JBee
Well-known member
- First Name
- JB
- Joined
- Nov 22, 2019
- Threads
- 18
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- 4,774
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- 6,148
- Location
- Australia
- Vehicles
- Cybertruck
- Occupation
- . Professional Hobbyist
well, presumably the TeslaVision will prevent (e.g.) the CT back end grazing a car in the lane to your right when you're making a left turn...!
The rear track will follow the front track and so the rear of the CT will not veer right when turning left.Rear steering makes a lot of sense for a vehicle with regular software updates. It hasn't really been done until now because it's surprisingly hard to control (getting it right for everyone, etc. ). I foresee some complaints no matter how well done it is lol...
As far as mechanical engineering goes, it's really not hard since this technology has been figured out for a long time. But CONTROLLING it is where it'll bite haha.
For example:
sure, tighter turns are great! But the rear tires angling outwards adds new collision possibilities. Since the turning radius can now start at the rear of the vehicle, rather than only pivoting around the rear axle, we're going to see a lot of folks "side driving" into things haha. It'll be important to understand that when you aim to turn left, your rear tires will be aiming RIGHT.
Good control and software can certainly fix this (and other weird cases) and make it amazing! It'll be interesting to see how Tesla implements all this.
I'm stoked!
Cheers!
The rear wheel turning angle will only be a fraction of the front wheel turning angle, because the rear wheel fender is not big enough to allow more angle without making the bed width smaller. I expect it to be around 10-15 degrees of turning on the rear.
No need for FSD to intervene on 4WS. There are many cars with 4WS, and most do it mechanically without any software, and they all work fine. I don't think there is a need for software updates, actually I would consider updating the steering behavior via software a risk as people will not expect the change. The only place I can think where software (and updates) might play a roll is in fringe cases or emergency situations, where it assists ABS/ESP etc to maintain control of the vehicle. Even there, it would be in Teslas best interest to have that onboard prior to production rather than an update late on.
This is not new tech there's a bunch of BMW, Merc and Porches etc that have it. Even GM.
Here's a video I found on on another thread here that demonstrates it well:
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