Ford Lightning one pedal drive

[electricpig]

If the exact same truck slows from the same speed on the same stretch of road at the same temperature but uses a different amount of energy depending on whether it's in one pedal or two pedal mode, where has the extra energy gone?

The law of conservation of energy says the energy has to go somewhere (paraphrasing and simplifying) so where did it go? Why would Ford engineer a system that needlessly uses energy?

As I stated multiple times, personal experience and use case which is mostly suburban driving. Long distance highway travel I can see being different. And yes conservation of energy. Using 2PD and regeneration at "100%", the deceleration "feels" substantially less than if you fully release the accelerator while using 1PD. If this is in fact the case, then this strongly suggests that 1PD is returning more energy due to that conservation of energy. But to be fair, I have to quantifiable way to measure this. Again, for me it has been positive for my use case, and much easier to get best potential iMHO. But people making statements like their opinion is absolute facts, are well suspect at best

I point again to Lightning Mike YouTube channel and his test on the same loop. I have some concerns about equivalency of conditions for his test, but it's probably about the best he could do in real world conditions with weather, wind, and traffic.

My own real world use case 26 mile round trip commute, same stretch of road, same times, multiple attempts, similar weather 1PD results in about 0.3-0.4 m/kwh increase in efficiency. Result is my lifetime is 2.7 m/kwh through two winters, one summer probably about 80-85% suburban driving 50-55 mph or less with terrain with elevation changes of up to about 1200', but mostly in the 50-500' in typical driving.

Drive what suits you, I will do the same. But making claims of opinion as though they are absolutely fact is especially with no quantifiable data is over reaching.

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[electricpig]

@electricpig The bottom line is that the truck is capable of the same amount of regen regardless of which drive mode you are in. It is strictly driving behavior (holding other outside influences like weather constant) that determines efficiency. I drive 2 pd exclusively and average 2.7mpk on my commute, 2.5 lifetime (lower due to road trip efficiency knocking it down).

While you claim you drive the same, I would be willing to bet there are subconscious biases in your driving. A more fair test would be to have a different driver who prefers 2pd driving take it on the same route and see if they can match your efficiency.

That is your assumption that both modes are the same capabilities. We have nothing to back that up. Seeming differences in apped of deceleration between modes at "100%" suggest they aren't in fact the same. But again, I have no way to measure that, and is in fact anecdotal. Just know my personal use case, I got substantially better in 1PD.

Yourilage.my vary as they say.

 

[electricpig]

In any event, I'm done with this. Do what fits you, but nobody has an absolute answer because we don't have the needed data

 

[Zprime29]

That is your assumption that both modes are the same capabilities. We have nothing to back that up. Seeming differences in apped of deceleration between modes at "100%" suggest they aren't in fact the same. But again, I have no way to measure that, and is in fact anecdotal. Just know my personal use case, I got substantially better in 1PD.

Yourilage.my vary as they say.

No one is claiming universally one is better than the other, nor did I claim you should be getting similar results. I said the truck is capable of it. How about this, using an OBDII reader we record the energy flowing into the battery from fully lifting off the pedal and compare that to the energy flowing in while using the brake pedal. That would definitively prove the truck's capability. Whether or not we take full advantage of the capability is irrelevant. It's there for those to want to strive for it.

 

[Henry Ford]

And yes conservation of energy. Using 2PD and regeneration at "100%", the deceleration "feels" substantially less than if you fully release the accelerator while using 1PD. If this is in fact the case, then this strongly suggests that 1PD is returning more energy due to that conservation of energy.

The extra energy has to go somewhere. For instance, there could be an incandescent light bulb that is powered in one driving mode but not the other. That would explain where the energy goes. That would be a terrible use of energy but it would explain it.

I've yet to hear a theory on how 1PD and 2PD differ in how they use energy. Logic says they don't but maybe there's some reason to use more energy in one mode.

 

[Daragh]

Nope don’t use it, sport mode in normal pedal mode for me .

 

[RickKeen]

I've yet to hear a theory on how 1PD and 2PD differ in how they use energy. Logic says they don't but maybe there's some reason to use more energy in one mode.

Purely conjecture, but likely in 1 pedal mode, lifting the accelerator pegs the deceleration to a set percentage of regen at whatever speed you are at. 1 Pedal never engages the friction brake (unless you also press the brake pedal).

In 2 pedal mode, usually when you first engage the brake at 65 MPH, you have to be careful not to exceed 100% regen and engage the friction brake. You might not notice because by the time you look at the meter, you have slowed down into the range where it can easily do 100% regen.

 

[jthiesse13]

Hey, just curious how many of you use the one pedal drive. And how much mileage you find it actually adds.

I only drive in one pedal mode.

 

[potato]

How about this, using an OBDII reader we record the energy flowing into the battery from fully lifting off the pedal and compare that to the energy flowing in while using the brake pedal. That would definitively prove the truck's capability.

Better than regen to the battery, I have used my OBD reader to show the hydraulic pressure in the brake system during a typical 2PD stop that showed 100% energy returned. The brake pressure is zero. No friction brakes used (except at the end to hold the stop). I've posted the graph from CarScanner in one of the several other threads on this topic.

 

[Henry Ford]

Purely conjecture, but likely in 1 pedal mode, lifting the accelerator pegs the deceleration to a set percentage of regen at whatever speed you are at. 1 Pedal never engages the friction brake (unless you also press the brake pedal).

In 2 pedal mode, usually when you first engage the brake at 65 MPH, you have to be careful not to exceed 100% regen and engage the friction brake. You might not notice because by the time you look at the meter, you have slowed down into the range where it can easily do 100% regen.

Exactly! You've just illustrated how driving technique is the significant difference between the modes. If the friction brakes are engaged more energy is lost via heat in the brake pads and discs.

 

[Firn]

Hahahaha, like you are all knowing, can't be wrong. Seems you were describing yourself. You have ZERO real data. Just ancestral, which is suspect. And to show just how good your observations are, I barely participate here, so your "explained several times" nicely demonstrates the reliability of your anecdotal data.

It's always funny when the guy disagreeing with evey one in the thread claims it's others who refuse to listen.

Nope, we just refuse to listen TO YOU, because nothing said has shown it's a worthwhile effort.

But hey, I have only driven a few hundred miles with scanner active. It also seems like reading the names at the top of posts in a thread is "anecdotal", lol

 

[f15zmark]

No one is claiming universally one is better than the other

I claim that one pedal driving is definitely better — except for those people who can’t figure it out or don’t want to. I’ve been doing it for over 10 years on various vehicles. It is clearly superior.

 

[Firn]

I claim that one pedal driving is definitely better — except for those people who can’t figure it out or don’t want to. I’ve been doing it for over 10 years on various vehicles. It is clearly superior.

It's a pretty big claim to state that 1pd drive is better for everyone.

Thanks but no thanks, with two lane county roads and lots of cruise control it is decidedly not better or superior.

 

[MotoGary]

Everyone will choose the mode that best suits their individual situation. But let's be very clear on one thing: One pedal Sneetches are no better than two pedal Sneetches!

 

[f15zmark]

It's a pretty big claim to state that 1pd drive is better for everyone.

Thanks but no thanks, with two lane county roads and lots of cruise control it is decidedly not better or superior.

I didn’t say for everyone. I specifically said that it is not for those who can’t figure it out or don’t want to.

I live out in the country and use it all the time. Grew up on 2 pedal driving. 1 pedal is better for me. Took a couple hours to get used to it. That was 10 years ago.

Having one steering wheel to steer in both directions is better than one steering wheel to go right and another wheel to steer left!

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