Delinking of Cranks and wheel
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Delinking of Cranks and wheel
Chain-free bike by wire.
Would eliminate the need for any drive train maintenance. Ultimately might be simpler to build with fewer parts than regular e-bikes.
Could this be where E-bikes will eventually end up?
https://spectrum.ieee.org/emotor-chain-free-cargo-bike
Would eliminate the need for any drive train maintenance. Ultimately might be simpler to build with fewer parts than regular e-bikes.
Could this be where E-bikes will eventually end up?
https://spectrum.ieee.org/emotor-chain-free-cargo-bike
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I sure hope not. Says a lot for the mentality of ebikers if that's what they want. There's no way to feel the slope, or a headwind, or the terrain with your body. All you're doing is spinning a generator. Ugh. No physical input to the wheels. If I was a pedicab driver, I'd want one. But as someone who likes the feel of riding, might as well hop on q mpred and throttle around.
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I sure hope not. Says a lot for the mentality of ebikers if that's what they want. There's no way to feel the slope, or a headwind, or the terrain with your body. All you're doing is spinning a generator. Ugh. No physical input to the wheels. If I was a pedicab driver, I'd want one. But as someone who likes the feel of riding, might as well hop on q mpred and throttle around.
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The article didn't mention anything about thermodynamic efficiency - wonder how this compares to the chain and sprocket drive, which can be greater than 90% efficient. There are three changes here, from mechanical energy to electrical energy and back to mechanical energy, with losses at each step.
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The article didn't mention anything about thermodynamic efficiency - wonder how this compares to the chain and sprocket drive, which can be greater than 90% efficient. There are three changes here, from mechanical energy to electrical energy and back to mechanical energy, with losses at each step.
#6
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This company, Schaeffler, just has a good public affairs unit. Their approach might make sense for throttle drive cargo bikes with massive batteries where pedals are optional, but as johnin said, it's a very inefficient drive. Roller chains, which is what bike chains are properly called, are over 98% efficient, meaning 98% of the effort at the pedals gets to the wheels and then the ground. A generator motor set is unlikely to be even 50% efficient.
There's nothing new here except the hype.
There's nothing new here except the hype.
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My understanding is this is not how the pedaling will work. The controller will adjust the magnetic resistance of the crank based on the ‘gear’ selection and grade of the road much like a smart trainer so the pedaling will feel like a normal chain driven bike except the resistance is generated electronically rather than by a physical gear ratio or force on a chain.
The concept works in electomotive diesel engines and submarines. Engines spin generators to charge the batteries that spin the wheels and the props. Only works for a human powering a bike if the rider parks the bike and spins the pedals to recharge. Probably 1 hour of spin for 20 minutes of ride.
People have already tried this. Reviewers hated the ride, and especially hated that pedalling didn't generate enough current to spin the motor.
https://www.cnet.com/roadshow/review...ose-im-review/
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People have already tried this. Reviewers hated the ride, and especially hated that pedalling didn't generate enough current to spin the motor.
https://www.cnet.com/roadshow/review...ose-im-review/
https://www.cnet.com/roadshow/review...ose-im-review/
And initial prototypes and inventions are rarely prefect are they? I feel some of the reviewers complaints here will get improved over time with better firmware and better batteries will improve range. Remember Mavic's electronic shifting from the 1990s?
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One of the best parts of biking, including ebiking is when the derailleur clicks as you coast down a hill. You'll have to fake that sound with a speaker. LOL.
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