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| Tesla Cybertruck |
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| SiliconWizard:
Yep. Of course not everyone has the same idea of what predictable is. Which makes sense as we don't all expect the same behavior based on our experience and preferences. So a better word than "predictable" here, for describing a calculator-assisted steering, would be "standardized". IMO. If you're used to a given vehicle, even one without any steering assistance whatsoever, then its behavior will be entirely predictable to you, unless something breaks. So it's more like giving vehicles a more "standard" behavior that's more approachable for most drivers. |
| vk6zgo:
--- Quote from: wraper on December 03, 2023, 12:38:26 am --- --- Quote from: .RC. on December 03, 2023, 12:27:48 am --- --- Quote from: DavidAlfa on December 02, 2023, 10:23:55 pm --- It starts crushing nicely... but then hits the rock-hard, rigid chasis and the occupants go ballistic, the vehicle even bounces back and hits them harder. --- End quote --- That is all OK, because the batteries will then catch fire cooking the occupants who can not escape anyway. --- End quote --- Except EV catch fire way slower so chances of escaping are higher and it happens 10+ times rarer (per same number of units) than with ICE vehicles. You don't see ICE vehicles on fire in the news because it happens so often that it's too mundane. Also Cybertruck has manual door release, the same as other Tesla cars. --- End quote --- ICE cars bursting into flames after accidents was so rare in earlier years that we used to sneer at Hollywood movies showing that happening. Wrecked cars commonly looked like a giant had stepped on them like we might on a tin can, but no sign of fire. These days, it is so common that it is almost routine. It seems nobody has connected the dots! My theory is it is because of the presence of pressurised fuel pipes plus high-capacity fuel pumps. With old cars, an accident usually stopped the fuel pump so the supply of fuel to help start a fire was much reduced. Then there are Jeeps, which don't even need the accident, but go "woompf" just sitting in a driveway. I only ever saw two cars spontaneously "just start to burn" in the old days. One was my old Austin Tasman, & the other was a early 1980s Peugeot. In each case, it was a quite gentle, slow process, with plenty of time to remove yourself & valuables from the vehicle. |
| BrianHG:
--- Quote from: tom66 on December 03, 2023, 09:05:18 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. --- End quote --- 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. --- End quote --- It's literally used by Nissan in some of their vehicles. There's a redundant clutch which activates if power is lost or there is a fault with the system providing a mechanical override, but in normal use the steering is entirely electronic. Combined with variable resistance on the wheel you could create quite a realistic feel whilst gaining the benefits of truly adaptive steering. That said, I can't quite get over the idea of having no mechanical linkage, I don't trust the redundant system quite enough. And ordinary electric power steering is perfectly sufficient IMO, I've never thought that this would improve things, just make them more expensive if anything went wrong! --- Quote from: langwadt on December 03, 2023, 08:00:10 pm ---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 --- End quote --- Yes, these systems exist, I am pretty sure my car has this system: https://youtu.be/watch?v=0P7M8PvG0Pc&t=2m37s However such systems are not infallable, they cannot detect all pedestrians, cyclists etc. Adding more mass will always mean any accident that does happen is more severe. The focus should be on reducing vehicle size and weight where possible. Especially on reducing bonnet height, as that strongly defines the severity of an accident: if you hit a pedestrian with a lower-down car like a Golf, they're much more likely to impact their head on the windscreen, which is less likely to be fatal than with an SUV where head impacts tend to be on bodywork. Obviously, some people need larger vehicles, such as those with wheelchairs, elderly/infirm people, and those who use their vehicle as part of their profession. But SUVs (and trucks) are primarily marketed towards people as a vanity purchase*, and the average occupancy of an SUV barely exceeds that of a smaller car. Cybertruck is even worse, though the statistic in the US for pickup trucks is something like only 30% of people use their pickup bed more than once per year, it's crazy. *Like for instance, the ridiculous SUV ads like these: https://youtu.be/watch?v=0ITLWCfxmLc ... yeah, the majority of the time, this vehicle is gonna be sitting in traffic, like the rest of us. --- End quote --- 4 wheel steering, the authentic ultimate version: https://www.youtube.com/shorts/JXD9c3DZw8o |
| wraper:
--- Quote from: BrianHG on December 10, 2023, 12:36:50 am ---4 wheel steering, the authentic ultimate version: https://www.youtube.com/shorts/JXD9c3DZw8o --- End quote --- That's just yet another concept though. You can implement all sorts of weird shit on those because it does not need to actually work IRL or have sensible cost. |
| vk6zgo:
--- Quote from: Circlotron on December 08, 2023, 11:23:29 pm --- --- Quote from: bdunham7 on December 02, 2023, 11:36:17 pm ---Here's a video of a full-frontal crash demonstrating 'too much' crumple zone. --- End quote --- I actually had one of those. If you read the development story on them they were an immensely strong and durable car. Built to tolerate some of the worst Australian outback roads. Some time ago I did a bit of searching regarding that video. That particular car had several hundred kilograms of sandbags in the boot as well as a number of cuts to the bodywork in strategic places to ensure it folded up in a dramatic way, which it did. Rest assured, proper version of that car were nothing like in that video. --- End quote --- Anyone of a reasonable age who lives in Australia would have seen many Holden Commodores of that model which had been involved in real accidents. In a front-end impact like that, the front crumple zones operated as designed, with the passenger compartment remaining largely intact, obviously depending upon the severity of the accident. Over time, for some inconceivable reason, there was a concerted effort by some to denigrate anything Australian made, but this is the first time I have seen such a blatantly fake video about Commodores. GMH made plenty of stuff ups like any manufacturer, especially after GM in Detroit started reducing the autonomy of its subsidiary companies around the World. That went well, didn't it Vauxhall? |
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