Members Page/Emil Malmsten/Audi S - VEMS wiki www.vems.hu

MembersPage/EmilMalmsten/AudiS (2006-03-16 04:43:08)

Trigger setup for Audi S4, 5cyl Direct Fire engine

Primary trigger is VR 60-2 multitooth
Secondary trigger is a hall sensor, 10-20 Deg Slot fully adjustable (mockup distributor)

What is the best way to configure this ?
- firmware modification, done in 1.0.25 (ready for testing)

If we set another_trigger_tooth to 12 (5 per crankrot), and extend the h[2] table to 10 cells, and set dummy values every second cell, also for injectors, divider=02. I guess it would work?
- it would work, but with current stable firmware dwell-time would be limited at high RPM. In short, not a good solution.

Config http://linkopingsmotorsport.se/config.txt
- make sure you publish actual config (output of mcd) also, not just the intended config. If you mess up global.h (eg. using an old version, forget to update config.mtt file, whatever) this reveals the truth.
Tables http://linkopingsmotorsport.se/tables.txt
Datalog: http://linkopingsmotorsport.se/datalog200511141121.xls
- if this is sure not captured with primary_trigger=coil-type config (which results in 24x higher RPM than actual, as in the log), than try http://www.vems.hu/files/Firmware/release/v3_firmware_1.0.25.zip we suspect a syntax thingie in 1.0.24 that could result in coil-type being activated

1.0.25 + MT r027

Config http://linkopingsmotorsport.se/config.txt

Notice drop in RPM, engine never catches up

TODO:

find cases when RPM drops (trigger error), and find out if anything special happens there (like actuation of a misc output)

Possible causes

VR waveform shape
- see InputTrigger/RunOut
- can you record (and publish) the measured VR waveform (at idle-RPM is OK), either with
  - [picture] [wav-file]

onboard circuit
- unlikely. But tell about ECM history. Board version, serial Nr, assembled by, ...
ground
- see MembersPage/PhatBob/UserGuide
other
- unlikely

See also