GF47.10-P-2000VD | Component description for fuel tank | 18.3.08 |
MODEL 203 with ENGINE 272.920 /940 /941 up to Model Year 08 /modification year 07
MODEL 209 with ENGINE 272.940
P47.10-2070-06
45 Filler neck
46 Fuel tank air admission line
47 Fuel line shuts off nozzle when refueling
75 Fuel tank
77 Activated charcoal canister
84 Cap
88 Fuel feed module (under closing plate, right)
89/1 Left closing plate
92 Fuel pressure line to the engine
93 Purge line to purge control valve
B4/3 Fuel tank pressure sensor
M3 Fuel pump
Y58/4 Activated charcoal canister
shut-off valve
P47.10-2050-06
86 Union nut
87 Compression spring
88 Fuel delivery module
89/1 Left closing plate
Pin 1 Fuel pump ground
Pin 2 Fuel level sensor
Pin 3 Fuel level sensor
Pin 4 Fuel pump, circuit 87
89/2 Right closing plate
90 Fuel pressure line
(to connection A)
A Connection to fuel filter with integrated fuel pressure regulator
B Return line connection from fuel pressure regulator
C Fuel intake from left fuel tank chamber to fuel supply module
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 Fuel tank pressure sensor
M3 Fuel pump
Location
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).
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Design
The fuel tank consists of
2-layer plastic. it is split into two chambers because of the "U"-shaped recess. The chambers are connected with each other. The fuel filter with fuel pressure regulator is located in the outside of the fuel tank.
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Function
The fuel feed module (88), with the fuel pump (M3) and the "Fuel level sensor, left half of tank" (B4/2), is located in the right fuel tank chamber. A closing plate (89/1) with connection fitting, cable connector, suction jet pump (95), fuel level sensor, left half of tank (B4/1) and the fuel tank pressure sensor (B4/3 ) is mounted in the left fuel tank chamber.
The fuel flows from the 2-stage fuel pump in the fuel feed module along the fuel pressure line (90) via the connection (A) to the fuel filter with integrated fuel pressure regulator. Excess fuel flows back through the return line connection (B) via the suction spray pump (95) and the fuel line (91) into the right tank chamber. A suction effect is produced in the suction spray pump which draws the fuel from the lowest point out of the left fuel tank chamber to the fuel feed module. This ensures that the left fuel tank chamber is properly emptied.
The housing of the fuel delivery module serves as a swirl pot. When cornering with a low level of fuel in the fuel tank, it prevents the fuel pump drawing in air.
Fuel strainers are provided at the bottom of the fuel feed module and at the inlet to the fuel pump.
Each fuel tank chamber has a fuel level sensor (lever sensor with potentiometer and sliding contact). The resistances of the two fuel gage sensors are connected electrically in series (each 100 Ω). Fuel tank full: empty. 0 Ω
Fuel tank full: approx. 200 Ω
The fuel tank has no outlet valves. It is drained through the fuel pump via the fuel line into the engine compartment.