MembersPage/Suzuki36-2-2 (2022-02-07 21:34:43)

36-2-2 Suzuki trigger implemented 2022-01-16 in VEMS firmware (1 day after trigger specification completed).

However, was originally specified wrong .... as tradition for 36-2-2-2 (was also specified wrong imitially).

Signalgen, trigger detect firmware mod, release, configlet, testing done according to the specified wrong pulsetrain.

The actual is:

trig04_camsync.png

Needs rework...


[trigger configlet] needs strobing or scoping, adjust tdcdelay and all the usual install stuff.

Syncs and continues to ignite

VEMS_Suzuki_M16_factory_36-2-2_trigger_2022-01-16.png

Should be possible to configure also to non-factory 1 pulse camsync (if chosen edge pulse position is not very close to end of missing tooth).


Primary trigger pattern

Suzuki m16 Euro5 engine from 2012 trigger is

36-2-2 (=32 teeth total) :

Suzuki36-2-2_Euro5.jpg

Bottom pic is Euro4 Suzuki 36-2-2-2 , a known existing variant

(already fully supported, configlets available) MembersPage/SuzukiThirtySixMinusTwoMinusTwoMinusTwo

which has

That is 30 teeth total, 36-2-2-2 as we usually call.

Mounts on the same crankshaft (orientation fixed by the drill at 3 degree) but it is a LOT of work to replace, (whole engine disassemble work)


TODO: exact details

If the trigger pattern is known exactly by degree, including camsync, it can be implemented


Sectrig pattern, 4 groups (90deg = 180 crankdeg) is SAME as 36-2-2-2

It is possible to grind off teeth from the camwheel.

Suzuki36-2-2_primtrig_and_1_1_2_2_sectrig.png

SuzukiM16A_36-2-2_primtrig_and_1_1_2_2_sectrig.png

NOTE: camwheel image contradicts "scopeshots" (and drawing) regarding the width of first tooth of the double campulse.

Most likely the sectrig falling edges are inside the tooth-runs (either 1 or 2 falling edges, depending on cam position).

Suzuki_M16_36-2-2-2_camsync.png


(2022 or newer) Signalgen z342 . please check wav in audacity and compare with your real scopeshots (provide your scopeshots or triggerlogs)

Suzuki_36-2-2_M16_signalgen_z342_primtrig_and_1_1_2_2_sectrig_camoffset12.png

Check where the double campulse hugs the 36-2-2-2 single missing => it is fully inside the short (10 teeth) run of the 36-2-2 because of the different positions of the primtrig missing tooth.

(Suzuki assumedly changed the crankwheel so that initial syncup at cranking can be a few teeth faster with sophisticated code.)

2022.02.07. Question: How can I set this trigger without camsync? It is available default pattern, or should I set some special? Thanks, Roland

I did triggerlog with a configlet from Marcell.

swift_trigg03_scope.png

trig07_camsync_clet.png

http://www.vems.hu/files/MembersPage/Suzuki36-2-2/trig_07_camsync_clet.wav

http://www.vems.hu/files/MembersPage/Suzuki36-2-2/v3.3_u022060-A-2022.02.07-13.28.53_trigg_camsync.vemscfg