One pedal driving- mechanical question

[PreservedSwine]

I suspect have to hit the brakes aggressively. When you gently use the brakes to slow to a stop, doesn’t the truck use regen instead of the brakes anyway?

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[Tclark5]

If you come to full stop using regen, the mechanical brakes get applied right at the stopping point. So while they are technically “being used”, there’s virtually no dynamic interaction between the pads and rotors. To keep the pads and rotors “clean”, you need to intenentionally engage the mechanical brakes in some manner while in motion. I also use Rick’s method of shifting to ”N” and then braking. There’s no need to “slam on the brakes.”

If you notice during blended braking the power shows 100 percent with brake coach before you stop. So the friction brakes are
engaged under less than 5 mph. There is some force being applied to the pads and rotors. You can look with a flashlight and see the rotors have no rust on them if you drive regularly.

 

[Lightning Rod]

So, just for clarity, when I'm in regular (2 pedal) drive mode, I sometimes lightly apply the brakes and it says 100 percent at the end of the stop... did that mean it was ALL regenerative and no physical brakes were used to stop the truck?

 

[invertedspear]

So, just for clarity, when I'm in regular (2 pedal) drive mode, I sometimes lightly apply the brakes and it says 100 percent at the end of the stop... did that mean it was ALL regenerative and no physical brakes were used to stop the truck?

Yes, or at least as much regen as it would have used if you were in 2 pedal mode. The exception is at the very end, I think below about 3 mph, and it does the same in 1 pedal, you can feel a difference where it goes from smooth regen to gritty disks.

Switch the view on the guage cluster to "power distribution" and you can see that it's regenerating when the brake pedal is used. Until the green maxes out on a motor, then it starts to blend in the disk for additional braking.

 

[Lightning Rod]

Yes, or at least as much regen as it would have used if you were in 2 pedal mode. The exception is at the very end, I think below about 3 mph, and it does the same in 1 pedal, you can feel a difference where it goes from smooth regen to gritty disks.

Switch the view on the guage cluster to "power distribution" and you can see that it's regenerating when the brake pedal is used. Until the green maxes out on a motor, then it starts to blend in the disk for additional braking.

Ok, thank you. I've always been a 1 PD guy but I may start driving 2 PD. I love the thought of regen and not wearing my brake pads out, but I like to coast also. With 1 PD, it seems you're either accelerating, or you're regenerating. I like the fact that you can coast for a while without doing either (I understand that there's regen while "coasting"). I know that this has been an ongoing debate, but I think that 1 PD is not the most efficient way to drive a far as battery consumption, in my opinion.

 

[Calvin H-C]

I wonder how high mileage older EV's like Tesla's are faring at this point in time?

I have a 2017 Ford Focus Electric with just over 155,650 km (96,700 miles). It doesn't have 1PD, but it's shifter has a "L" position that makes the regen more aggressive (i.e. you slow down a bit quicker when coasting in L over D).

With both the FFE and the Lightning, regen is blended with friction braking as needed, with regen being used as much as possible. The ONLY way to NOT use regen is to shift to neutral before pressing the brake pedal.

Prior to having the FFE, we had an ICE Focus, so this gives a pretty good apples-to-apples comparison for the brakes. The ICE Focus needed all four brake pads and rotors at about 65,000 km and again at 128,000 km.

My FFE got only its front pads and rotors replaced at 133,000 km. There was still close to 4 mm of pads, but the rotors were looking pretty pock-marked from what little use they got over their lifetime. The rear brake pads were still over 8 mm at that time, and the rotors were in good condition. Having only one motor at the front, it seems Ford has the front brakes doing most of the work.

As of today, my FFE reports that of the 155665 km it has been driven, 19,663 km came from regen.

 

[davehu]

Materials science, the bearings in the CV joints and motors might wear more than the equivalent ICE transmissions, transaxles & differentials since EV's are dealing with both acceleration and deceleration forces.

I wonder how high mileage older EV's like Tesla's are faring at this point in time?

I expect my brakes to last for a record amount of time. With OPB I almost never touch my brake.

 

[Cvh8601]

Materials science, the bearings in the CV joints and motors might wear more than the equivalent ICE transmissions, transaxles & differentials since EV's are dealing with both acceleration and deceleration forces.

I wonder how high mileage older EV's like Tesla's are faring at this point in time?

Unless the suspension design intent wasn’t achieved, there shouldn’t be any difference in radial forces experienced by the various shaft line bearings from friction or motor braking.

The CV joints and differentials however are another matter. My guess though would be the extra torsion along the shaft lines is negligible when compared to the full power torque they have to be designed to to handle the motor under peak power. So, I’d guess the regen loads are in the ‘infinite life’ category on the CV joints and differentials.

 

[hturnerfamily]

If you'll notice your brake lights, especially at sunset/night time, 1PD is going to turn those lights on, immediately, every time you come off the GO pedal... meaning, the BRAKES are being applied.
Brake lights do NOT illuminate if they are not, whether by the 1PD automated mechanics, or by your own foot.
REGEN, though, on it's OWN, will NEVER cause the brakes to be used, or illuminate the brake lights, since the brakes are NOT being applied, ever, no matter what Drive Mode you are in - you'll notice that even if you let the truck come to an almost complete stop, it never really does, on it's OWN, as it continues to 'creep'... at least if you are not on an incline that prevents it from doing so - and, even then, your brake lights are NOT illuminated, since the brakes, the physical brakes, are not being applied.

BRAKES are totally physical. They are applied, even if not fully, by 1PD and will add to the Regen that slows your vehicle, and ultimately bringing it to a complete stop. The 'amount' that they are applied is in proportion to what the truck calculates as being able to bring the vehicle to a full and complete stop, with the current speed, inertia, weight, momentum, and forces that are currently in play when your foot comes off the GO pedal. It does not hesitate, or wait for REGEN to kick in, no matter which Drive Mode you are currently on - it does it the same no matter. It is not going to SLAM the brakes, it is going to do it in a safe matter, as far as force and speed, that the Ford engineers have designed it to. It is the same, every time, but the experience will be different depending on the speed and circumstances, of course.

As to the question of whether 1PD is 'better' that normal driving, which also depends on the Drive mode, which is varying degrees of REGEN, it will also depend on your driving style, your speed, traffic, how close you follow others, and how quick, how often, and how hard you press the brake pedal.
My own truck just went thru it's 50,000 Ford checkup. The brake pads were checked, measured, and listed as "7" in the fronts, and "8" in the rears. Sounds like the front pads take a little bit more when braking, but it also sounds like, after almost 50,000 miles, there is 70% of the pads left on the fronts, and 80% on the rears... nice. They also commented that my OEM Michelin Primacy XC tires looked brand new. I've also towed our 3,800lb camper over 24,000 of those miles.

I drive in SPORT Mode 99% of the time, no matter whether towing, or not. I do not use Tow/Haul mode, for the most part. I hardly ever use NORMAL mode. SPORT Mode has the most comfortable feel for my driving style. It matters not which mode you use when in CRUISE CONTROL, as the truck now controls the speed, slowing automatically if you approach a slower vehicle, automatic braking if traffic comes to a stop, etc. 1PD is only when 'you' are driving.

Take a drive in the evening and watch your brake lights from your driver's mirror - go through all of the driving modes, 1PD option, etc., and see what happens each time you come off the GO pedal... you might be surprised how often you DON'T see brake lights.

 

[Firn]

If you'll notice your brake lights, especially at sunset/night time, 1PD is going to turn those lights on, immediately, every time you come off the GO pedal... meaning, the BRAKES are being applied.
Brake lights do NOT illuminate if they are not, whether by the 1PD automated mechanics, or by your own foot.
REGEN, though, on it's OWN, will NEVER cause the brakes to be used, or illuminate the brake lights, since the brakes are NOT being applied, ever, no matter what Drive Mode you are in - you'll notice that even if you let the truck come to an almost complete stop, it never really does, on it's OWN, as it continues to 'creep'... at least if you are not on an incline that prevents it from doing so - and, even then, your brake lights are NOT illuminated, since the brakes, the physical brakes, are not being applied.

BRAKES are totally physical. They are applied, even if not fully, by 1PD and will add to the Regen that slows your vehicle, and ultimately bringing it to a complete stop. The 'amount' that they are applied is in proportion to what the truck calculates as being able to bring the vehicle to a full and complete stop, with the current speed, inertia, weight, momentum, and forces that are currently in play when your foot comes off the GO pedal. It does not hesitate, or wait for REGEN to kick in, no matter which Drive Mode you are currently on - it does it the same no matter. It is not going to SLAM the brakes, it is going to do it in a safe matter, as far as force and speed, that the Ford engineers have designed it to. It is the same, every time, but the experience will be different depending on the speed and circumstances, of course.

As to the question of whether 1PD is 'better' that normal driving, which also depends on the Drive mode, which is varying degrees of REGEN, it will also depend on your driving style, your speed, traffic, how close you follow others, and how quick, how often, and how hard you press the brake pedal.
My own truck just went thru it's 50,000 Ford checkup. The brake pads were checked, measured, and listed as "7" in the fronts, and "8" in the rears. Sounds like the front pads take a little bit more when braking, but it also sounds like, after almost 50,000 miles, there is 70% of the pads left on the fronts, and 80% on the rears... nice. They also commented that my OEM Michelin Primacy XC tires looked brand new. I've also towed our 3,800lb camper over 24,000 of those miles.

I drive in SPORT Mode 99% of the time, no matter whether towing, or not. I do not use Tow/Haul mode, for the most part. I hardly ever use NORMAL mode. SPORT Mode has the most comfortable feel for my driving style. It matters not which mode you use when in CRUISE CONTROL, as the truck now controls the speed, slowing automatically if you approach a slower vehicle, automatic braking if traffic comes to a stop, etc. 1PD is only when 'you' are driving.

Take a drive in the evening and watch your brake lights from your driver's mirror - go through all of the driving modes, 1PD option, etc., and see what happens each time you come off the GO pedal... you might be surprised how often you DON'T see brake lights.

We have been over this.

The brake lights WILL turn on WITHOUT the mechanical brakes being engaged.

1pd drive uses REGEN to slow down, NOT mechanical brakes, and the brakes lights absolutely ARE engaged without the mechanical brakes.

Stop spreading false information.

 

[Wendy]

There are brakes on my Lightening?

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