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Tesla removes regenerative braking strength option
- Thread starter DS8819
- Start date
You can get better range by NOT using regen or brakes so much.
EDIT: Since some people decided to disagree since they may not understand physics, let me rephrase and expand my above original comment
Brakes < Regen < Coasting
From a strictly technical standpoint, if you coast to a stop, this is the most efficient. Also, coasting down a hill and burning off the gained speed(from gravity) going back up the next incline, this is also the most efficient. From an energy efficiency standpoint using regen is ALWAYS worse than just coasting, and using brakes is ALWAYS the worst option.
Regen is a great thing for the final few feet(could be a hundred-ish) when coming to a stop. It is also great for sudden slowdowns due to traffic conditions. Maximizing your coasting is best.
EDIT: Since some people decided to disagree since they may not understand physics, let me rephrase and expand my above original comment
Brakes < Regen < Coasting
From a strictly technical standpoint, if you coast to a stop, this is the most efficient. Also, coasting down a hill and burning off the gained speed(from gravity) going back up the next incline, this is also the most efficient. From an energy efficiency standpoint using regen is ALWAYS worse than just coasting, and using brakes is ALWAYS the worst option.
Regen is a great thing for the final few feet(could be a hundred-ish) when coming to a stop. It is also great for sudden slowdowns due to traffic conditions. Maximizing your coasting is best.
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WesB
Member
Any time you use the regular brakes instead of regen is bad for range.
I'll miss this. When I see something strange near the road, I move my right foot to the brake pedal. I do this to be able to brake faster if it turns out the strange thing is a moose or something. That doesn't mean I want to decelerate with max regen.
I guess I could start driving like an American (left foot on the brake), but then I'll be handicapped when I use a stick shift.
I guess I could start driving like an American (left foot on the brake), but then I'll be handicapped when I use a stick shift.
For example if I'm passing a pedestrian crossing, and I have a green, the pedestrian has a red. I don't want to slow down and prepare to stop, but I would normally move my foot to the brake to be ready in case the pedestrian is an idiot.
Yes, Brakes < regen < coasting
@LionXng and @not4antoher Physics. I edited my previous post to help you two along.
pilotSteve
Active Member
Tesla, don't take my regen away! Its one of the BEST things about driving electric..... has been for me since 2012.
I agree ‘Brakes < regen < coasting’Yes, Brakes < regen < coasting
@LionXng and @not4antoher Physics. I edited my previous post to help you two along.
How about when you want to stop the vehicle?
You can coast with regen standard by adjusting gas pedal.
Exactly. For long highway trips, it’s actually more efficient to set regen to Low.
The article does not say they are removing regen, just that they are removing option to set it to ‘low’ vs ‘normal’. Now there’s only normal. No biggie.
I am not that big a fan of electrek. The TMC thread they point to is in the model S section. Since I have a model 3 I dont read that section much at all. Can someone with a newer model 3 confirm that this setting is also removed for the model 3, and more importantly STAYS removed after the car receives its first firmware update (so off the factory firmware onto one of the "standard" versions)?
One thing I totally DONT trust electrek on is doing due diligence before reporting something, so would be good to see if this is across all models, etc.
One thing I totally DONT trust electrek on is doing due diligence before reporting something, so would be good to see if this is across all models, etc.
For those who disagree with the above, read some basic physics
If you use downhill coasting to build up speed (technically, momentum) and then use that momentum on a flat road or to go up an incline, that will always be more efficient than regen, since regen does the same thing but by converting momentum to stored electrical charge, which is not 100% efficient (and thus wastes some of that mechanical energy).
However, in practical terms, regen probably wins since (a) at some point you reach a downhill speed limit and must then slow the car, which is best done via regen rather than brakes, (b) as speed increases you lose more energy to air drag, and (c) regen energy, while less efficient, can always be used for something, even if its not coasting along a flat road immediately after going down a hill (for example, if you hit a red light at the bottom of the hill).
pilotSteve
Active Member
well that could increase EPA rating. These "government approved tests" are always susceptible to micro tweaking so as to "do better on" without actually raising the bar IMO.
Stop the vehicle? There is regen with hold mode. There is brakes if you mis-judge your coasting distance...It's all planning and adjusting your driving when you can foresee that you will need to stop up ahead. There are times that someone will HAVE to use their brakes as well. It is a dynamic driving environment.
Yes I am well aware of coasting with regen standard and have spoken about this at length in the past in regards to the tolerance of the power bar on the screen to get to as close to zero power(pos or neg) as possible.
My original statement that you disagreed with stands however. "You can get better range by NOT using regen or brakes so much."
Or learn how to modulate the accelerator better, but yes, putting to low regen makes that easier but is unnecessary.
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