel pressure regulator
91 Fuel line (from the suction jet pump to the fuel delivery module)
95 Suction jet pump
B4/1 Left tank half fuel level sensor
B4/2 Right tank half fuel level sensor
B4/3 Tank pressure sensor (ON )
M3 Fuel pump
A Fuel to fuel filter with integrated fuel pressure regulator
B Fuel return from fuel pressure regulator
C Fuel intake from left fuel tank chamber
The fuel pump (located in the left tank chamber) pumps the fuel via a fuel pressure line to the fuel filter with integrated fuel pressure regulator. The fuel filter with integrated fuel pressure regulator is secured from the outside to the left fuel tank chamber.
Excess pumped fuel flows from the fuel pressure regulator via the fuel return to the suction jet pump back to the left fuel tank chamber. As a result, there is a differential pressure in the suction jet pump that draws the fuel from the deepest point in the left fuel tank chamber and pumps it to the fuel delivery module into the right tank chamber. This ensures that the left fuel tank chamber is properly emptied.
The filtered fuel, at a regulated fuel pressure of around 3.8 bar, is pumped from the fuel pressure regulator via the fuel pressure line to the engine (single-line system).
The housing of the fuel delivery module serves as a swirl pot. A swirl pot prevents the fuel pump drawing in air when cornering with a low level of fuel in the tank.
Each fuel tank chamber contains a fuel level indicator for detection of the fuel level.