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Sagebrush posted:Is wheel speed == 0? Ok then release brakes. It's a bit more complicated than this. There could well be many cars on the market with poor ABS implementation that never got any press or any updates. But for the most part, engineers look at what it takes to make a good ABS implementation and say "gently caress it, just get off the shelf Bosch units". Tesla of course, jumps at the opportunity to reinvent the wheel and anything wheel-related. edit to un-snark: it's more complicated, but not necessarily a lot more. It looks at wheel speed rates of change and then compares that to a set of rules of which wheels are allowed to do what. Ola fucked around with this message at 15:57 on May 22, 2018 |
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May 22, 2018 15:48
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Even off the shelf units have to have some calibration for the vehicle they are installed on. There's a shitton of variables that go into a proper abs solution than just wheelspeed. In Subaru's case, the suspension was basically triggering ice mode where traction is assumed to be near zero and the ABS is pulsed very fast with little force to prevent a direction-less slide. The main intent of ABS is to keep the car going in the same direction it was going during braking. The suspension bounce was causing such a loss of traction that the ABS unit assumed that the wheels that went over the bump were on ice. If that's the case, it's not just enough to limit braking on those wheels to try to extract as much breaking traction as you can, you also need to limit braking force in the wheels with traction or those wheels are going to plant and the car will enter a spin. So, the car, due to suspension design, was being tricked into thinking that a chunk of wheels were on ice and thus has to cut braking force to everything to keep the car going in a straight line.
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May 22, 2018 16:02
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Even big manufacturers face this problem http://www2.toyota.co.jp/en/news/10/02/0209.html What I want to know is, how did they not catch it? Or do they have procedures to catch something like this eventually? It seems insane that a review had to be the one to call this issue out.
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May 22, 2018 16:09
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Ethereal posted:
I think the same can be said for a lot of these defects. In my example, did Subaru never test braking over potholes? What's interesting about this case is the speed of a fix. It's both awesome and concerning. It took several accidents and an NTSB investigation for Subaru to even admit to the issue and then several months more to get a fix program in place. Tesla decides within a day they are going to fix the problem (good) and promise a fix shortly via OTA (concerning.) Either the fix is going to go out with not enough testing and investigation time, or the issue was already known about and the fix was already scheduled.
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May 22, 2018 16:18
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“Shortly” can mean a lot of things.
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May 22, 2018 16:20
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Subjunctive posted:“Shortly” can mean a lot of things. True that. There's alot of things that Elon promised shortly that took a year + or never happened.
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May 22, 2018 16:36
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ABS calibration at fault / fix via OTA? gently caress Tesla. Hurry up and crater so the rest of the auto industry can get EVs done correctly. Someone asked / mentioned earlier if Tesla was having trouble finding vendors to supply and work with them...they have definitely had that in the past. Playing nice and then dropping the supplier after (poorly) reverse-engineering the component and vertically integrating it, and approaching suppliers with an attitude I can best summarize at “lol why do cars still have four wheels, you guys can’t innovate, move fast and break things.” Horrid organization to deal with. Good engineers buried deep down though.
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May 22, 2018 18:32
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big crush on Chad OMG posted:Why bother employing competent QA testers when the public will do it for free and then fawn over you making the changes?  Unrelated: https://www.youtube.com/watch?v=HePVTmr_CDM
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May 22, 2018 19:47
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movax posted:gently caress Tesla. Hurry up and crater so the rest of the auto industry can get EVs done correctly. Right now Tesla's the only one really pushing EVs as something more than a 100 mile street-legal golf cart, trying to produce them in mass quantities, not poo-poo them at the time of sale, and provide the charging infrastructure to eliminate some travel range anxiety. I, too, would much rather live in a world where there are more than two manufacturers putting out >200 mile range EVs. Tesla succeeding makes that happen much faster. Half my reasoning for buying a model 3 was a vote for that world ¯\_(ツ)_/¯
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May 22, 2018 19:49
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movax posted:ABS calibration at fault / fix via OTA? gently caress Tesla. Hurry up and crater so the rest of the auto industry can get EVs done correctly. If they get EVs done at all. With the way that US manufacturers are dragging their feet, I have the feeling without Tesla we’d have protectionist imports on EVs coming to the US and gas-guzzling poo poo roaming the streets after GM, Ford and Exxon-Mobil
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May 22, 2018 19:51
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Proof that there is too much wood on the dash.
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May 22, 2018 19:53
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Voted 1, didn't break a window or do the woody woodpecker laugh.
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May 22, 2018 20:28
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hifi posted:he means the actual vents that you see in the car. you drag a little dot to aim the air at your nuts This isn’t unique to Tesla; the new Panamera (and presumably Cayenne) has a feature like this too and it’s actually pretty cool.
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May 22, 2018 20:30
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drgitlin posted:This isn’t unique to Tesla; the new Panamera (and presumably Cayenne) has a feature like this too and it’s actually pretty cool.
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May 22, 2018 20:49
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ilkhan posted:Since its just electronically adjusting the speed of the fans its probably more reliable, too. It also changes where the fans aim their air.
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May 22, 2018 21:31
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Ripoff posted:Hate Tesla all you want, they’re still the reason that people even know about EVs nowadays. Tesla made EVs cool. Showed everyone they didn't have to be pseudo-golf carts with a top speed of 25mph.
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May 22, 2018 21:38
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drgitlin posted:This isn’t unique to Tesla; the new Panamera (and presumably Cayenne) has a feature like this too and it’s actually pretty cool. My boss has the new Panamera and adjusting the vents is a pain (in the rear seats, haven't seen how they work in the front seats). There's a giant touchscreen with a graphic of the vent and a little white dot where the vents are aimed, you drag the dot to where you want to aim the vents and about a second later the physical vents start moving around. It's cool to see and mess with at the beginning, but in practice you position the vent, wait for it to physically adjust, find that's a little too high/low/left/right, re-position the vent, wait for it to physically adjust, find that's a little too high/low/left/right, repeat over and over until you get it exactly where you want where with a little nub on the vent you can have it done almost immediately.
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May 22, 2018 21:49
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Went camping this weekend with our S in the olympic mountains and stellar's Jays kept checkin out the car. Also other campers. These are the jays - https://www.fws.gov/refuge/willapa/wildlife_and_habitat/birds/stellers_jay.html they look rad. 
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May 22, 2018 22:06
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Did nobody else laugh at this?quote:Tesla won’t stop until Model 3 has better braking than any remotely comparable car.
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May 23, 2018 00:37
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roomforthetuna posted:Did nobody else laugh at this? I didn't at first,. But can't stop snickering now..
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May 23, 2018 01:04
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drgitlin posted:It also changes where the fans aim their air. And yeah, without Tesla EVs would still be a non-thing.
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May 23, 2018 16:00
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Bullshit, they deserve some credit for changing a lot of pre-conceived notions about EVs but EVs were going to come regardless because India and China desperately need them and CARB mandated them so the major manufactures were going to ship them to the US regardless.
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May 23, 2018 16:11
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I mean cheap drugs are a thing in China and India, too. Doesn't mean they'd ever end up in the US. Some things are better in other countries because they make laws to put a stop to corporate bullshit. The US makes laws to enforce it.
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May 23, 2018 16:23
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Three Olives posted:Bullshit, they deserve some credit for changing a lot of pre-conceived notions about EVs but EVs were going to come regardless because India and China desperately need them and CARB mandated them so the major manufactures were going to ship them to the US regardless.
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May 23, 2018 16:50
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ilkhan posted:AFAIK it does that by varying the speed and letting the differential between upper and lower and left and right move the air around. No, it actually has little servos that move the blades. https://www.youtube.com/watch?v=0MhnbnBf0UY
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May 23, 2018 17:11
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McPhearson posted:No, it actually has little servos that move the blades.
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May 23, 2018 18:04
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McPhearson posted:No, it actually has little servos that move the blades. Wouldn't it be easier to do that same motion, but with my finger on the vent?
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May 23, 2018 18:04
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McPhearson posted:No, it actually has little servos that move the blades. I'm amazed that that's standard equipment as far as I can tell
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May 23, 2018 18:05
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Think of all the engineering hours that went into such a loving useless thing instead of literally anything else
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May 23, 2018 18:11
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McPhearson posted:No, it actually has little servos that move the blades. That's spectacularly dumb. It's perfect as tech satire.
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May 23, 2018 18:17
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mobby_6kl posted:Haha that's the dumbest poo poo ever. The vents are right loving there! I’m pretty sure that is so the vent position is stored in the driver profile so you don’t have to readjust them every time someone else drives the car. If you want to offer that feature doing the screen setting is probably a lot cheaper and more reliable than making it where you can make manual adjustments to servo operated vents and position sensors.
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May 23, 2018 18:25
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Yeah, that’s what I figure.
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May 23, 2018 18:38
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ah yes, because that is what i, a normal human being, desire: always the same level of airflow at exactly the same place on my body at all times. when i get in the car i want those vents at exactly the same fuckin place down to the millimeter regardless of ambient temperature or what i'm wearing or how i feel that day. hell yes. saving valuable milliseconds here that i can use for my important business job. i am a master of the universe
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May 23, 2018 18:46
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the model 3 air vent https://www.youtube.com/watch?v=h-8k3g59GHs&t=154s
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May 23, 2018 19:18
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Sagebrush posted:ah yes, because that is what i, a normal human being, desire: always the same level of airflow at exactly the same place on my body at all times. when i get in the car i want those vents at exactly the same fuckin place down to the millimeter regardless of ambient temperature or what i'm wearing or how i feel that day. hell yes. saving valuable milliseconds here that i can use for my important business job. i am a master of the universe The bay area does crazy things to people
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May 23, 2018 19:29
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You meant Stuttgart, right. And yes it does.
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May 23, 2018 19:40
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Ola posted:That's spectacularly dumb. It's perfect as tech satire. You've heard of Porsche, right?
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May 23, 2018 19:46
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Sagebrush posted:ah yes, because that is what i, a normal human being, desire: always the same level of airflow at exactly the same place on my body at all times. when i get in the car i want those vents at exactly the same fuckin place down to the millimeter regardless of ambient temperature or what i'm wearing or how i feel that day. hell yes. saving valuable milliseconds here that i can use for my important business job. i am a master of the universe To be honest I haven’t moved my air vents since I bought my car so it might be a nice feature if you share a car frequently? With most luxury features in cars we are kind of getting to the point where car designers just say gently caress it, throw it in there. I don’t think anyone was really wanting door puddle lights but those seem standard now on luxury cars.
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May 23, 2018 19:51
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Are they really that retarded? I've never even driven one. I guess I might be falling for the stereotypical German engineering ideals.
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May 23, 2018 19:52
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I just don't get how vent profiles are useful in anyway. Even if you share a vehicle and the person you share a car with has their vent in a different location, can't that be solved with a literal flick of a finger?
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May 23, 2018 19:59
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