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Tesla Cybertruck
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wraper:

--- Quote from: langwadt on December 03, 2023, 09:25:15 pm ---
--- Quote from: wraper on December 03, 2023, 09:21:57 pm ---Steer by wire is not the same as active steering at all.  Also Cybertuck turns both front and rear wheels. Rear wheels actually turn in different direction depending on speed.

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Honda Prelude had four wheel steering 35 years ago

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Did it do the same as what I wrote? At low speed Cybertruck rear wheels turn up to 10o in opposite direction from front wheels. At high speed they turn up to 2o in the same direction as front wheels.
Benta:

--- Quote from: wraper on December 03, 2023, 09:21:57 pm ---
--- Quote from: Benta on December 03, 2023, 08:32:25 pm ---
--- Quote from: AVGresponding on December 03, 2023, 05:41:45 pm ---
--- Quote from: schmitt trigger on December 03, 2023, 04:41:47 am ---
Drive by wire, for instance, allowing to tailor the steering ratio depending to speed.


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This has been tried before, and does not work. The reason should be obvious to anyone that's ever driven a vehicle. The closest to variable steering that actually works is the various 4WS systems the Japanese manufacturers used in the 1980s-1990s. Curiously they don't bother any more.

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Strange statement and wrong.
My 2005 BMW 330i (E90) had active steering and it worked perfectly, I enjoyed it. The 5-series had it even earlier. It's a standard option not only offered by BMW (I think, didn't check other brands).
https://en.wikipedia.org/wiki/Active_steering

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Steer by wire is not the same as active steering at all.  Also Cybertuck turns both front and rear wheels. Rear wheels actually turn in different direction depending on speed.

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I never said it was. Please read what I responded to. Which was:
"The closest to variable steering that actually works is the various 4WS systems..." which is nonsense.
Drive-by-wire is something else (and something I'd never want, but that's a different subject).
bdunham7:

--- Quote from: wraper on December 03, 2023, 09:37:24 pm ---Did it do the same as what I wrote? At low speed Cybertruck rear wheels turn up to 10o in opposite direction from front wheels. At high speed they turn up to 2o in the same direction as front wheels.

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Yes, the Prelude 4WS went both ways.  It was also completely mechanical and didn't have 10 degrees of authority (I think it was 5 or 6), but yes it shortened the turning radius in parking lots as well as improved lane change maneuvers.  My Mitsubishi 3000GT VR4 also had 4WS, but it only worked same-direction and at higher speeds.
wraper:
I found a video where it does some weird oscillation on rear wheels when changing steering direction.

HalFET:

--- Quote from: langwadt on December 03, 2023, 08:00:10 pm ---
--- Quote from: tom66 on December 03, 2023, 07:54:32 pm ---I really hope it doesn't come to the UK/EU.

We have enough problems with people driving ridiculously oversized vehicles and killing pedestrians and cyclists in avoidable accidents.  Not to mention small roads, cramped car parks... seeing someone maneuver this around a normal multistory car park would be a sight.

The SUV was a cursed invention, I really wish it had never been a thing.  Massive trucks like these as personal vehicles is just taking that to the next, most ridiculous level.

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hasn't "Pedestrian Detection and Collision Mitigation Systems" with automatic braking not become mandatory yet?, I know it's been proposed so it won't be long

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In most of Europe, yes, I believe that was part of the same package that made a reverse camera mandatory.
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