I wonder what the air quality is like in and around racing car circuits, given brake, tire, and exhaust pipe emissions.
Vehicle brakes produce charged particles that may harm public health: study
141–150 of 320 posts
Re: Vehicle brakes produce charged particles that may harm public health: study
#142Earlier quoted context omitted.
I've never driven an EV. How do you approach stop signs and red lights other than braking? Is "engine braking" (regenerative braking?) strong enough to handle that big a fraction of slowing down in city traffic?
The engine can slow down the vehicle at roughly the same rate it can accelerate it. And if you have an EV that has a 3 second 0-60...
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Re: Vehicle brakes produce charged particles that may harm public health: study
#143Earlier quoted context omitted.
The article has weird reasoning. If we remove tailpipe emissions, which are by far the largest, then brake/tire wear emissions become visible and are next in the list to deal with. But we won't deal with the latter before the former is dealt with.
> If we remove tailpipe emissions, which are by far the largest im gonna need a source on your claim. heres a source that claims the opposite https://www.washingtonpost.com/climate-environment/2023/07/0... > our brakes and tires isn’t benign, either. Tests by Emissions Analytics, an engineering consulting company based in England, found tires produce about 2,000 times more particle pollution by mass than tailpipes.
the article was about brake emissions. Yet you're pointing to an article about tires.
Re: Vehicle brakes produce charged particles that may harm public health: study
#144Electric vehicles are heavier, which means they must spend more brake pads to stop. But they also use regenerative breaking, which reduces pad wear. So I'm not sure if they make it worse or not.
Regen braking in most EVs is significant enough that the brake lights come on when you lift off the throttle pedal (which is what engages the regen). Tesla has said their brake pads are potentially lifetime. And for good reason. You barely use them; so much less than a normal car it’s not even close. I have a friend with a 3 approaching 100k miles and isn’t even through half a set of pads. My EV, you couldn’t even bo…
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Re: Vehicle brakes produce charged particles that may harm public health: study
#145Earlier quoted context omitted.
I do indeed mean a stable! I don't imagine the particulates coming out of stables are going to be all that great. Also, my car doesn't get sick if I park it next to somebody's beater.
There are classes of parking garages too. I’m not parking my hypothetical dream Ferrari next to some poor person’s beat up Honda civic from the 90’s to get dinged and the windows broken. The underground parking garage at Apple must be astounding.
You mean the place where people park their dream Ferraris next to some rich person’s beat up Honda Civic from the 90s?
Re: Vehicle brakes produce charged particles that may harm public health: study
#146Earlier quoted context omitted.
The article has this statement: > The new study reveals a problem that may grow as electric cars become more and more common over the next several decades. Electric cars, Smith explained, are not truly zero-emission vehicles, so municipalities need to think about strategies to reduce emissions from brake use as well as tailpipes. Which completely ignores regenerative braking.
The first sentence of the abstract also shows a technically correct statement easily used for disingenuous framings: “The coming decades promise a transition from internal combustion engines to electric, and with it a greater relative contribution of nonexhaust sources to urban air pollution.”
The brake dust argument is something I’ve noticed coming more from the “ban all cars” crowd more than the “anti-EV/pro-ICE” crowd.
I assume the objective is that these people want to see things go from ICE cars to public transportation instead of EVs.
Re: Vehicle brakes produce charged particles that may harm public health: study
#147Just want to point out that most electric and hybrid vehicles use regenerative braking most of the time and only use real brakes at very slow speeds or in emergencies. So it might be totally misleading to say that electric vehicles are the problem, when they are probably the solution.
they still emit tire particulate emissions. moreso than ICE vehicles due to the increased weight
Re: Vehicle brakes produce charged particles that may harm public health: study
#148Earlier quoted context omitted.
https://www.cdc.gov/mmwr/preview/mmwrhtml/su6203a8.htm "In the United States, it is widely accepted that economically disadvantaged and minority populations share a disproportionate burden of air pollution exposure and risk (26,27). A growing body of evidence demonstrates that minority populations and persons of lower socioeconomic status experience higher residential exposure to traffic and traffic-related air pollu…
It's not surprising that minorities would be exposed to more traffic given the proportion that live in urban areas, but that doesn't rule out that the poorest in the country (minorities and whites) are not the most exposed. I guess my basic question is, are the poorest people still living in city centers? In my city the central, densest areas became some of the wealthiest, the quieter outlying areas the poorest.
> …that doesn't rule out that the poorest in the country (minorities and whites) are not the most exposed.
Setting aside race, to me it seems like "economically disadvantaged populations share a disproportionate burden of traffic-related air pollution exposure" makes this pretty clear.
Re: Vehicle brakes produce charged particles that may harm public health: study
#149I wonder what the air quality is like in and around racing car circuits, given brake, tire, and exhaust pipe emissions.
I'd also be curious about brake pad composites.
In car brakes you can have slightly different designs/materials for pads which cause the balance of noisedusttemperature performance to differ. For instance if you want to reduce dust emission, generally you get brakes that are much louder in my experience until they warm up but they are much "cleaner".
Re: Vehicle brakes produce charged particles that may harm public health: study
#150Earlier quoted context omitted.
A theoretical cartel can do precisely nothing, since it's a mere mental construct. It takes an actual cartel to fix prices (ignoring as a distraction the fact that the link you provide gives several good reasons to think that planned obsolescence was not the primary factor in the lifetime of incandescent bulbs). There is no brake pad cartel. If there is, demonstrate it. If not, again, an imaginary cartel can only do…
I'm gonna let you reflect on what you just said.
Translation: you have no coherent response to what I said, and don't like that, so you figured a bit of snark might recover some dignity. It's better to simply not reply.