About an old vag-1.9tdi engine to make project with arduino engine control as the only ecu.
I found more than 10 years old topic of this subject, that is closed, no download/sharing possible, but would be great to found some, what might be working on subject.
What is the function of an ECU on an old Diesel engine? What is a vag-1.9tdi engine?
1 Like
Welcome, interesting project, I recognize it as the emblematic representation turbo diesel from Volkswagen. I hope it is just a lab experiment, if in a vehicle/equipment a lot of the parameters change. Answering @Paul_KD7HB question will help us help you.
Injection governor, to set min, max, exact rpm. Would be good enough to get/set 2000rpm, that would be great!! (It seems to be difficult with VAG stock firmware)
I'm not up to manage injection timings, air flow, pressure etc. - it's not my interest.
Yes Paul, it's vag-19.tdi.
I suggest next you get your arms around all of the sensors/actuators involved and understand how to read/control them. Past this point I cannot be of much help.
1 Like
You seem to think a SINGLE microcontroller is doing all that work.
I guess, that easier would be have a separate controller to count RPM. Single Adruino loop might not be able co count precisely.
Normally RPM is counted in interrupts and computed in the loop().
Many of the ECUs (Engine Control Units) had 16 bit processors in that time-frame with special hardware. One of them from the Detroit area I am familiar with had spark, injectors, etc all on one processor. This limited the RPM to a bit over 5K initially. The ECM also had (LHF) Limp Home Feature, this allowed the vehicle to run so it could get repaired. During this mode environmental parameters were ignored as it was a short term thing. If you know where TDC (Top Dead Center) is and which 1/2 of the cycle you can control just about everything. The starter motor by spinning the crank allows the sensors to align the controls. The RPMs (Revolutions Per Minute) do not really change that fast. Use your search engine and look for "EECIV" You can also check "ECM", The first is Gas the second is Diesel. Good Luck
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.