ElectricMotorcycleForum.com
Tech => Tech Help => Topic started by: BillyJ on November 20, 2014, 07:54:46 PM
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Hi there,
First post here :D
I was wandering if anyone knows where I can source a CVT drive from for an electric motorcycle. The bike hits peak power at about 50-60KW, and runs at about 100v when fully charged.
It's geared for top speed, about 100mph but starts really slow, a CVT would start me off very fast 8)
Thanks in advance!
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Perhaps you could source a CVT drive system off of a crashed scooter in a junk yard. Considering how many crashed scooters there are in the world there ought to be a lot of cheap drive systems to choose from at a large motorcycle breaker's yard. I imagine that the CVT is about the last thing to be inoperative when crashing a scooter. ;)
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Perhaps you could source a CVT drive system off of a crashed scooter in a junk yard. Considering how many crashed scooters there are in the world there ought to be a lot of cheap drive systems to choose from at a large motorcycle breaker's yard. I imagine that the CVT is about the last thing to be inoperative when crashing a scooter. ;)
Something like that's never going to be able to handle 60kW, which is about 80 horsepower.
Just curious, BillyJ, what sort of ride are you talking about? Something you cooked up yourself?
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Well, Aprilia makes an 850cc motorcycle using a CVT drive. However, they are not too popular and it might be hard to find one at a junk yard. Also, there are several 650cc maxi scooters on the market, such as the Honda Silver Wing, Suzuki Burgman and BMW scooters that could handle that power and top speed. The Suzuki and Honda have been around for a while and their parts could be more available at a salvage yard. Alternately, maybe a manual transmission from a crashed IC motorcycle might be the less expensive alternative to your gearing issue.
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Search for snowmobile cvt, there are units available for this kind of power.
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The Sora Electric Motorcycle from Lito Green Motion are using a CVT transmission
Doc
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Firstly, thanks for all your replys!
I will look into some maxi scooter CVTs good idea ;D
If anyone had any links for places selling, even links to new CVTs that aren't for a specific vehicle that would be great! (In the UK or can ship to UK would be even better ;) )
Just curious, BillyJ, what sort of ride are you talking about? Something you cooked up yourself?
Built for racing with a university team and I'm trying to push them into CVTs rather than using direct drive as from a standing start it has the speed of a 125cc bike and all the torque is really at 60ish mph upto 100mph.
EDIT:
Do you not think that a 250cc CVT could do it?
I was wandering this earlier and wasn't sure if the CVTs rated power is for the part where the ratio is changing only or for that and the part where the CVT has reached it's max ratio?
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Use a comet cvt if you do use one... Made for high torque.
Still cvts are inefficient and not well suited to the high torque and low rpm of a motor when it first starts. The shift points for a centrifugally engaged cvt are a bit off. If you can find something where you adjust it mechanically like maybe Bergman then maybe it'd work.
Still lots of complexity and space that could be used more efficiently by just getting a larger motor that doesn't need a transmission.
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I've considered using CVT for a lot of my projects, but I always end up turning the amps up instead. Are you building for MotoE?
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