MembersPage/FPhil/CoilTypeOddFireConfig (2011-05-20 09:50:07)

Ignition parameters for odd fire coil type configuration.

As I understand, the Marelli microplex logic for starting the ignition is:

On CamTooth 1 START COUNT Crank teeth
On CamTooth 2 If CrankCount=2 then START IGNITION, (next cyl. is c2 90° from here

In software they simply made a switch for the 12 cases

given by the 12 teeth met in a 720° cycle. Also they simply put a

constant 120° dwell time since there is always 120° (that is 30°+90° or 90°+30°)between the 2 previous teeth and the firing tooth. See here after

BLEU : IgnitBiturbo1000.wav - JAUNE: IgnA - VERT IgnB

microp10.jpg

microp11.jpg

Question

Lets note the 6 tuples of 2 crank teeth which are seen by the VR sensor during a double revolution of 720 ° by the following:

/t01/.30°./t02/ .. 90°.. /t03/.30°./t04/ .. 90°.. /t05/.30°./t06/ 90°

/t11/.30°./t12/ .. 90°.. /t13/30°/t14/ .. 90°.. /t15/.30°./t16/ 90°

Indeed cylinder numbering is not useful at this bench test stage. Although things are more involved we just want to exercise the VemsTune capabilities as a first attempt and observe with a scope what's coming out.

So lets us ask Genboard to fire 10° before the following teeth

/t01/ ..... 150° .... /t04/ .. 90°.. /t05/ ..... 150° ....

/t12/ .. 90°.. /t13/ ..... 150° .... /t16/ .. 90°..

1.1.90 with option Maserati for the triggers does not seem to configure events h[1] and ign output h[2].

What are the options to set from the VemsTune menus?

Can we do odd firing with coil type triggers? How?

The config used the individual cylinder spark delay.

Anyway I don't even know on which crank tooth Firmware 1.1.90 start counting. I should make a triggerlog next time.

So that we can help with ignout config that matches your wiring, fill this in:


Inj outputs - same order as ign

Use the same injout entry as the ign (if topmost ign is, say, cyl3, topmost inj should be also cyl3 output for unbiased inj-angle positions).