- kjetil@lemmy.worldEnglish3 hours
Well that sounds terrifying. There’s a reason why the brake hydraulicsystem is actually two separate hydraulic systems, for diagonally opposite wheels. The only single-point-of-failure is the brake pedal.
Their leaving out the critical details on how this will electric system will be fail safe, or even legal.
The announcement was light on details about both the system itself and how its fail-safes are implemented.
Maybe they’ll return to spring actuated mechanical brakes that are released when everything is working. (More common in heavy industry, and I believe also truck brakes)
- grue@lemmy.worldEnglish59 minutes
The only single-point-of-failure is the brake pedal.
And even then, only on cars with those stupid electronic parking brakes instead of a proper mechanical emergency brake.
- 2 hours
It would be trivial to keep the car from starting if the brakes don’t pass a system check, and make the main electric motor of the car apply maximum regen braking if the system fails en route.
And you’d have one motor per wheel, so if one fails you still have more than enough braking power.
In principle, a system based on electric motors should be a lot more reliable than one based on hydraulics.
- IWW4@lemmy.zipEnglish2 hours
This is really cool……. BUT
Save money by not requiring pads and rotors.
I call BULLSHIT
The announcement was light on details about both the system
So it is light on details but they KNOW it will save cash. Sure we won’t have to drop 300-500 bucks on pads and/or rotors every three years but we will have to replace the electric motor every five years to the tune of 4,000.
- mlegstrong@sh.itjust.worksEnglish21 minutes
Idk it might use magnetic brake pads. I have used them in other fields & they are pretty nifty. The ones I used created eddy currents & had not mechanical wear. For my project the mechanical brake had a ~10 year lifespan while the magnetic brake could last ~50 years. Also the mag brake was only 30% more expensive but didn’t need maintenance & would be significantly cheaper if you took the lifespan of the project.
- 2 hours
Unless they deliberately put in a part designed to wear out in 5 years, there’s really nothing in an electric motor that would.
- FireRetardant@lemmy.worldEnglish41 minutes
Bearings can sieze up, starting capacitors can go. A worn bearing can overheat the windings and cause damage.
- 36 minutes
Yes, but those are things that can be designed to last decades, at very little cost.
- FireRetardant@lemmy.worldEnglish33 minutes
They can’t have perfect quality control for every part that leaves the manufacturer, especially considering the massive temperature fluctuations they might experience, humidity changes, road salt, and the fact its attached to something hitting bumps and potholes at 100+ km/h.
- 1 minute
So… how do manufacturers of hydraulic brakes do this?? Or any other safety- critical part on a car?
- FireRetardant@lemmy.worldEnglish42 minutes
Subscription to the live cloud service that connects your pedal to your braking system
- Skyrmir@lemmy.worldEnglish6 hours
That’s going to be very interesting to see failure rates and modes on the road over time.
- Trilogy3452@lemmy.worldEnglish4 hours
We at least know it could potentially have really low failure rates since airplanes have the same type of systems today, and that’s highly regulated
- kjetil@lemmy.worldEnglish2 hours
I’m more concerned about the failure mode than the failure rates. Mechanical and hydraulic brakes can experience gradual failure, giving the driver a chance to pull over get the car repaired.
EVs usually have a single motor and a single inverter , both of which can fail suddenly. Electronics usually work perfectly fine until they suddenly don’t work at all (blown fuse, bad connection, blown capacitor etc)
How are they gonna build redundancy so that no single component failure means youre freewheeling downhill on the highway
- phutatorius@lemmy.zipEnglish2 hours
Brakes on airplanes are used infrequently (though when they’re used, they’re safety-critical) so the usage pattern is very different than for cars.
- psx_crab@lemmy.zipEnglish6 hours
Brembo’s new “Sensify” braking system takes that one step further, eliminating the hydraulic system entirely and relying instead purely on electronic brake-by-wire and electric motors.
I can see it catch on for EV, pretty sure it won’t be used on ICEV considering brake is the only thing that can stop the car
- FireRetardant@lemmy.worldEnglish39 minutes
Downshifting used to be a thing people would do to slow down a car significantly.
- psx_crab@lemmy.zipEnglish27 minutes
Takes quite a bit of practice to use it in emergency though, but for normal slowing down it’s pretty handy, and manual transmission tend to slow down car a lot when releasing the gas pedal.
- 34 minutes
I engine break all the time as my car has paddle shifters. Reduces the time between break jobs
- FireRetardant@lemmy.worldEnglish32 minutes
I’m torn cause i drive a stick and its much more difficult for me to swap out a worn out clutch than doing a brake job. I usually leave a lot of distance and just coast in neutral when approaching stops.
- Retail4068@lemmy.worldEnglish3 hours
plus it saves you money on wear parts, because bypassing the hydraulic system means bypassing the pads and rotors too.
I replace my 911 rotors and pads once every 6 years? They cost $450 for the semi track compound.
These things ain’t saving anybody a dime but the manufacturer.
- grue@lemmy.worldEnglish54 minutes
I replace my 911 rotors and pads once every 6 years?
Tell me you’re wasting your 911 without telling me you’re wasting your 911.
- Retail4068@lemmy.worldEnglish38 minutes
You’re right, I don’t track or hpde it that much anymore. I’ve moved on to actual race car shit. 4 lemons a year. You’re barking up the wrong tree. My current build, spec 3.
- Mpatch@lemmy.worldEnglish2 hours
That’s just bad anecdotal evidence. A 2001 jetta, a full pad and rotor swap can be done for sub $200, a 2020 silverardo the rears alone will cost about $800, a 2010 gmc Acadia will run about $1100 for all four. And this could be from every year to every 6 years based on how many km are put on a given year.
- Retail4068@lemmy.worldEnglish1 hour
And you really think even at a grand it’ll save you anything? Very few people outside of sports cars are replacing brakes that often. It’s like buying a 70k new EV to “save money” on gas with some copium that you’ll be the 3% to own the car for more than 6 years.
On ice vehicles this is dumb. Hard and expensive to repair for a brake pedal that feels like shit. Absolutely fucks the secondary and third owners looking for a cheap simple car to keep running.
- unitedwithme@lemmy.todayEnglish56 minutes
What?? You don’t replaced your brakes at 5-6 years? If you drive under the US national average of 12k/year it should be around every 50-60k miles, so 5-6 years. Normally you hear the brake wear indicator squealing sound. Do you wait for the grinding noise to start and a funny smell? Yes, most people ARE in fact replacing at about 5 years. More often the cheaper you go as they wear out faster.
2 hoursI’ll take $450 in my pocket every 6 years, thanks. The bigger savior is not having your wheels constantly caked in brake dust.
Brembo’s new “Sensify” braking system takes that one step further, eliminating the hydraulic system entirely and relying instead purely on electronic brake-by-wire and electric motors.
ok but…y tho?
- 1 hour
Fewer wear parts and fluids to change sounds pretty nice, actually.
