VEMS Home Products Documentation Wiki Webstore
WikiHome ProjectPage DocsPage UnderDevelopment MembersPage SiteIndex RecentChanges Preferences
MembersPage/FiatStilo (2006-03-16 04:43:08)

This project is in a serious hurry, since they want to race on Oct 12, but the trigger is not supported yet !!!

First we need to find out the trigger arrangement.

So it's VR, with gaps:

degrees. The multitooth.c code should fire a "trigger_tooth" (with the assumption we are 70 degrees BTDC) when the gap=30 degrees is detected. This is not very complex, actually very close to what the multitooth.c tooth_relative_length() ( which is called "multitooth advanced filter", that I use on my daily driver, probably noone else uses it at the moment), it might just take a tiny change and matching config.

Fiat_stilo_cranksensor_90_30_60_degree_m.jpg

Correct trigger drawings:

stilo_drawing.JPG

As you see, the trigger tooth is 70 deg BTDC. And there are two other tooth. So the trigger tooth must be the tooth that is approximately 30 degrees(and +/- some degrees hysteresis)distance after any other tooth. Unfortunately i didn't see the wheel myself. The guy who made the engine has took this photo, and the drawing. And i've checked it with him on phone. So i hope that the round direction is good.

Actually, this is the only arrangement and direction that makes sense: inter-tooth gaptimes of 60,90,30 degrees, and trigger-tooth being after the 30degrees gap.

Nice!