Is One Pedal Driving Mode Slowing us down??

[N1naz]

Hello,

Has anyone else noticed when under a constant light to medium acceleration, or constant speed, when switching one pedal mode on and off, when on there is a slight drag IE It feels like power is being held back, almost as if its in regen at the same time as accelerating.

I did a search for this but didn’t come up with anything if it’s been covered before, please let me know.

George

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[Doobster6]

I notice that when I switch between driving modes, that the car also seems to slow or speed up, which I know is actually the software re-interpreting the accelerator pedal position relative to how its mapped in the different modes. This is especially apparent when changing down, say from engage to whisper; it feels like a drag is being introduced and the car slows a bit, because it actually IS; 45 mph in Whisper requires that the pedal be slightly further along its travel than when in the higher modes.
I think something similar is happening when you’re switching OPD on and off. When it’s on, the car’s speed is governed by pedal position because the electric motors and pedal are directly connected. When it’s off, the car can ‘coast’ and (for a short while) appear to maintain its speed through momentum. So when you switch it back on, the motors hook back up to the pedal position and even a slight change there will in fact change the electric motors’ speed, and hence the car’s as well.

 

[Londonboy49]

Why switch between. I use 1pd constantly. Love it.

 

[N1naz]

Why switch between. I use 1pd constantly. Love it.

I realy don't switch between them, just noticed it.?‍

 

[ChuckUK]

Why switch between. I use 1pd constantly. Love it.

I’ve tried it a few times, but muscle memory of wanting to plant it like the brake keeps me from using it. I think that if I had only ever driven a car with OPD then it would be great, but I’m too resistant to change.

 

[McSquashy]

I like the idea of 1PD, but discovered that I didn't like using it. Like you, I felt as though there was a constant drag on the car. It made driving my MME feel labored. That, along with the heavier steering and stiffer ride, made daily driving feel more like an unpleasant chore. I still wish the suspension was more compliant and the steering lighter, but the combo of all three was tiresome.

 

[MadMatt]

I’ve tried it a few times, but muscle memory of wanting to plant it like the brake keeps me from using it. I think that if I had only ever driven a car with OPD then it would be great, but I’m too resistant to change.

I find this odd, well your the first person to express this anyway.

We’ve all been driving 2P cars all our lives. After a week of 1P I can honestly say it feels more natural, more precise and smoother.

i think what the OP is saying is under 1P there’s a lack of that coasting feeling, which is true. It’s hard to find that exact pedal spot based on current elevation change and wind resistance so the car is neither using or gaining energy.

One way or another there’s always some minor torque being applied in either direction. While true, I see it as a good thing. At that sweet spot the car can still “coast” while gaining a little amount of energy back vs it being lost to the wind or brake pads. During that moment you do get a “heavy” feeling on the go pedal. Because your the one driving and anticipating the feedback from your input, you loose the coasting effect you would normally feel while having your foot completely off the pedal.

 

[ChuckUK]

I find this odd, well your the first person to express this anyway.

We’ve all been driving 2P cars all our lives. After a week of 1P I can honestly say it feels more natural, more precise and smoother.

i think what the OP is saying is under 1P there’s a lack of that coasting feeling, which is true. It’s hard to find that exact pedal spot based on current elevation change and wind resistance so the car is neither using or gaining energy.

One way or another there’s always some minor torque being applied in either direction. While true, I see it as a good thing. At that sweet spot the car can still “coast” while gaining a little amount of energy back vs it being lost to the wind or brake pads. During that moment you do get a “heavy” feeling on the go pedal. Because your the one driving and anticipating the feedback from your input, you loose the coasting effect you would normally feel while having your foot completely off the pedal.

I agree on the lack of coasting, but it is the same as driving in untamed mode with TPD. This is how I usually drive, as it gives the benefit of OPD, with hardly ever having to use the brake, but the brake pedal is still used for the final stop.

I problem I had with OPD is that after I lifted my foot to come to a complete stop, I then accidentally touched my foot on the peddle. When the car started rolling slowly forward, my instinct was to plant my foot as if I had eased off the brake. Thankfully I realised that would be a silly mistake and reverted to TPD. I’ve tried OPD a few times since but the worry of getting it wrong stops me. I do also drive my wife’s car and a van, which probably helps prevent me from adjusting.

 

[Doobster6]

I find this odd, well your the first person to express this anyway.

We’ve all been driving 2P cars all our lives. After a week of 1P I can honestly say it feels more natural, more precise and smoother.

i think what the OP is saying is under 1P there’s a lack of that coasting feeling, which is true. It’s hard to find that exact pedal spot based on current elevation change and wind resistance so the car is neither using or gaining energy.

One way or another there’s always some minor torque being applied in either direction. While true, I see it as a good thing. At that sweet spot the car can still “coast” while gaining a little amount of energy back vs it being lost to the wind or brake pads. During that moment you do get a “heavy” feeling on the go pedal. Because your the one driving and anticipating the feedback from your input, you loose the coasting effect you would normally feel while having your foot completely off the pedal.

Great reply. It took some time for me to get used to it, but now I LOVE 1PD. It’s one of the reasons I won’t willingly go back to ICE cars. I can usually stop as needed without ever using the mechanical brake pedal, which should save me kaboodles of money in brake maintenance. Being an ex-mechanical engineer, the ability to recapture otherwise wasted energy is almost nerdishly thrilling! I do wonder though whether one would improve their miles/KWh on the highway if it is turned off. 1PD is awesome in stop-n-go driving situations for energy re-gen but I would suspect the reverse would be true on open highways, where being able to coast down slight slopes without feeding the motors energy would be the best choice. Thoughts anyone? Perhaps there is a neutral position within the pedal travel?…….

 

[AliRafiee]

In 1P, the application of accelerator is different since it has to start slowing when you start to let off. The start of acceleration point of the throttle is lower than without 1P. Since you have the throttle at X point and you turn off 1P, the car will accelerate.

 

[MachSteve]

I’m not sure about it slowing us down but I can say that I got my car last Saturday (17th) and I started using 1P maybe 2-3 days ago and I’m lovin’ it!

I haven’t done much highway driving using the 1P so I wouldn’t know how it rides on the highway but I’ll being some driving over the weekend.

 

[phil]

I like the idea of 1PD, but discovered that I didn't like using it. Like you, I felt as though there was a constant drag on the car. It made driving my MME feel labored.

It's a little like driving with a manual transmission. Probably that's one reason why I do like it.

 

[mburtsvt]

When I lift my foot from the accelerator it seems to slow down. If I don't. press down on the accelerator it will come to a complete stop. Very strange.

 

[garyd9]

I've been driving in 1 pedal mode since I got the car. I can assure you that it's in no way slowing me down.

 

[Space_Pony]

I have to drive several different vehicles during the week and since I drive more miles in the other vehicles without 1pd, I went back to 2pd. There was just too much difference and continuously switching driving styles was no fun.

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