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CVT Torsion Spring rates

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JJ1990 View Drop Down
Double Secret Probation
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JJ1990 Quote  Post ReplyReply Direct Link To This Post Topic: CVT Torsion Spring rates
    Posted: Sep/19/2017 at 1:21pm
Hi. I am currently working on a simulator for a Comet 780 series CVT, which uses three torsion springs on the primary clutch. 

What I cannot find anywhere is the spring rates of those torsion springs. I have seen several charts that show the engagement rpms for different weights-springs combinations, like this one. It shows the colour code of each spring, but not the spring rate (which is necessary for my simulator). 

Thank you


uploads/4476/Engagement_chart.png
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Bantu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bantu Quote  Post ReplyReply Direct Link To This Post Posted: Aug/22/2018 at 1:18pm
Hi I am from South Africa. I am working on the same Cvt, my aim is to optimize the Cvt for better acceleration. My question is, how do I make the sheaves to move in and out? How do I make the belt to go up and down as the sheaves moves in and out?
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RLM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RLM Quote  Post ReplyReply Direct Link To This Post Posted: Aug/23/2018 at 8:15am
springs, weights, and physics. out of the box, the CVT will operate properly, though not optimally. it is up to ou to tune it. there are a ton of resources on this forum on CVT tuning. there are also several books out there. Hint: They are also commonly referred to as clutches and are used quite a bit in ATV's and in snowmobiles.
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