Except for that janky tensioner; I like the Canyon best.
Looks like it was knocked up with 48hours notice. Is there even a legit Avinox MG in there?
I would hope there's a redesign in the future.The tensioners look like a liability from here. Maybe I'm wrong and it's not as exposed as they appear?
We aren't privy to the decision making processes and should show some deference to those who design motor systems for a living. It's entirely possible the gains you're theorizing are so minuscule that there's more value in the wider ratio.
Tensioners are the bane of MGU and gearbox designs. I've harped on this for quite some time and its problem that needs to be solved along with the motor tech. Villeger Dynamic a couple of years back (nothing from them since) has a ECVT motor design with integrated tensioner optimized for the motor - a cool concept.The tensioners look like a liability from here. Maybe I'm wrong and it's not as exposed as they appear?
That's why it's the best looking for me, at this point. I'm sure they'll be refined. Canyon just grabbed something already on the market and Forbidden/Mondraker found some scrap metal laying around the shop.
This is not how e-cvt works. It uses 2 electric motors and a planetary gear to create a variable ratio between the inputs and the output. Works very well in hybrid cars, some e-CVTs were implemented around 20 years ago.
The degraded modes of the motor will depend on the design internals. The way ECVTs work is the gearing motor (not the drive motor) runs at a particular speed to set the ratio between the sun and ring gears or between the planetary and rings gears (depending on implementation). It's bit like virtually making either ring gear larger or the planetary gears smaller to increase the gear ratio. If the motor dies then what happens depends on what happens to the planetary gear when the gearing motor dies. If its nearly free-spinning then the gear ratio would tank, perhaps close to what it feels like when you would be in the granniest of granny gears. OTOH if the motor locks the planetary gears, then the sun gear would drive the ring gear (or vice versa depending on design) directly, and you probably get a very high gear ratio (but this too depends on design, based on steady state rotational speeds of both the drive motor, gear motor, and the gear sizes of the planetary setup).
Pretty much, you can use one of the motors as a generator to power the gearing but it's likely to feel super draggy in all but the native gear (where the sun is stationary), and even then pretty bad. BUT assistance could be set to taper off as the battery gets low to mitigate this.
Cute. Keep in mind there is no internal clutch to disengage the motor train from the pedal train (i.e. no float). The pedal axle is always connected to planetary system with ECVT. It would just be planetary gear backlash felt, so probably not a future glaring issue.
Really ???
