MembersPage/Fero/MitsubishiEVO (2011-05-04 10:42:38)

Mitsubishi EVO VI-VIII

My plan is to use the stock trigger system. It is important because the race rules don't allow to modify it and mitsubishi EVO-s are more than 90 percent of the racecars here. It's a very big market.

Here is the stock crank triggerwheel. It has two simple big 67 deg tooth, The rising edge of the tooth is about 67-70 deg before TDC:

crank1.jpg

crank2.jpg


And here is the problematic cam trigger: a bigger and a smaller tooth, I don't know the exact TDC position yet => The position would be VERY important. A scopeshot (both triggers) would help a lot:

cam.jpg

Please measure the positions. It is possible that the big camtooth "overlaps" the crankpulse rising edge, while the short camtooth not. In this case we can make a simple (2-line) filter in the cam-trigger-code to filter out the small tooth. Otherwise it's a bit more complex, but let's see first.

Maybe the multitooth bit in the config.secondary_trigger could be used for this (actually seems like a good place, not currently used).

MembersPage/PhatBob - Rob Van Asbroeck has this engine running on simple trigger with one of the cam teeth removed.

Triggerlog from evo3, one with rising, one with falling edge for cam sensor: http://media.vems.se/mitsu/