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by theluketaylor 1793 days ago
We're seeing lots of competing ideas about regen braking interfaces and I'm curious which will win.

Tesla is riding hard for brake pedal == friction braking, which is certainly conceptually simple. Lift off accelerator and you get regen braking. Press brake and you get friction braking. Tesla did take away the options about regen strength (at least on my model 3) and now it's only highest. I bought my tesla this winter and it was extremely noticeable how much regen was affected by a cold battery. I had to be very careful not to assume too much regen and after a whole spring/summer/fall cycle of consistency I'm slightly worried about being too one pedal complacent.

Hyundai/Kia has repurposed steering wheel paddles to add or remove regen strength on the fly and now ionic 5 will dynamically adjust the regen using the front facing cameras to slow you down as smoothly as possible.

Most of the euro brands are all embracing D/B modes on the shifter, with D being limited or no regen and B turning it on (and often with strength settings from there).

Porsche has gone full blend, with the ability to freewheel the rear axle and only the brake pedal being used to slow down. The first amount of travel is regen only, then they slowly blend in friction brakes.

I'm sure there are other patterns out there. It's been a long time since something so fundamental to driving has been open for new concepts, so it'll be interesting to see what wins.

2 comments

Yeah I've had my Tesla for a couple of years in California and even in our mild weather the seasonal differences in one pedal driving are something you have to pay attention to.

I haven't tried the other methods, they sound worse to me but perhaps I'm just used to the Tesla approach.

Hmm. This seems quite dangerous.

In snow, if sliding starts due to braking, the best solution to regain control is to stop braking. Completely.

With manual transmission this is simple, deploy the clutch. With an classic automatic, no gas = mild drag due to engine.

But to add regen braking automatically, hmm. It means that in some circumstances, you have zero control, and the car is essentially actively working to mess up your day.

There are ways to detect slide, I wonder, does regen cease if slide is detected... just as with normal brakes and ABS studder (which doesn't reduce braking distance, but provides for steering when slide + braking)?

Yes, regen does cut if the car detects slip (at least in Teslas)