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Another way electric cars clean the air: study says brake dust reduced by 83%

electrek.co

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Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#41
post #36
post #32

Earlier quoted context omitted.

Tire wear right now is worse, because tires contain an anti-oxidant that gets oxidized into a compound that is highly toxic to aquatic life. The work is underway to standardize on a replacement. This time with even more tests.

I wonder if this will be like lead in av-gas. Lol.

Not really. There are plenty of possible replacements, the industry wants to make sure that _this_ time it won't hurt some Australian finches if tires are exposed to moonlight or something.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#42
post #34
post #28

Earlier quoted context omitted.

Exactly. EVs are a band-aid, but the true cure is simply viable alternatives to driving .

It's the inverse. Bikes are a temporary 19-th century fix for the lack of easily available personal cars.

Cars are a 20th century fix for the lack of easily available, comfortable, and fast public transportation. It's a shame the USA got stuck in the mid-20th century on that front.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#43
I was living on the 4th floor next to a main road once. I could wipe a thick layer of gray dust from my balcony furniture eevery two days. This surprised me initially, since it was high up and a big garden separated the road and the house.

The worst thing was the noise. When I lived there I tuned it out, but when I slept for the first night in my new flat it felt like someone lifted a huge rock from my chest.

Cars in cities are a really thing to tolerate from the standpoint of people who bear the cost of them being there, EVs help reducing two of the main issues with cars. Issues like space use remain (housing prices skyrocket while there is a ton of empty space used for storing cars while nobody drives). Who knows, maybe EVs can solve this one too one day.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#45
post #30

Earlier quoted context omitted.

I agree there are effects of increased linear acceleration, however I disagree with you because of: On many roads you accelerate and brake less often than you go around corners. These two things are equivalent on tire wear given the forces involved: 1 corner at 50kmh with 50m radius. Accelerating linearly at 0.39g (7 second 0-100kmh) to 77kmh from 0.

I don't think that's neccessarily a disagreement? Both things can be true - if you mostly drive on roads with fast corners, the heavier car will wear out its tyres faster. If you drive on roads with lots of start/stop traffic but not many "at speed" corners then the one that consistently accelerates harder will wear out its tyres quicker.

Yes, it depends on how you drive and where, however I would note the above: 50kmh is typical of city driving and 50m isn't exactly a tight radius. 77kmh is actually quite fast, and 0.39g is actually quite high acceleration (this is flooring it in chill mode in a Tesla model y). I am trying to say that the driving circumstances where the linear forces are more important than the horizontal forces are fewer in number.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#46
post #20

Earlier quoted context omitted.

I'm 99% sure this is a troll, but I hate to see misinformation go uncorrected. If this isn't a troll, you've been misled by fossil fuel industry propaganda, and I'm sorry. While EVs can be heavier, they often achieve high safety ratings due to their low center of gravity and robust battery protection. Advanced safety features are standard. Studies suggest that EV charging, especially when managed, can help stabilize…

It is not a troll. I was talking about safety for the drivers in the car that collide with the EV. They are less safe with EVs on the road. When we have marginal electricity pricing, and electric cars necessarily being marginal demand, then they will ramp pricing a lot for all users , not just those driving electric cars. This far outweighs the benefit of grid balancing services (which this green revolution has creat…

> I was talking about safety for the drivers in the car that collide with the EV. They are less safe with EVs on the road.

So is a Model T. But we aren’t all still driving Model Ts, are we? Technology improves, and of course older cars are less safe. There is a weight difference, but it’s no different from that of an SUV vs. a Corolla.

> Efficiency above 80% is clearly worse than below 80%. I drove 30k miles in a Tesla on road trips and saw that consistently.

Depends on the car, but the reason for this is almost solely because you lose regenerative breaking at high SOC. That’s less efficient, but not less efficient than an ICE car, and you only do it on road trips, which don’t happen often.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#47
post #38

Anybody who ever driven an EV, would have told that the initial scare about brake dust was pure nonsense. EVs barely use frictional brakes, with regen performing most of the braking action. Frictional brakes only really come into play to slow down from around ~5 mph to a complete stop. And even that can be eliminated by essentially running the motor backwards, at low torque. This mode of braking is sometimes used on…

How does this generally work wrt brakes needing to be used occasionally to not rust shut? Even with an ICE car if you don't drive a lot, and drive in a fuel efficient way (e.g. coasting towards red lights) this can be an issue resulting in an expensive surprise when you need to replace disks long before they are worn out.

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#49
post #5

> It turns out that BEVs (battery electric vehicles) reduce the amount of brake dust by 83%, according to a new analysis by EIT Urban Mobility (a body of the European Union) and Transport for London. The study looked primarily at London, Milan and Barcelona. > The primary reason for this is the use of regenerative braking, meaning that electric vehicles can slow down without rubbing friction brakes. Other vehicles th…

Cars clean the air because the AC filters capture particles

Some diesel engines can clean the air, but only if the air coming in is very polluted. They'll catch and burn particulates, and they'll chemically scrub NOx. This only applies if the air outside is very polluted, though

Re: Another way electric cars clean the air: study says brake dust reduced by 83%

#50
post #30

Earlier quoted context omitted.

So obviously and logically speaking, an ICE car of equivalent weight should have the same tyre wear, and we know that's not true - there are some very heavy ICEs around which still manage to do 50k miles on a single set of tyres without any issue. EVs have instant torque from 0rpm and people use it and that's the main reason. Case in point - we have a Volkswagen e-Up, it barely weighs 1000kg, it's pretty much one of…

I agree there are effects of increased linear acceleration, however I disagree with you because of: On many roads you accelerate and brake less often than you go around corners. These two things are equivalent on tire wear given the forces involved: 1 corner at 50kmh with 50m radius. Accelerating linearly at 0.39g (7 second 0-100kmh) to 77kmh from 0.

I mean, I brake and then accelerate every time I go around corners.
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