601–610 of 783 posts
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But in a manual transmission car, downshifting and engine braking produces clutch dust instead of brake dust (basically the same thing).
In a modern car, or if you adequately rev match, the clutch wear is extremely small. Only if you are aggressively down shifting will that be a problem. It’s also only wear at that point in time, not the entire time through engine braking.
For DIY EV conversions (I built some cars) you usually hook up the "regenerate braking" to the brakelight switch. So as soon as you tap the brake pedal just a little, you start regenerating and see the amps flow back into the battery (I have a little display on my dashboard). Only when you press the pedal further, do you start engaging the friction brakes. I have no statistics on brake pad differences because we didn…
With a manual car, it was common to downshift and use the engine to decelerate. I’m wondering if electric vehicles might actually cause a return to a third pedal to re-add some of the fine tuned controls that a manual transmission allowed. Maybe the “downshift” could engage the regen brake specifically.
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But in a manual transmission car, downshifting and engine braking produces clutch dust instead of brake dust (basically the same thing).
Anecdotally, every car I've been in where the driver talks about engine braking is rode hard and put up wet. Humans seem pretty bad at downshifting/engine braking outside of vehicles designed for that purpose like big rigs. Cars have much fewer gears so it's harder to align the downshift. Of course there's little use in having this conversation since we all think ourselves above average drivers. I've had acquaintance…
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They address this briefly in the article (though inadequately) , that tire particles are heavier and doesn’t end up in the air like brake dust. But you do raise a good point at the holistic condition, and assessing a broader population with less than ideal configuration. They are looking at lightweight EVs at lower speeds. But Americans drive heavier EVs at highway speeds. The rotors & pads are huge.
> They are looking at lightweight EVs at lower speeds. But Americans drive heavier EVs at highway speeds. The rotors & pads are huge. Perhaps other EV drivers can chime in but, if anything, I think I use my friction brakes less at highway speeds where, in general, you're not really supposed to do a lot of braking. I'd say, overall and regardless of speed, my friction brakes are really used only to bring the car to a…
Some people are very responsible with money - they have an emergency fund, contribute to their retirement fund, and don't carry a credit card balance.
Other people (who have a choice) spend to 0 every month, don't save, and have maxed out credit cards.
In the same way, some people drive very safely; they keep a responsible distance between them and the driver in front of them, and don't tend to speed much. I think this style of driving would naturally lead to what you say - less use of friction breaks in general, and especially at highway speeds.
And other people are constantly speeding, and tailgate the person in front of them when their path is blocked. For the people who drive this way, the greater acceleration of EVs just lets them drive that much more recklessly. Which ends up necessitating even more usage of friction brakes.
For DIY EV conversions (I built some cars) you usually hook up the "regenerate braking" to the brakelight switch. So as soon as you tap the brake pedal just a little, you start regenerating and see the amps flow back into the battery (I have a little display on my dashboard). Only when you press the pedal further, do you start engaging the friction brakes. I have no statistics on brake pad differences because we didn…
With a manual car, it was common to downshift and use the engine to decelerate. I’m wondering if electric vehicles might actually cause a return to a third pedal to re-add some of the fine tuned controls that a manual transmission allowed. Maybe the “downshift” could engage the regen brake specifically.
Another way of further reducing brake dust might be to have a higher regen setting that dumps excess power to a heat sink and cooling system, up to its limit before engaging the mechanical brake pads/discs.
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Much better at what ? Do you have decent data for what it takes (CO2, child labour , cost of supply chain, ...) to make your Lithium based battery VS melting an ICE ? Same question for recycling ? Comparing only the lifecycles of products doesn't make any sense if you don't put in perspective creation & destruction and this is where the massive lie is, no EV constructor has ever been transparent about this because it…
Ships are actually much more fuel efficient than trucks, by weight/volume. Saying it must be inefficient because it includes ship transit instead of trucking "locally" is innumerate.
Ships are indeed more efficient if you look at it on per mile comparison but distances are much bigger. Shipping things from one side of the planet to the other is not something too efficient imo. It's just makes sense if you look at economics and differences in price of labor, regulations and so on but these do have externalities that eventually cancel out the benefits.
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I didn't quite get if you think changing gears for the purpose of engine braking wears the clutch more than normal or not. Are you using the force from the clutch to force the engine to go from a low RPM to a high RPM? In cases like that where the difference in RPM is significant, I would press the clutch pedal, then speed up the engine by pressing the gas pedal, downshift, then release the clutch. Rev matching, basi…
You might not execute the rev-match perfectly every time, esp if you're doing a heel-toe. I think it's also harder on the synchro.
My DIY e-bike has regenerate braking. It makes no meaningful difference for the battery charge. But in terms of brake pad life, they do seem to last about twice as long as before.
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Anecdotally, every car I've been in where the driver talks about engine braking is rode hard and put up wet. Humans seem pretty bad at downshifting/engine braking outside of vehicles designed for that purpose like big rigs. Cars have much fewer gears so it's harder to align the downshift. Of course there's little use in having this conversation since we all think ourselves above average drivers. I've had acquaintance…
automatic transmissions engine brake as well. most drivers don't use it, a shame. I can smell the ozone on long descents. if they downshifted their automatic, hardly any braking would be needed would be needed.
There are _moments_ where I would like to exercise more control, like the long downhill example or maybe staying in a low gear in bad weather.
But, I'm still unconvinced that engine braking on a manual transmission in a consumer sedan for every stoplight is helpful. Cars weigh a lot, simply let off the gas a few seconds earlier.
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I have the Hyundai Kona, which I'm pretty sure is just their version of the Nero (same 64kWh battery at least). I'm on my original tires after 44k miles.
I also have a Kona and I had to replace mine at around 30k.