Cc can you still do a burnout with these? It looks kind of fragile.
Have you ever looked at a gearbox?
Hyundai Uni Wheel electric drive system could revolutionize EV design
41–50 of 192 posts
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#42I honestly thought that Tesla made a version of their sedan which had 4 motors -- one for each wheel. When I looked into it, all I can find is that the CyberTruck should have 4 motors. Wasn't there a quad and duel version of the sedans -- what are they referring to?
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#43FWIW, there was recently a now-defunct car company (Lordstown motors) that utilized an in-wheel motor from the company Elaphe ( https://in-wheel.com/en/technology/#in-wheel-motor-technolog... ) I think the tradeoff is between more flexibility & fewer parts (no cv joints) but possibly more rolling resistance. But watch the video, this uni-wheel thing is different. It isnt an in-wheel motor, more of a cv-joint alternat…
Yeah, it’s not a hub motor, so the unsprung weight should be a lot less.
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#44Seems like it's only in-plane motion, so the wheel can't tilt/turn? I assume that means they still need a CV joint for the front wheels regardless, and that it gains no camber when cornering.
Most likely they will have a ball joint (like the current inner CV Joint shaft has) on the end of the shaft that connects to the device in the wheel hub.
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#45Correct me if I’m wrong here but this is just sort of an alternative to a cv joint, sort of because it can’t handle rotation. It also has nothing to do with EVs specifically, a ICE could use this.
An ice could use this but there is no real purpose. The whole goal was to make the electric motor smaller and closure to each wheel so there is more room for other things.
Yeah fair, though ICE cars also benefit from more space. Maybe I’m just salty because I had to watch 10 minutes of their video just for a clip that was about 1s long that actually shows what it is instantly, they should have lead with that…
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#46I honestly thought that Tesla made a version of their sedan which had 4 motors -- one for each wheel. When I looked into it, all I can find is that the CyberTruck should have 4 motors. Wasn't there a quad and duel version of the sedans -- what are they referring to?
They have dual and triple, the triple (Plaid) has two motors on the rear if I remember correctly.
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#47The thing I see not mentioned in the article/video, is how the wheels can tilt/turn/angle - without needing a CV joint again.
The designs seems to cover all the motion of the wheel in the suspension - but I don't see how this could accommodate steering.
Is this for back wheel drive only?
Curiously the animations shown in the video, show the uni wheel used in the front of a front wheel drive car - but without ever showing how the wheels steer.
How is that supposed to work?
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#48How do they keep this clean? A CV boot is compact, flexible, and fixed to the shaft. What kind of dust shield can cover the big vertical gap and handle a spinning shaft?
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#49Unsprung weight is a clear disadvantage to the solution. It will significantly affect ride quality, no way around that. Those planetary wheels look more fragile than the traditional solution. You also need to keep that entire thing closed and lubed as well and even so it looks like added friction, wear and a more expensive repair job when it goes bad.
All that being said it could be a good niche solution. A small city car would benefit from the space savings and does not need to go high speeds over less than perfect roads. Nor does it rack up that many miles in wear and tear. In general I think electric will bring more diversity in car designs depending on purpose.
Re: Hyundai Uni Wheel electric drive system could revolutionize EV design
#50Unsprung weight is a clear disadvantage to the solution. It will significantly affect ride quality, no way around that. Those planetary wheels look more fragile than the traditional solution. You also need to keep that entire thing closed and lubed as well and even so it looks like added friction, wear and a more expensive repair job when it goes bad. All that being said it could be a good niche solution. A small cit…
> Unsprung weight is a clear disadvantage to the solution. It will significantly affect ride quality, no way around that. Those planetary wheels look more fragile than the traditional solution. You also need to keep that entire thing closed and lubed as well and even so it looks like added friction, wear and a more expensive repair job when it goes bad.
But uni-wheel changes paradigm!