Differences Found in Range Capacity When Using 1-pedal Drive vs. Not Using it

[HuntingPudel]

Also switching the dial to neutral will give you the most rollout.

Yup, because that's the only way to not produce any regenerative braking.

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[goodguy]

Yup, because that's the only way to not produce any regenerative braking.

Correct. Not needing to brake at all is more efficient than regenerative braking. Less acceleration before a signal thus eliminating or minimizing the need to regen brake IS MORE EFFICIENT. In both cases I am assuming no friction brakes. Friction brakes are the worst of all options.

 

[Blairwarlock]

There is a huge flaw in this test. in 2PD, the car will continue going once it's decelerated to 4MPH. It will never stop in 2PD without using the brake pedal. 2PD never applies the brakes (outside of emergency stop situations). 1PD applies the brakes when needed depending on go pedal angle and current vehicle speed (emergency stop situations notwithstanding). So of course in 2PD a car is going to go farther than in 1PD since it's never going to stop without intervention (either an obstacle or depression of the brake pedal).

Ok sorry I came up with this test as I was typing so I didn’t have time to think through the flaws But you don’t need to come to a stop. You can determine distance traveled from off throttle using whatever measurable variable you want like a physical road marker or even to what point you reach a specific speed over 4MPH. The point is not to see how far you can coast as we know you can shift to N and coast even longer. The point is to answer the OP’s question indirectly as to whether there’s a difference in range between 1PD and 2PD. And while of course this is highly based on driving style, route, etc., my argument is on long distance open highway: would you get more effective range by not engaging 1PD? I believe the answer is yes. I’m just curious as to how material that difference is.

Here’s a question: on a full charge assuming 300 mile range, can you make it down a 325, 350 or even 400 mile decent in 1PD vs 2PD? Using only D gear and where the incline angle is such that it allows 1PD to come to a near stop without using the brakes. Or using the same example, where would your battery range be in both cases at mile marker 50, 100, 200, etc.

 

[Kamuelaflyer]

Differences found in range capacity when wearing shoes vs. wearing flip flops. Seriously?

Range capacity varies between people.

Slippahs. Flip flops are so mainland.

If I'm spending time in Kona I wear them. Do I get different range results? No clue. The trip down there takes 4% soc (50 miles one-way, a net downhill by an awful lot). The round trip takes 25% to 30% depending on how lead-footed I am, and that has nothing to do with footwear. Foot wearer? Yes. Slippahs or running shoes? no.

 

[ChrisO]

Ok sorry I came up with this test as I was typing so I didn’t have time to think through the flaws But you don’t need to come to a stop. You can determine distance traveled from off throttle using whatever measurable variable you want like a physical road marker or even to what point you reach a specific speed over 4MPH. The point is not to see how far you can coast as we know you can shift to N and coast even longer. The point is to answer the OP’s question indirectly as to whether there’s a difference in range between 1PD and 2PD. And while of course this is highly based on driving style, route, etc., my argument is on long distance open highway: would you get more effective range by not engaging 1PD? I believe the answer is yes. I’m just curious as to how material that difference is.

Here’s a question: on a full charge assuming 300 mile range, can you make it down a 325, 350 or even 400 mile decent in 1PD vs 2PD? Using only D gear and where the incline angle is such that it allows 1PD to come to a near stop without using the brakes. Or using the same example, where would your battery range be in both cases at mile marker 50, 100, 200, etc.

Getting way to theoretical for me.

Considering that the range is going to be dominated by just cruising along at highway speeds, hopefully with cruise control on, I certainly wouldn't be concerned about the rest.

Nice to wonder about it, but in 99.99% of cases it really wouldn't have any practical use cases.

This kind of thing actually has been carried out, not 1 Pedal vs 2 Pedal, but as has been stated before "how you drive" will be so much more important than the difference of 1 Pedal vs 2 Pedal, I don't think it would really matter:

https://www.wikihow.com/Hypermile

 

[HuntingPudel]

Ok sorry I came up with this test as I was typing so I didn’t have time to think through the flaws But you don’t need to come to a stop. You can determine distance traveled from off throttle using whatever measurable variable you want like a physical road marker or even to what point you reach a specific speed over 4MPH. The point is not to see how far you can coast as we know you can shift to N and coast even longer. The point is to answer the OP’s question indirectly as to whether there’s a difference in range between 1PD and 2PD. And while of course this is highly based on driving style, route, etc., my argument is on long distance open highway: would you get more effective range by not engaging 1PD? I believe the answer is yes. I’m just curious as to how material that difference is.

Here’s a question: on a full charge assuming 300 mile range, can you make it down a 325, 350 or even 400 mile decent in 1PD vs 2PD? Using only D gear and where the incline angle is such that it allows 1PD to come to a near stop without using the brakes. Or using the same example, where would your battery range be in both cases at mile marker 50, 100, 200, etc.

I think that there have been enough discussions on 1PD vs 2PD that indicate there's no difference in efficiency(a lot of the people who have posted questions about efficiency have the opposite opinion to yours, thinking 1PD is more efficient). Similar questions have been posted about Whisper vs. Engage vs. Unbridled. It's all in as @ChrisO said: "How you drive." Control of go pedal position and rate of change of position is vitally important (throttle trace data for race car drivers who are really good at saving fuel bear this out). Taking your foot completely off of the go pedal in 1PD will eventually apply the mechanical brakes. Laying off of the go pedal without allowing it to come to its full rest position in either 1PD or 2PD will modulate the amount of regenerative braking being used, which modulates the rate at which the car is slowing down.

 

[Kawika]

I'mdriing full time Unbridled with 1 pedal on.It seems to be more agressive regen than other modes.
Odd thing is when I charge at home,same charger for 2 yrs and the full charge mileage has increased after a charge. Not alot, but haven't seen it in other modes.
My whisper mode driving,even in one pedal kept going down over the first year.
Unbridled in one foot is better by a little bit,but a hell of alot more fun to drive in mode.

 

[superdave80]

The trick is to develop the muscle memory for where the neutral position is on the accelerator. That's where the car coasts and doesn't apply power or do regen.

Also know as the 'foot-off-the-accelerator' position for us 2pd drivers... (in whisper mode)

 

[Adventureboy]

Ok, so I like facts and did a test last night on my Lightning. @Teslaeata is correct - there is a small amount of regen that occurs in 2PD when there are no pedal inputs. It was regenerating at about 20kw vs. 125kw at about 60mph on 1PD (about 20%) as indicated in CarScanner. It quickly ramps down as the speed drops and settles with power being supplied to the wheels at 3-4mph until the brake is pressed. In a small decline of about 1% grade, it wasn't enough to slow the truck but it was slightly noticeable when shifting to Neutral when regen stops completely. When pressing the brake pedal in 2PD at 60mph, regeneration again jumped back to about 125kw and tapered off as the truck slowed - same as 1PD.
I will test the MME when I get the chance, but I expect it will work exactly the same.

 

[Teslaeata]

Ok, so I like facts and did a test last night on my Lightning. @Teslaeata is correct - there is a small amount of regen that occurs in 2PD when there are no pedal inputs. It was regenerating at about 20kw vs. 125kw at about 60mph on 1PD (about 20%) as indicated in CarScanner. It quickly ramps down as the speed drops and settles with power being supplied to the wheels at 3-4mph until the brake is pressed. In a small decline of about 1% grade, it wasn't enough to slow the truck but it was slightly noticeable when shifting to Neutral when regen stops completely. When pressing the brake pedal in 2PD at 60mph, regeneration again jumped back to about 125kw and tapered off as the truck slowed - same as 1PD.
I will test the MME when I get the chance, but I expect it will work exactly the same.

Can’t remember the last time I used Stangy’s brake pedal

 

[Adventureboy]

Can’t remember the last time I used Stangy’s brake pedal

Only when the idiots make me.

 

[Kamuelaflyer]

Only when the idiots make me.

I was following a star white mach-e going to Kona today. Unusual in and of itself, but what was more unusual was how often I had to brake. They were going Speed Limit -10 to -15 on a road where the average speed is Speed limit plus 7.

 

[goodguy]

Ok, so I like facts and did a test last night on my Lightning. @Teslaeata is correct - there is a small amount of regen that occurs in 2PD when there are no pedal inputs. It was regenerating at about 20kw vs. 125kw at about 60mph on 1PD (about 20%) as indicated in CarScanner. It quickly ramps down as the speed drops and settles with power being supplied to the wheels at 3-4mph until the brake is pressed. In a small decline of about 1% grade, it wasn't enough to slow the truck but it was slightly noticeable when shifting to Neutral when regen stops completely. When pressing the brake pedal in 2PD at 60mph, regeneration again jumped back to about 125kw and tapered off as the truck slowed - same as 1PD.
I will test the MME when I get the chance, but I expect it will work exactly the same.

For 2 Pedal Dr. it depends what mode you’re in cause you can totally feel that whisper is less regen than engaged and unbridled

 

[devmach-e]

The statement is absolutely true. On my MME in 2PD, regenerative braking is applied when you press the brake pedal. There is no regenerative braking when I release the throttle in 2PD. This is the difference between 1PD and 2PD.

Only if you are in Whisper, and only if you are on a flat road. Going down a hill? Absolutely will kick in as soon as you lift off of the pedal.

 

[goodguy]

Only if you are in Whisper, and only if you are on a flat road. Going down a hill? Absolutely will kick in as soon as you lift off of the pedal.

Not true. Take your foot off the accelerator in 2 pedal mode and switch between modes you absolutely can tel the difference on a flat road that different levels of resistance are being applied depending on what mode. How are we still discussing this. It is obvious.

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