InputTrigger/ShortGapTrigger

This was originally supported in 1.0.x only.


1.1.x firmware notes

Now also supported in 1.1.x starting with 1.1.72


Firmware 1.0.x config for trigger family, where we sync on the short gap (instead of the missing tooth bigger gap):

The fiatstilo bit must be enabled for both primary_trigger and secondary_trigger.

Worked with an earlier firwmare with fiatstilo style cam. Totally reworked so basically any reasonably cam pattern is supported (setting another_trigger_tooth) Tested with 1.0.68 firmware, 4 cyl wasted spark subaru trigger setup. (1.0.75 or latest release recommended)

examples:

As you see, we neglect longer gaps (150 .. 200% relative), and trigger on the shorter gap (appr 30 .. 34% relative).

Primary trigger settings

secondary_trigger

If you have a distributer, disable (secondary_trigger=02).

Without distributer, camsync is needed! GenBoard/Manual/InputTriggerCamSync but there is something special about the implementation, so it is easiest to set at least the missing tooth toothwidth to 0. (there can be several working setup).

secondary_trigger=59 (decimal 89)

that is enabled, strig_camsync, coil type, rising edge

  uint8_t secondary_trigger;    // trigger2, bit0 0:falling/1:rising, bit1 0:enable/1:disable, bit2 1:filtering, bit3 0:toothwheel/1:coil, bit4 0:alien advance/1:cam sync, bit5 1:both edge at cranking bit6:fiatstilo

Tricks:

The another_trigger_tooth refers to the cam_counter, that is we cam_sync after the 3 consecutive camtooth seen (see InputTrigger/SubaruTrigger). Set to 01 if you only have 1 camtooth.

Investigation at MembersPage/SkassaTriggerSubaru: another_trigger_tooth=03 might interfere with ignadv actuation ?


No surprise (4 cyl):


Trigger Settings

The following settings can be used to default the Subaru/Fiat Stillo trigger settings.

You will still need to adjust the ign_tdcdelay (TDC after the trigger in MegaTune) to tune the ignition advance.

primary_trigger=29
toothrel_normal=01
toothrel_missing=F0
tooth_wheel=02
trigger_tooth=00
another_trigger_tooth=03
secondary_trigger=59
tooth_wheel_twidth1=00
tooth_wheel_twidth2=00
crank_minper=00
cam_sync_r_edge_phase=00
cam_sync_f_edge_phase=00
reset_engphase_after=04

Other trigger wheels that fall in this category

Someone pasted this link on irc:

VR.jpg

This looks like a variant of the "short-gap-trigger", should be possible to make it work with 1.0.x + proper configuration and benchtesting. We will help the setup after he makes his MembersPage.


Toyota Supra and Celica trigger Hardware