One pedal drive - Jerk motion

[AKgrampy]

Nobody suggested this but what if the brakes are a bit rusty/sticky from no use. If all else fails use regular brakes for a bit to clean them off. Just a thought. May not help though.

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[Maquis]

But it’s not turning anything off is what I’m saying, 1PD holds the brakes... Only difference might be not holding when in neutral.

oK ?

 

[Jimbo]

I'm surprised more folks haven't come forward to voice their opinion re: the "lurch" at the end

Agreed. It's only a minor annoyance for me, but all these "you have to feather it"s remind me of apologists for certain other brands. I drive in Engage specifically because its deceleration curve is so perfect for me that I don't need to feather it.

Also, while I find the lurch a minor annoyance, the little bit of reverse you get when used on an incline is just comically bad. Reminds me of a golf cart.

 

[Motomax]

oK ?

Okay, let’s assume Ford created two separate brake hold programs for no reason. Please explain how a feature that activates AFTER the vehicle is stopped would reduce jerking when slowing down?
Im open to being proven wrong, but the placebo effect is real… lol

 

[phil]

I'm surprised more folks haven't come forward to voice their opinion re: the "lurch" at the end when you take your foot off the accelerator pedal in 1-PD [or push the brake pedal] to come to a complete stop.

I think it's because many of us have no lurch. Mine is as smooth as silk.

But then I wonder why they're not all the same...

 

[OH2AZ2OH]

I've not used 1PD in awhile, but I always thought the transition from regen to friction brakes was pretty smooth. There was definitely a jerk if I rapidly lifted off the accelerator, but I don't think that is the OP's concern. I do recommend turning off auto hold, but for a different reason: the amount of accelerator input required to overcome it while backing out of my garage made it feel like I was shot out of a cannon when the car finally decided I really wanted to move.

 

[Motomax]

: the amount of accelerator input required to overcome it while backing out of my garage made it feel like I was shot out of a cannon when the car finally decided I really wanted to move.

Was that in 2PD? In 1PD you can release the brake(using the accelerator) without even moving the vehicle.

 

[Paul H]

In OP mine stops very smoothly until the very last moment, and just as the car comes to a complete stop there is a little jolt. I have tried feathering the pedal until the very end and coming to a long, drawn out stop and I still get the jolt. I also get it when I take off from a complete stop, the same little jolt. It makes me think it is the auto hold engaging when the car comes to a stop, and disengaging when you take off again. If I pull up to a light and it changes to green while I'm still moving even the slightest bit, it doesn't happen when I take off.

 

[OH2AZ2OH]

Was that in 2PD? In 1PD you can release the brake(using the accelerator) without even moving the vehicle.

In 1PD, with auto hold active and in reverse, I had to push the accelerator so far down to overcome the auto hold feature, that when autohold finally decide that I really did want to move, it felt like a drag strip launch. Not fun while backing out of my relatively tight garage.

My sales rep made a big deal about how awesome auto hold was and basically insisted I turned it on. I specifically asked "Doesn't 1PD do the same thing", but he was persistent. I turned it off on day 2.

1PD on and autohold off is better, but it still is pretty easy to get going faster than I like. This is part of the reason I stopped using 1PD. Since the MME uses blended braking even without 1PD, there is no loss in efficiency.

With 1PD off, and auto hold off, I can ease off the brake and slowly/safely back out.

 

[Motomax]

My sales rep made a big deal about how awesome auto hold was and basically insisted I turned it on. I specifically asked "Doesn't 1PD do the same thing", but he was persistent. I turned it off on day 2.

They do do the same thing which is why I find it very interesting that a few of you guys swear by turning it off. There’s zero difference for me. I think the job 1 cars are a little more clunky with brakes.
I think people just need more practice with 1PD and not treat it like and on/off switch like the OP. After 7k miles it’s second nature to me now but the first couple days were a little annoying at slow speeds. Unbridled makes a little harder to be smooth just by the nature of the accelerator mapping.
Now 2PD and brake hold being super jerky I can believe. The creep is relatively fast on these cars which would force you to jump back to the brakes to go slower.

 

[SnBGC]

Excuse my ignorance, but why would this be irresponsible? I'm assuming that after having sold over 1mil Evs, all with aggressive regen, I don't hear any reports on problems with battery overheating from regen. With Tesla, they do limit regen on cold battery or if the battery is near 100%.

I think the problem with FORD is not the amount of regen, but rather the transition point between regen and mechanical braking.

Issues observed with overheating cell tabs, motor windings and loss of efficiency. The heat has to be managed and the energy spent to mitigate the unnecessary heat generated is wasted. Tesla is known for falling way short of their range estimation. The Mach-E is known to far exceed their range. A conservative approach vs a low margin for variables approach.

Don't get me wrong. I don't like the Mach-E 1PD performance and feel either. Tesla is too aggressive IMO but the Jeep Wrangler 4xe and Polestar 2 is excellent in that regard. The Jeep isn't even true 1PD and even that is superior to the 1PD that the Mach-E offers. The two things I would "fix" on the Mach-E is the pedal geometry or lighter resistance spring at a bare minimum. Then remove the regen delay if possible. The eventual level of regen is fine, it just takes too long to get there IMO.

 

[ctenidae]

I told him to buzz off and have no issues.

Did you get your thermos? I picked one out for you.

To the OP - don't rely 100% on the car to stop - it doesn't always do it, or do it where you want. Teslas were stopping like 15 feet away for a little while - had a number of friends comment Tesla drivers were annoying with their short stops.

Instead of just taking your foot off the gas, reduce the pressure slowly so that you lift off just at the end so it rolls to a stop. There has to be a certain level of resistance for the regen to actually generate, and thereby create resistance, so once your forward momentum is below that resistance level the car will stop suddenly, and rock on its springs. If you feather off the pedal you can ease the transition from regen to brake pads, but it takes some practice to get it right. Once you've got it, though, it's great - so hard to switch to a car that doesn't do it!

 

[wattup]

Did you get your thermos? I picked one out for you.

To the OP - don't rely 100% on the car to stop - it doesn't always do it, or do it where you want. Teslas were stopping like 15 feet away for a little while - had a number of friends comment Tesla drivers were annoying with their short stops.

Instead of just taking your foot off the gas, reduce the pressure slowly so that you lift off just at the end so it rolls to a stop. There has to be a certain level of resistance for the regen to actually generate, and thereby create resistance, so once your forward momentum is below that resistance level the car will stop suddenly, and rock on its springs. If you feather off the pedal you can ease the transition from regen to brake pads, but it takes some practice to get it right. Once you've got it, though, it's great - so hard to switch to a car that doesn't do it!

Thank you! That is informative.

 

[Jeffvisor]

Has anyone observed that when One pedal drive is engaged and the vehicle is about to come to complete stop, there is a jerk that rocks the vehicle front and back ?

I am seeing it on my 2021 Premium AWD vehicle, every single time when 1PD is stopping the vehicle.

I have the same car as you do and use 1 pedal full time and have not noticed it.

 

[BillPitman]

What do I need to practice? One Pedal drive is totally controlled by car's mechanism , right?

So when 1PD is engage, I just take my foot off the accelerator and let the car do it's work to get the vehicle to complete stop. Towards the end of the this exercise is when I feel that jerk.

Am I doing something wrong?

You need to learn how to smoothly slow down by modulating the accelerator pedal……. Not a criticism, just a learning curve to 1-pedal usage……
It’s like if you are using cruise control and cancel it, you will not be happy with the abrupt deceleration! Foot really needs to be on accelerator when you cancel cruise……. Just my opinion, but smoothness counts in my driving…. Bill csg

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