Comment on Tesla confirms it has given up on its Cybertruck range extender to achieve promised range
XeroxCool@lemmy.world 6 days agoHow do you figure dual front motors would alleviate any of what you said a front diff would need? Dual front motors will still be rigidly mounted to the chassis, requiring flexible couplings. The rear is also independent, requiring the same flexible couplings whether it’s a diff or motors. CV axles all around.
acockworkorange@mander.xyz 6 days ago
You wouldn’t need a front differential, for one. But you’re right, unless they somehow made a directly wheel coupled motor that turned with the wheel, it l still needs CV couplings.
As for rear, they don’t need CV axles. Two simple cross couplings are enough. The speed variability happens significantly when the wheels turn, going up and down is a negligible issue. Cars have been using the much chapter and simple cross couplings in the rear for decades.
_stranger_@lemmy.world 6 days ago
The CT has four-wheel steering, so yeah, it’s actually more complicated than a regular truck in that regard. I remember reading something about the mechanisms to make that possible taking up a shitload of room.
acockworkorange@mander.xyz 6 days ago
Oh yeah, forgot about that. They had to bolt that on to have any chance of having a reasonable turn radius.
XeroxCool@lemmy.world 5 days ago
Look under any RWD IRS passenger vehicle and you’ll find nearly every single example uses CV axles, not u-joints. U-joints have famously irregular speed variation as the angles change in steady rotation, so the constant velocity joint is far more common for the half axles