File Engineering: The Driver Wish Map on Bosch EDC15P+

 After covering the Torque Limiter, Smoke Limiter, and Turbo Boost Pressure control, let's step back to the very origin of the acceleration process: the Driver Wish map.

If you feel like your car feels "heavy" on throttle response or you want a more immediate and linear power delivery, this is where it all starts. If you modify your limiters but forget the Driver Wish, the ECU will simply ignore how hard you press the accelerator pedal.

Let's break down how this map works and how to interpret it correctly in the Bosch EDC15P+ architecture.

1. Concept and Operation of the Driver Wish

The Driver Wish is the very first map in the injection logic chain. It translates the accelerator pedal angle (or load percentage) into requested torque ($Nm$) or requested fuel quantity ($mg/str$).

• X-Axis (Columns): RPM (Engine Revolutions Per Minute).

• Y-Axis (Rows): Accelerator Pedal Position (usually expressed in percentage from 0% to 100%).

• Z-Axis (Map Body): Requested Torque or requested fuel quantity.

Note: In EDC15 dumps, the Driver Wish map often appears multiple times (sometimes with separate blocks for different gears or driving modes, though the main one commands general driving load).

2. Configuring Factors in WinOls

To read and edit the map correctly without guessing raw values, apply the following standard factors in WinOls:

• X-Axis (RPM):

  • Factor: 0.250000

  • Unit: RPM

• Y-Axis (Pedal Position):

  • Factor: 0.012200 (or adjusted for direct percentage).

  • Unit: %

• Map Body (Z - Request):

  • Factor: 0.100000

  • Unit: Nm or mg/str (depending on whether the software version translates the request directly to torque or fuel mass).

3. Rules for a Proper Modification

1. Don't overdo 100% pedal at low RPM: Asking for maximum torque right below 1500 RPM at wide-open throttle (100%) will cause excessive vibrations in the drivetrain and place unnecessary stress on the dual-mass flywheel. Keep the progression smooth.

2. The Map Hierarchy Rule: Always remember the golden rule of chiptuning: the ECU always executes the lowest value permitted by the active limiters. If your Driver Wish requests 70 mg/str of fuel, but your Torque Limiter only allows 55 mg/str, the car will cap fuel at 55 mg. The Driver Wish only defines the ceiling of what the driver wants; the limiters dictate mechanical reality.

3. Pedal Sensitivity: You can adjust intermediate columns (e.g., 20% to 60% loads) to give a livelier feel to the car with less pedal travel, simulating a more sporty behavior without needing to push the throttle to the floor all the time.