Model S regen

[neroden]

According to reports the Regen will be user-selectable via the touchscreen:

Good news! As someone switching from a manual transmission with solid engine braking (who wanted more), I'll be cranking that to max right away.

[doug]

Depends on the charge/discharge symmetry of the cells. I don't know about the LiCo or the new LiNiCoAl cells but most of the LiFePO4 cells have higher discharge rates than charge rates.

Yeah, I was just adding a bound on the max regen.

So the max "max regen" is 60 to 0 mpg in 5.6 sec (-0.49 g) based on the drivetrain.
And the min "max regen" is 60 to 0 in 7.3 sec (-0.37 g) based on 90kW charging rate.

[TEG]

Regen discussion:

The Secret to a Great Electric Car? How It Brakes | PluginCars.com

[vfx]

Regen discussion:

The Secret to a Great Electric Car? How It Brakes | PluginCars.com

WOW, sounds like BMW gets it. The Ultimate Regen machine.

Feedback from the MINI E field trial clearly indicated our driver’s preference for aggressive regenerative braking coupled with the ability for “one pedal driving.” This provides immediate feedback that they are driving something special, and is a unique feature of eMobility. The BMW strategy, as demonstrated in the upcoming ActiveE (all electric 1-Series coupe), is to maintain this aggressive regenerative brake feel as a unique eMobility selling point.

How do you strike the balance between maximizing regenerative energy, and providing a braking "feel" that mainstream drivers are accustomed to?
For pure electric drive, emphasis will be placed on the regenerative aspects of the braking system. Ho

wever, for increased driver acceptance, a “sailing mode” has been implemented, allowing the driver to coast at highway speeds – similar to a gasoline vehicle.

Will you provide the ability for drivers to control how much regen is happening via buttons/modes? Why or why not? Other driver-selected controls?
Yes. The ActiveE will be equipped with an “Eco Pro” mode. Once selected, this mode will slightly reduce HVAC and throttle response, and provide additional regenerative braking response. This mode allows the user to place a higher priority on range, extending the driving distance of the car by slightly reducing the creature comforts.

What's your strategy for balancing the benefits of coasting (periods when no regen occurs) versus strong regen (for example, when traveling downhill)?
Allow customer to choose. Due to the one pedal driving, the user can select whether the car is sailing or generating power.

Please please, Tesla please make the S a driver's car. Make it all that it can be.

[rabar10]

...driver’s preference for aggressive regenerative braking coupled with the ability for “one pedal driving.”
This provides immediate feedback that they are driving something special, and is a unique feature...

This.

[Doug_G]

WOW, sounds like BMW gets it. [I]The Ultimate Regen machine.

Please please, Tesla please make the S a driver's car. Make it all that it can be.

+1!!!

[gg_got_a_tesla]

Wow! Looks like BMW is definitely going to nail the entry/mid-level luxury EV market and give Tesla a headache in a couple of years! Blasphemy on this forum maybe, but, I for one would take a BMW 3 or 1 EV over a Model S had it not been for the timelines!

[ckessel]

Wow! Looks like BMW is definitely going to nail the entry/mid-level luxury EV market and give Tesla a headache in a couple of years! Blasphemy on this forum maybe, but, I for one would take a BMW 3 or 1 EV over a Model S had it not been for the timelines!

I don't think it's blasphemy. If Tesla succeeds in creating a market, they're certainly not going to be left alone in it.

[Kevin Harney]

The only draw back on the BMW right now is RANGE !!! They are going with a smaller range for some reason. I own a BMW now and would take this car in a heartbeat IF it had the range I need. They are going for a city car and that will not do for me I think the range is 100 miles or so.

[gg_got_a_tesla]

The only draw back on the BMW right now is RANGE !!! They are going with a smaller range for some reason. I own a BMW now and would take this car in a heartbeat IF it had the range I need. They are going for a city car and that will not do for me I think the range is 100 miles or so.

True. I guess a Leaf-like range with the performance of a BMW?! I can live with that range for a short period (have an ICE backup). I've requested to be notified when the BMW ActiveE registration (for just 700 "electronauts") opens shortly (the Bay Area is included in this program); if I'm selected, I think I might just end up doing the close-end 2-year lease on the ActiveE and take a one-time deferral on the Model S reservation!