Technical data

Table Of Contents
9
7
Requirement-oriented fuel delivery with variable pressure
In order to be able to make fuel at variable
pressure available to the engine
corresponding to the load status, the DME
activates the fuel pumps by means of the EKP
module such that the required target pressure
is set irrespective of the quantity of fuel
currently used. The target pressure varies
between 3 and 6 bar and can be checked with
a test module based on the target curve.
Manual measurement is no longer necessary.
The fuel control circuit consists of the
following components:
Electric fuel pumps (EKP)
EKP module
Fuel tank with components and line system
Fuel pressure sensor
Digital motor electronics (DME) with the
control logic.
Index Explanation Index Explanation
1 Dynamic stability control (DSC) 12 Throttle valve sensor (DKG)
2 Active cruise control (ACC) 13 Inverted throttle valve sensor (DKG)
3 Safety and gateway module (SGM) 14 Hot-film air mass meter (HFM)
4 Steering wheel 15 Idle speed actuator (LLS)
5 Sequential M gearbox (SMG) 16 Electric throttle valve actuator (EDR)
6 Pedal position sensor (PWG) 17 Electric throttle valve actuator (EDR)
7 Pedal position sensor (PWG) 18 Idle speed actuator (LLS)
8 Digital Motor Electronics (DME) 19 Inverted throttle valve sensor (DKG)
9 Brake light switch 20 Throttle valve sensor (DKG)
10 Clutch switch 21 Hot-film air mass meter (HFM)
11 Transmission switch, idle speed
2 - System circuit diagram of pressure control circuit
Index Explanation
1 Engine
2 Pressure sensor
3 Digital Motor Electronics (DME)
4 EKP module
5 Electric fuel pump (EKP 1)
6 Electric fuel pump (EKP 2)
7 Pressure regulator in fuel tank