Okay, so they took a regular scooter CVT mechanism, shrunk it down, and found out that it can't transmit enough torque. To combat that, they simply geared the input up and output down, so the belt travels faster and can transmit enough power. I'd imagine that comes at a great efficiency penalty, I'd be really interested in the efficiency. Love the design, would buy if efficiency is >90%
It does not make any sense. because humans have a very low ability to spin the pedals, in other words, they cannot make a high rpm. Pratically the torque of a human biker is: - almost costant at any rpm - enough to start and keep the bike moving by constrast it does not have a basic requirement of a cvt: - no high rpm required to make the cvt work due to centrifugal force so they multiply the rpm by a gear but this involve some mechanic loss. now considering the limited power of a human power such loss is something unacceptable
@@eddyb2850 Thank you. The Prodigy V2 uses a toroidal CVT with a relatively limited overall gear ratio (380%). The one in the illustration is a Reeve’s type CVT which could, potentially have a much greater overall gear ratio.
Thanks! It is an actual product, different proto's have past, not sure if it is in mass-production already. Ask the guys from RatioX ( ratiox.ch ) Also the technical specs are on their website.
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Okay, so they took a regular scooter CVT mechanism, shrunk it down, and found out that it can't transmit enough torque. To combat that, they simply geared the input up and output down, so the belt travels faster and can transmit enough power. I'd imagine that comes at a great efficiency penalty, I'd be really interested in the efficiency. Love the design, would buy if efficiency is >90%
bro literally tell me in which regular bike there is 90% efficienc you trippin
It does not make any sense. because humans have a very low ability to spin the pedals, in other words, they cannot make a high rpm. Pratically the torque of a human biker is:
- almost costant at any rpm
- enough to start and keep the bike moving
by constrast it does not have a basic requirement of a cvt:
- no high rpm required to make the cvt work due to centrifugal force
so they multiply the rpm by a gear but this involve some mechanic loss. now considering the limited power of a human power such loss is something unacceptable
Great animation. Is this an actual product, or even gone to prototype stage? What is the overall gear ratio? thanks.
The Prodigy V2 has the option of a CVT
@@eddyb2850 Thank you. The Prodigy V2 uses a toroidal CVT with a relatively limited overall gear ratio (380%). The one in the illustration is a Reeve’s type CVT which could, potentially have a much greater overall gear ratio.
Thanks! It is an actual product, different proto's have past, not sure if it is in mass-production already. Ask the guys from RatioX ( ratiox.ch ) Also the technical specs are on their website.