I thought I did but clearly Idon’t understand the technical aspects very well lol. Can you explain in layman’s terms what the implications of this are ?
It is new DME program code and a new wireless OBD plug in device to do the following on N55/S55:
Realtime tuning whilst the engine is running. Any table or value, but not all at once, changes lost when DME shuts down after car locked but can be made permanent with a short flash once you are done experimenting/tuning. Could be used for live adjustment as well as tuning. This is done with TunerProRT on a PC using existing xdf. This is a rare feature on OEM ECUs and speeds up dramatically the tuning and development process.
Flex fuel or control of fuel, boost, timing, cold start based on input from ethanol content sensor or other setups like water/meth or port injection system. Could also be a manual map switch/blend and the switch device could be a phone and the setting is remembered when car is locked. New flex fuel tables also can be tuned whilst engine running. Safety features to show MIL/CEL if ethanol content input expected but missing. Safety features to show MIL/CEL if lean or fuel pressure too low.
The flex fuel input is through CAN bus via the wireless OBD device which is being made as small as possible but could be installed somewhere else and coexists with other OBD devices. Flex fuel sensor will be connected to the OBD socket pin 1. There are four other pins in the design available for future use.
Present status:
Realtime tuning works well with J2534 pass thru wired interface (eg Tactrix OpenPort 2.0).
Flex fuel and realtime code works well for months on E92 N55 except physical flex fuel input not yet tested.
Simulated ethanol content sensor (using function generator) working with development hardware on bench through F series gateway to DME.
Wireless CAN transfer from browser on PC to and from bench ECU with development hardware.
Safety and MIL work compiles but testing on bench DME this week.
Hopefully will get prototype OBD boards in June. Finish the OBD device firmware over the summer.
Most of the challenges are solved, it is the crucial part of putting it all together.
Most of the work will be able to be used on many other MED17 vehicles and with the correct integration/partnerships the device is capable of flashing and datalogging at very high speeds - designed to be as fast as the CAN bus is capable of.
There was a pivot for me when the flex fuel input used on N54 does not work on late N55/S55 which has resulted in the new OBD device design - it was then rude not to make it capable of so much more and aim to replace the need for a J2534 device for realtime tuning.