GF07.61-P-3004MIK ME Fuel Supply, Function

GF07.61-P-3004MIK ME Fuel Supply, Function
- refinement package
- as of model year 09

Component Identification:

Function requirements for fuel supply, general points
^ Circuit 15 ON (ignition ON)
^ Circuit 87M ON (engine control ON)

Fuel supply, general points
The fuel supply delivers a sufficient quantity of filtered fuel from the fuel tank to the fuel injectors, in all operating conditions and at sufficient pressure (injection pressure).

Fuel supply, function sequence
The fuel supply function sequence is divided into the following points:
^ Fuel pump actuation function sequence
^ Fuel delivery function sequence

Fuel pump actuation function sequence
The fuel pump is actuated directly by the ME-SFI control unit (N3/10) through the fuel pump relay (N10/2kA). The fuel pump relay is actuated by a ground signal from the ME-SFI control unit. In the case of an actuated relay the fuel pump is connected with "circuit 30".
There is no regulation of fuel delivery. This is only dependent on the on-board power supply and is about 130 l/h.

Fuel delivery function sequence
The fuel pump draws fuel from the bottom of the fuel feed module through the fuel strainer, and pumps it through the fuel filter with fuel pressure regulator to the fuel distribution rail (one-line system). The fuel pressure is limited to about 3.8 bar by the fuel pressure regulator.

The fuel return from the fuel pressure regulator flows back into the fuel feed module.
To fill the fuel feed module with fuel when the fuel level is low, a suction jet pump is installed beside the fuel pump. This is supplied with fuel directly by the fuel pump through a separate fuel line.