Electronic Diesel Control (EDC) function

W07.12-0035-09

1 At vehicle side: vehicle engine control (FMR)

1.1 Accelerator pedal with foot throttle actuator (potentiometer, idle throttle switch, kickdown switch)

1.2 Clutch switch, brake lights switch (Tempomat cutoff)

1.3 Hand throttle actuator (special equipment, or fitted by customer or body manufacturer)

1.4 Tachograph (I module)

1.5 Tempomat/Temposet operating lever

1.6 Engine brake (and as of 16 t constant throttle)

1.7 Circuitry for PTO (special equipment, or customer-fitted)

1.8 ASR throttle reduction (ABS/ASR control unit C5)

1.9 Retarder throttle reduction (retarder control unit)

1.10 WSK throttle reduction (guard function for torque converter clutch)

1.11 Drive switch (engine start signal at terminal 50, engine stop signal for EDC control unit at terminal 15)

1.12 EDC warning light (goes out when engine running)

1.13 E module (FMR control unit)

2 At engine side: Electronic Diesel Control (EDC)

2.1 EDC control unit with atmospheric pressure sensor

2.2 FMR speed sensor (auxiliary speed sensor at starter ring gear)

2.3 Nozzle holder combination with needle motion sensor

2.4 Boost pressure sensor

2.5 EDC speed sensor

2.6 Boost air temperature sensor

2.7 Coolant temperature sensor

2.8 Fuel temperature sensor

2.9 Start and Stop button at engine

2.10 Fuel rack position sensor (fuel metering control position feedback)

2.11 Fuel metering control (injected quantity control)

2.12 Control sleeve actuator (start of injection control)

2.13 Electric engine stop device

3 HHT: diagnosis and parameterization

4 14-pin diagnostic socket

5 FDS (standard):diagnosis; FSS (special equipment)

6 CAN (Controller Area Network) data line

Entire function of Electronic Diesel Cntrol (EDC)

- Controlling the quantity of fuel injected and start of delivery of the control sleeve injection pump of the intercooled
V engine 441 LA (6-cylinder) or 442 LA (8-cylinder).

- Vehicle and engine control functions are performed by the main components and their respective peripherals.

- EDC functions when engine is stationary, when engine started and when driving (emergency driving mode).

Main components of the EDC

 Vehicle-engine control (FMR) control unit

 Electronic Diesel Control (EDC) control unit

 Control sleeve injection pump

Functions of the EDC main components

Vehicle-engine control (FMR) control unit

Peripherals: sensors for driver control inputs

Receiving and processing control inputs which are stored or set in the control unit (e.g., idle speed, vehicle speed limit) or which come from the driver (e.g., accelerator pedal, Tempomat, engine brake).

Passing on the processed control input through the data face (CAN data bus) to the EDC control electronics. Checking that the control inputs have been performed by means of feedback signal.

Electronic Diesel Control (EDC) control unit

Peripherals: sensors of control-relevant engine data

Receiving and processing the following data signals:

-Engine data signals (e.g., engine speed, service product temperature) by means of sensors

-Feedback sensors of injection pump

-Data of FMR electronics

Computing optimal quantity injected, electric actuation and monitoring of control sleeve injection pump.

Control sleeve injection pump

Peripherals: sender and sensor components

-Converting the signal supply by the EDC control unit into control of the fuel quantity and of start of delivery.

-Feedback signal to the EDC control unit