Fuel tank component description - GF47.10-P-2000PS

MODEL 203 with ENGINE 113.988

MODEL 209 with ENGINE 113.987

Fig 1: Identifying Fuel Tank Components - Model 203 With Engine 113.988 (1 Of 2)

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).

Fig 2: Identifying Fuel Tank Components - Model 203 With Engine 113.988 (2 Of 2)

Design

The fuel tank consists of two-layer plastic and is divided into two chambers due to the U-shaped recess clearance. The chambers are connected to each other.

Function

The fuel flows from the two-stage fuel pump (M3) into the fuel delivery module (88), out of the right fuel tank chamber, through the fuel pressure line (B) to the fuel filter with fuel pressure regulator (55/2) into the left fuel tank chamber.

A junction with the fuel pressure line (D) supplies the suction jet pump (95). A suction effect is produced in the suction jet pump which draws the fuel from the deepest point out of the left fuel tank chamber to the fuel delivery module.

(C).

Moreover excess fuel flows from the fuel pressure regulator to the fuel delivery module (A).

This ensures that the left fuel tank chamber is properly emptied.

The filtered fuel with controlled fuel pressure (to around 3.8 bar) is supplied to the engine (92) via the fuel pressure line (single-line system).

The housing of the fuel delivery module serves as a swirl pot. While cornering with a low level of fuel in the fuel tank, it prevents the fuel pump from drawing air.

A fuel strainer is installed as a coarse filter at the bottom in the fuel delivery module at the feed to the fuel pump.

Each fuel tank chamber has a fuel level sensor (B4/1, B4/2). Both resistance values are sent separately to the rear SAM control unit with fuse and relay module (N10/2).