Post by
amc49 »
https://forums.nicoclub.com/amc49-u275146.html
Sat Mar 17, 2018 11:11 pm
I strongly suspect the issue is one I have guessed at in other posts, the inability of a CVT chain to move over sprockets while the pulleys are barely or not turning. When the pulleys are not rolling then the chain cannot adjust massively to where needed as it needs the pulleys to roll to allow that to happen. It's a CVT thing and nothing one can do about that issue in and of itself, the pulleys MUST roll at least some to allow a big change in the chain drive ratio. Maybe the software is an issue there in some way.
The same issue is present in industrial uses of CVT drives, there they strongly tell you never to adjust the pulleys with the motor (driving them) stopped, it will result in skidding damage to the drive belt (chain) and pulleys.
A sudden quick stop as in an emergency would classify as that situation, the chain would be locked in the as running ratio as it did not have time to readjust and the trans would have to roll slowly at first until the biggest part of that is done. Doesn't take but a second or two but it's there, a normal stop provides enough time to quickly adjust.