Porsche says One-Pedal is not the most effecient

ctenidae

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I use this method, but it's a bit awkward because 1) The L button is in a spot that forces me to take one hand of the steering wheel, sometimes when I might want to have both hands on the wheel and 2) it only has one level of regen. I would prefer something I could squeeze (similar to pressing a brake pedal lighter or harder) to get the amount of regen I want.
You could use the brake pedal for that.
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superdave80

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You could use the brake pedal for that.
No, because the brake pedal ALSO activates the physical brakes at some point (which I have no way of telling when they activate). Hence the term 'Brake Pedal'.
 

Kamuelaflyer

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If so, then that is just as bad on Tesla for not giving the option to the driver
Somewhere along the lines the range rules were slightly tweaked so that range was calculated with the default settings or most used setting (I no longer recall just which exactly). That’s when Tesla eliminated the creep type settings in favor of all regen all the time. For the range ratings.
 

jwhamlin244

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If you use 1PD properly, the driving and braking profile should be exactly the same as driving a traditional 2 pedal. Articles like this assume that we drive 60mph and then just let go of the pedal at the last possible second. That is way too jerky and aggressive, of course there will be some regen loss...and also super uncomfortable for any passenger.

When you approach a stop, you slowly let off the gas pedal to mimic 'coasting', and then you let go of the gas pedal when necessary to come to a complete stop, just like pressing the brake pedal..
 

kltye

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If you use 1PD properly, the driving and braking profile should be exactly the same as driving a traditional 2 pedal. Articles like this assume that we drive 60mph and then just let go of the pedal at the last possible second. That is way too jerky and aggressive, of course there will be some regen loss...and also super uncomfortable for any passenger.

When you approach a stop, you slowly let off the gas pedal to mimic 'coasting', and then you let go of the gas pedal when necessary to come to a complete stop, just like pressing the brake pedal..
That assumes you are coming to a stop and things are cut and dry. When we talk about "coast", we mean zero energy being transferred around the drivetrain. Driving with 1PD means you have to have the exact pedal position for that to happen. If anyone can tell me how to achieve that in the Mach-E with little to no effort, I'm all ears. As it is, there's no power meter for the vast majority of our cars, and I'm not talking about "butt feel" when it comes to accelerating or decelerating.

Again - remember, zero energy going in and out is the goal. Not "close enough".
 


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Porsche Taycan has a clutch but I've never read anything about it being used for energy efficiency. I think it's more for driving dynamics at higher speeds.
Isn't the Taycan a 2 speed transmission? If so, that explains the clutch (or whatever method they are using to change gears). The easiest way to accomplish a mechanical disconnect is via one way sprag device but those might not handle the torque very well.....and they would only function in a forward gear but that would suffice for the discussed application.
 

ctenidae

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No, because the brake pedal ALSO activates the physical brakes at some point (which I have no way of telling when they activate). Hence the term 'Brake Pedal'.
You can tell when the physical brakes grab, usually. Just depress the foot-movable regenerative activation lever in the footwell until your passengers are fully enmeshed in the windshield, and you will know that you have engaged the physical brakes. If you're stepping hard enough to engage the friction brakes, you probably need to engage the friction brakes.

Snark aside, you can kind of feel the texture of the braking change when the friction brakes engage.
 

Creegz

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Interesting, but sound dangerous.

Not easy to reach a paddle when turning. I wouldn’t want to rely on something like that to slow me down in the curves.
Paddles should be attached to the wheel so when you are turning it is accessible, GT, Formula, Indycar, and I think now NASCAR all use paddles which are very accessible. With the case of these though you generally aren't turning the wheel super far when you need to interact with them, or the wheel doesn't turn much to begin with. The exception to this rule is WRC where they use a fairly large push/pull paddle because in their case they need a stationary set of controls. The Formula E regen paddle is a useful concept, but the idea is you should be pulling a paddle like a regen (or even a clutch in many series like the various Formula series) paddle that you shouldn't be needing to interact with it mid-corner.
 

Old_Norm

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Bottom line: Say I commute 40 miles each way five days a week. I drive in Whisper mode and always use regenerative braking. At the end of the fifth day, I will have used less electricity driving that commute with regenerative braking than if I had turned it off and only used the brake pedal each day for five days. Yes or no?
 

MG101

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Bottom line: Say I commute 40 miles each way five days a week. I drive in Whisper mode and always use regenerative braking. At the end of the fifth day, I will have used less electricity driving that commute with regenerative braking than if I had turned it off and only used the brake pedal each day for five days. Yes or no?
All things being equal then you should have used the same amount....kinda
 

Old_Norm

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All things being equal then you should have used the same amount....kinda
How is that possible? With RB I'm putting kinetic energy back into the battery. With friction brakes I'm just turning kinetic energy into heat. If what you say is true why have RB if it doesn't provide more energy than friction brakes?
 

SpaceEVDriver

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How is that possible? With RB I'm putting kinetic energy back into the battery. With friction brakes I'm just turning kinetic energy into heat. If what you say is true why have RB if it doesn't provide more energy than friction brakes?
The presumption about coasting is that you don't use the brakes at all.

That isn't a safe or realistic thing to do in regular traffic. This is why it's an inaccurate assertion that coasting gets you more efficiency. If you don't drive in traffic where braking is necessary, and you don't care that it takes you a long time to slow down from your cruising speed, then coasting is great.

If you drive the speed of traffic, then coasting isn't really any better and may be worse (because you'll be changing your speed according to the speeds of those around you and that often requires you to brake unexpectedly).
 

MachEMaster

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Bottom line: Say I commute 40 miles each way five days a week. I drive in Whisper mode and always use regenerative braking. At the end of the fifth day, I will have used less electricity driving that commute with regenerative braking than if I had turned it off and only used the brake pedal each day for five days. Yes or no?
You can't "Turn Off" regenerative braking, you can only turn off 1 Pedal Drive. With 1 Pedal Drive deselected, the vehicle still uses regenerative braking when you press the brake pedal during normal driving operation.
 

devmach-e

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How is that possible? With RB I'm putting kinetic energy back into the battery. With friction brakes I'm just turning kinetic energy into heat. If what you say is true why have RB if it doesn't provide more energy than friction brakes?
Because when you use the brake pedal, you are still using regenerative braking. The friction brakes are used when the regenerative braking system can't fulfill the stopping request. I.e usually at low speed when coming to a stop. Or in a panic stop situation.
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