One pedal drive (vs) Brake regen

[DadzBoyz]

I adapted to 1pd pretty quickly (had the car just over 2 weeks).
I’m hoping that 1pd also means less brake dust on the rims…

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[Tom L]

I recently tried out 1PD over about 200 miles of driving in a day, over freeway and in town, and absolutely love it. What gets me grinning is coming to and stopping at a stop sign without having to touch the brake pedal at all. I do wonder when the brake lights come on, though.

Brake lights definitely work with 1pd

 

[Space Ghost GT]

I adapted to 1pd pretty quickly (had the car just over 2 weeks).
I’m hoping that 1pd also means less brake dust on the rims…

You’ll just have more rust on the rims from non usage.

 

[Sam2084]

Porsche did all the testing and 1pd is the most efficient way at to operate an EV. Coasting is 100% efficient and regen is definitely not as the battery isn’t capable of taking that sudden impulse. If it was a super capacitor it’s be a different story.

Porsche doesn’t use 1 pedal drive…

 

[Jax_GT]

I recently tried out 1PD over about 200 miles of driving in a day, over freeway and in town, and absolutely love it. What gets me grinning is coming to and stopping at a stop sign without having to touch the brake pedal at all. I do wonder when the brake lights come on, though.

I wondered the same and almost had my wife follow behind on the phone. However, one rainy night, I could see when the brake lights lit up behind me and tested it out. Basically, letting off a little gives you some regen but doesn’t throw the brake lights on immediately. If you go fully off or even mostly, they kick on. You can almost feel the extra grab as they kick on.

 

[DadzBoyz]

You’ll just have more rust on the rims from non usage.

1pd is not perfect l, or, I’m not perfect at 1pd. I tap the brakes at least 1 or 2 times each time I drive.
I’m probably tapping the brakes out of habit to knock rust off the rotors anyway. As long as I’ve been driving, that’s muscle Merlin’s of stuff.

 

[devmach-e]

Porsche did all the testing and 1pd is the most efficient way at to operate an EV. Coasting is 100% efficient and regen is definitely not as the battery isn’t capable of taking that sudden impulse. If it was a super capacitor it’s be a different story.

What makes you think that the Porsche doesn’t do regenerative braking or that the battery can’t handle it?

 

[Guss-E 2021]

Funny to see this post. After seven months without it, I decided to give OPD a try yesterday (New Year and all). Woah so weird. Not sure I love it. I think I wanted to try and reduce brake wear but I also don't want extra rust on the rotars. I also rather prefer the creep forward in 2PD mode. Good info here though.

 

[awp0]

Porsche did all the testing and 1pd is the most efficient way at to operate an EV. Coasting is 100% efficient and regen is definitely not as the battery isn’t capable of taking that sudden impulse. If it was a super capacitor it’s be a different story.

I’ve read about this study, and I don’t fully understand it. Wouldn’t 100% efficiency with coasting require that you’re always in conditions where you actually can coast and not use the brakes? Like no traffic, no stop signs, stop lights, turns, exits, no reason to slow down? That seems pretty unusual to me, outside of long highway stretches with zero traffic.

 

[Space Ghost GT]

Porsche doesn’t use 1 pedal drive…

Correct I’ll make the update.

 

[Space Ghost GT]

1pd is not perfect l, or, I’m not perfect at 1pd. I tap the brakes at least 1 or 2 times each time I drive.
I’m probably tapping the brakes out of habit to knock rust off the rotors anyway. As long as I’ve been driving, that’s muscle Merlin’s of stuff.

You really have to jam on the brakes to get the pads to engage the rotor surface. A tap really won’t do it.

 

[Space Ghost GT]

I’ve read about this study, and I don’t fully understand it. Wouldn’t 100% efficiency with coasting require that you’re always in conditions where you actually can coast and not use the brakes? Like no traffic, no stop signs, stop lights, turns, exits, no reason to slow down? That seems pretty unusual to me, outside of long highway stretches with zero traffic.

Since 1pd driving is not 100% efficient anytime you are using regen you are negative net vs simply coasting. You coast anytime you are not on the gas or the brakes. If you’re used to driving with 2 feet like my brother then there is no coasting. Either gas or brakes all the time (which is 1pd), and then your passengers puke and one get the deserved label of bad driver.

 

[dtbaker61]

I recently tried out 1PD over about 200 miles of driving in a day, over freeway and in town, and absolutely love it. What gets me grinning is coming to and stopping at a stop sign without having to touch the brake pedal at all. I do wonder when the brake lights come on, though.

brakes lights do come on.... when there is a detectible amount of decelleration....

 

[dtbaker61]

If you want to coast, flip it to neutral. It won't regen or use any energy. Pure coasting and way better than 2PD if coasting is your goal.

I would recommend against shifting on the fly unless you have a very steady hand. adaptive cruise control works really well and does adjust the throttle to find 'coast' when possible....

if you have a ODB2 and CarScanner on your phone, you can see exactly kW going in and out

 

[Space Ghost GT]

What makes you think that the Porsche doesn’t do regenerative braking or that the battery can’t handle it?

The c rating of the battery. No battery can act like a capacitor with instant discharge and recharge with near 100% efficiency. Porsche does regenerative braking just not 1pd which causes a negative net vs simply letting off the gas and coasting. 1pd is like driving with 2 feet you are either accelerating or decelerating and since we know regen isn’t 100% efficient then 1pd is not the most efficient way to drive a car. Especially on the freeway also not very comfortable for your passengers. Go brake go brake go brake go brake puke ?

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