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15 minus 1 trigger installed on Inline 5 Audi engine
Primary trigger is a 15-1 (yes, missing tooth!) crankwheel with [GT101 HALL sensor]
(which pulls down when it detects ferromagnetic material and leaves the signal high in the gap, as pulled up by the pullup resistor).
- either falling or rising edge is OK with this, but falling is "sharper", so
- primary_trigger=10 # (decimal 16); which means
- falling edge
- multitooth
- no filtering
- advanced filter off
- N-1 (N minus 1 active!!!)
The falling edge (metal coming in) right after the missing tooth is 2 teeth+60degs = 48 crankdeg + 60 crankdeg = 108 crankdegrees BEFORE TOP DEAD CENTER (Cyl 1 ?).
Secondary trigger (HALL)
Pulse (falling or rising edge?) is set 10deg BEFORE primary trigger missing tooth.
- trigger_tooth=02 # 00 .. 03 might be candidate, a good variable to play with
- another_trigger_tooth=06 # next trigger tooth; 06 for sure
- ign_tdcdelay=78 # (decimal 120) ign TDC-delay: 60deg ; should be fine first, adjust for good base timing when it runs
- normal tooth width=1
- missing tooth width=2
- reset_engphase_after=1e # engine phase when to reset=30
While we were lucky enough to get the engine running with totally misconfigured values (another_trigger_tooth=03 and reverse sequence ;-), it was running really poor and showed 2x higher RPM (than real).
firmware version= ... ?
Both mcd and mct are important to reproduce.
mcd
- alternate=04
- ignchmax=04
mct
h[2]=01 00 02 04 03 .. .. ...
- ign sequence
- ignch1 cyl2 doesn't fire
- ignch0 cyl1 doesn't fire
- ignch2 cyl3
- ignch4 cyl5
- ignch3 cyl4