Investigating trigger setting for Lotus 6+1 trigger wheel.
- currently no camsync
Please see MembersPage/CustomExtraTooth
(but also similar to Honda extrapulse and shortgaptrigger below).
Config guidelines
NOTE: "trigger settings visual dialog in VT" is for missing tooth and coiltype, NOT for special trigger types. It is forbidden to use that dialog for special triggers, do NOT even open it, use the simple dialog.
Starting from Honda K20 (or rather Fiat Stilo but disable camsync; burn, reboot);
- ignition driver outputs=4
- nr of cyl = 4
- Extrapulse = enabled
- strig_validation=08 only extrapulse, nothing else (no cam_check_pol )
- Angular width of tooth = 60 deg (not 30)
- next trigger tooth (distance) = 3 (not 6)
- nr of tooth for full engine cycle = 6 when no camsync (not 12).
- reference tooth= 0 3 0 3 (not 0 6 0 6)... Neglect VT warning...
- advanced filtering=enabled (1/4 of values below will be effective, VT does not know but firmware does, sorry about it)
- normal rel min=94% max=194% ( 23.5% - 48% for extrapulse case ? So 3.1 ..30% will be considered SHORT, and detected as extrapulse)
- missing rel min=125% max=250% (32-62% for extrapulse case ? So 85..100% normal tooth will look LONG)
Relevant, but uncertain
- primary_trigger=1B
- rising edge (good for VR)
- secondary_trigger=43 (not 02)
- camsync disabled
after selecting Fiat Stilo => maserati special setting will be possible (non-greyed) (maserati_special primary_trigger)
- trigger after long gap => tried first...
- trigger after short gap makes little difference apparently
- cylinder separated spark delay = 0 0 0 0 (Please verify !)
almost
I found the settings i can read RPM, IGN driven, but the RPM is fluctating (0 30 0 30 cyl separated spark delay might have caused it).
Sounds like
- InputTrigger/ShortGapTrigger - The fiatstilo bit must be enabled for both primary_trigger and secondary_trigger.
- multitooth advanced filter (you can tweak these advanced filter tresholds):
- neglect longer gaps (150 .. 200% relative), and trigger on the shorter gap (appr 30 .. 34% relative).
primary_trigger=29 (decimal 41)
tooth_wheel=02
The following seems to be the key to get it work:
toothrel_normal=01 (normal tooth: 16 .. 100% Really tried 40..50% or so ?)
toothrel_missing=F0 (missing tooth: 125 .. 300%)
- nr of tooth on wheel=06 ? (full engine cycle=12 tooth)
- tooth_width = 60 crankdeg (angular width of tooth... NOT 180, of course)
- Next_trigger_tooth=03
- trigger tooth=01 (00 or 02 would likely work also)
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similar to Honda K20 2005+ but less teeth
I tried the honda k20 12+extra trigger settings but not read RPM, no ignition.
- with what changes ?
- Exact .vemscfg ???
Logs
- http://www.vems.hu/files/Norbitron/noadvfilter.vemslog with advanced filtering
- http://www.vems.hu/files/Norbitron/advfilter.vemslog -without filtering
- http://www.vems.hu/files/Norbitron/adv%20filter.vemscfg -vemscfg
Should be possible to configure (no firmware mod needed)
- InputTrigger/HondaFTwentyTrigger
- says the extrapulse is after the normal (10,20 not 20,10)
- also mentions 120, 120, 40,80, 120, 120, 120 which is similar pattern
- 60, 60, 15, 45, 60, 60, 60 is about right ? Please confirm, check triggerlog.
Or maybe
would be easier starting point ? Either way, just need some tweakinf anyway
To compare the exact position of the extra pulse to TDC is very hard because the engine is rear mounted.