Yes this is why EV brake pads last 2-3 times more miles. They aren’t being used due to the regen braking.
Electric cars produce less brake dust pollution than combustion-engine cars
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Re: Electric cars produce less brake dust pollution than combustion-engine cars
#392Earlier quoted context omitted.
> […] but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range. Which is why I'm surprised electric cars with range extenders aren't a bigger thing: * https://en.wikipedia.org/wiki/Range_extender Have the powertrain be all-electric, and have a battery pack, but for those with range anxiety have a small generator as an option that woul…
Maybe because people don't want to have oil changes, emission checks, exhaust gas etc. on their EV. If they really need a long range, they will probably just buy a combustion engine car.
Perhaps, but other than the upcoming Scout, I’m not even sure it’s an option for EVs, in the US.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#393Earlier quoted context omitted.
which is the whole point of hybrids Part of the point, not the whole point. Regenerative breaking is absolutely a win; but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range.
> […] but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range. Which is why I'm surprised electric cars with range extenders aren't a bigger thing: * https://en.wikipedia.org/wiki/Range_extender Have the powertrain be all-electric, and have a battery pack, but for those with range anxiety have a small generator as an option that woul…
The newer London black cabs do that
> The LEVC TX is powered by a full-electric hybrid drivetrain. It drives in full-electric mode all the time, but is recharged by an 81-horsepower (60 kW; 82 PS) Volvo-sourced 1.5-litre turbocharged three-cylinder petrol engine.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#394EVs tend to be heavier that ICE vehicles, I’m skeptical of this conclusion. I’m not sure how you get more tire wear but less brake dust.
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Re: Electric cars produce less brake dust pollution than combustion-engine cars
#395Earlier quoted context omitted.
I am just excited because the more EVs mean fewer idiots in hot rods running without mufflers.
Well there are new classes of idiots I see pretty frequently - a typical tesla driver going 90 in 120 region of highway without any reason, presumably saving last bits of battery (that has at least some rationale, if they do it due to ie fear then they should not be driving or having license). Over say 50km part of highway, maybe 2000 cars need to overtake such almost stationary object (to regular traffic which gener…
Are you saying it's not ok to drive 90km/h in a zone where 120km/h is allowed?
80km/h is the usual maximum allowed speed for trucks, at least in Germany, so no idea how a car driving 90km/h is such a big problem. That's not a "stationary object" at all, far from it. You are even allowed to drive vehicles with a minimum speed of 60km/h on the Autobahn.
If a car driving 90km/h is the cause for a traffic jam there are definitely other factors at play. Not just in zones with a limit of 120km/h but everywhere even without limits.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#396Earlier quoted context omitted.
There are two aspect I don't like: 1. It is inconsistent, especially during winter and when fully charged. 2. Crossings with shrubbery/objects that hides approaching pedestrians/cars/bikes and it is rare that there is anyone actually crossing. I encounter these several times per day. My preferred way of approaching #2 is to reduce speed well ahead, start gliding and put my foot on the break pedal to be ready for a co…
Hmm, I don't really understand what you mean. If I want to reduce speed far ahead, I just ease up on the throttle pedal a little, and the car slows down a little. If I ease up a lot, it slows down a lot. I'm not sure what you mean...
I want to glide at roughly constant speed for some distance. Some mild breaking is fine. I cant glide if I let off the accelerator, then I come to a fairly firm stop.
I want my right foot on the break pedal, ready to brake hard and fast in the rare case that something comes across the road.
I don't want to reduce speed any further than is necessary to have a safe breaking distance at fully ready state.
With any other car (that I have driven) than the Tesla, I can approach a situation like this at between 20kmh and 40kmh, depending on the specifics. In the Tesla I need to go at between 5 and 10kmh.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#397I suppose the same should apply to hybrid cars, which outnumber pure EVs significantly [1]. The effect comes from converting the kinetic energy back to the battery charge via generation instead of wasting it via friction, which is the whole point of hybrids. [1]: https://www.consumeraffairs.com/automotive/how-many-electric...
which is the whole point of hybrids Part of the point, not the whole point. Regenerative breaking is absolutely a win; but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range.
This is the thing with good hybrids.
The "gas pedal" becomes a "I want to go faster/slower" pedal, its position has zero impact on the RPM.
As an anecdote: A security company I know only buys Toyota Hybrids for their guards just because of that. They have a habit of driving cars like they stole them and normal ICE cars break down from that kind of abuse. Hybrids won't let you abuse them, they pick the RPM and you deal with it.
(They also swap the passenger seat for a plastic box because the guards threw heavy crap like safety boxes on it, wearing down the seat in months)
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#398Earlier quoted context omitted.
which is the whole point of hybrids Part of the point, not the whole point. Regenerative breaking is absolutely a win; but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range.
> […] but there can also be a significant benefit from allowing the ICE to remain in the RPM "sweet spot" rather than moving around a larger range. Which is why I'm surprised electric cars with range extenders aren't a bigger thing: * https://en.wikipedia.org/wiki/Range_extender Have the powertrain be all-electric, and have a battery pack, but for those with range anxiety have a small generator as an option that woul…
Diesel REX vans would be a MASSIVE hit if a company would just decide to start making them.
The #1 reason for (european) companies not buying full EV vans is range, they need to drive a LOT during the day.
REX would solve that with minimal emissions. And depending on the battery size, they could drive on full EV in city centres and only allow the REX to charge the battery during longer drives.
The BMW i3 REX is a fantastic car, if you can find one, buy it.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#399the brake needs a brand new design for EV... as of now it's used so little I kind of fear when I need it it's not going to be performant. It's not simply not engineered for current EV use case where it's touched every once in a while, I think it can go weeks without being used. However manufacturers don't have any incentive to blend it with regen from time to time, as to get it up to temperature requires a LOT of bra…
That is actually one reason some companies are trying to move back to all drum brakes for EVs. The drum protects the brakes from water, rust, and debri fairly well and is far more reliable when not used as often. The only real obstacle is car companies having spent the last few decades focusing all their braking and traction control features on disc brakes so they need to be reimplemented for use in drums. And really…
This comment comes across a lot like the fanboys screeching about how their 1985 or 91 Toyota had a "nice" interior as if the most rattle prone 2009 GM work truck interior isn't better in every way just as a result of sheer cumulative progress. Like if you actually put A beside B and look at them without the rose tinted veneer of nostalgia it's not even a comparison.
Rusty rarely exercised drum brakes have a ton of failure modes that result in severely degraded or nonexistent performance that the average motorist probably wouldn't care about until they really need the brakes and they don't all work well enough.
The heat capacity of drums is pretty easily made noticeable, not "exceeded" to the point of substantially reduced capacity, but noticeable from the driver's seat in just a few good stops in high ambient temps (think like stop and go light to light in somewhere like DC or Miami) or one decent hill. Yeah you can polish the turd with fancy fins and materials and airflow, etc. but discs are just so much better per dollar and per pound.
Most of the problems discs have are NVH and rotor problems that are easily solved for intermittent/lesser use with the simple use of better alloys (Dexter even makes stainless for boat trailers, which are probably the ultimate example of extreme intermittent usage, so it's not like this is groundbreaking). Dominant slider pin designs these days are highly optimized for performance/NVH at the expense of longevity but there's an entire catalog of historical designs that one could easily conclude have better tradeoffs for less demanding usage.
Re: Electric cars produce less brake dust pollution than combustion-engine cars
#400Earlier quoted context omitted.
Another part of the point is that you can pack a much smaller and more efficient ICE and then substitute the missing power and torque from electric motors when needed. Most cars are not used at max power all the time. You need max power only at short times when accelerating. With pure ICE there is the tradeoff - a bigger engine will get you more max power / max torque but is going to be less fuel efficient because of…
On paper, yes, but did that ever happen? Sorry for being sarcastic, but where I live the frugal hybrid is exceptionally rare and the "same big engine, but driving a much heavier car" hybrid is omnipresent. The kind of people who might buy the frugal one buy second or third hand while almost all buyers of factory new pick the "same big engine" option, and those are the ones who decide what's available on the second ha…
>On paper, yes, but did that ever happen?
Like absolutely, unless you consider 1.4L petrol engine large for something with over 170KW (over 220hp). Such kind of offerings are quite common at the East side of the pond.