One pedal driving, bad for brakes?

[Tfeni52355]

Heard in a conversation that Teslas had problems with their brake pads delaminating when drivers used one pedal driving exclusively. Apparently the pads need to be heated occasionally to keep them functional.

My wife and I have really gotten used to one pedal driving in our MME. Should we occasionally turn one pedal off and use the brakes more consistently?

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[RickMachE]

Easier, switch to N while driving and slow down, then again.

 

[Mach-Lee]

If you're worried, shift the car into neutral before braking a few times. This will use the friction brakes. Maybe do that once every few weeks.

 

[chuckles]

1. Is that really a thing? Maybe under extreme temperature swings?

2. If you want to make it easier to toggle 1-pedal, and only have 2 drivers: make the 3rd driver button (by the a pillar on the driver's door) be a profile _without_ 1-pedal driving. This makes it easy to switch between modes for me (I don't have to fight the sometimes-unresponsive center display, especially when you may be in reverse and the camera mode refuses to exit)

She could do the same and not worry about shifting past neutral while she's driving.

 

[Dzrhino]

Silly rumor, the brake pads will not delaminate from lack of use. Think about how they are made, stored, and shipped. If you look it up you'll see lots of articles about how "cheap, poorly made" brake pads delaminate during heavy use. All the delamination reports involve heavy use, not light use like we are talking about with one-pedal. Don't forget, you still use the brakes a few times a week because of other drivers.

 

[RobbertPatrison]

With the same drive style there is no difference between 1-pedal driving and 2-pedal driving. Friction braking is not used with normal braking because a nifty computer blends in regenerative braking just as much as it would in 1-pedal driving.

 

[Motomax]

Silly rumor, the brake pads will not delaminate from lack of use. Think about how they are made, stored, and shipped. If you look it up you'll see lots of articles about how "cheap, poorly made" brake pads delaminate during heavy use. All the delamination reports involve heavy use, not light use like we are talking about with one-pedal. Don't forget, you still use the brakes a few times a week because of other drivers.

No but they can rust to the rotors and delaminate like the early builds lol. Honestly, brake pads are cheap no need to worry about it.

 

[Mirak]

I am trying to envision the driver who is so good with timing the 1PD that they never need to use their brake pads. It would seem to me that you’re going to use your brake pads regardless. Enjoy 1PD.

 

[Regularmache]

Yes I would agree, brakes are going to last a very long time either way. Our Hybrids all went over 100,000 miles, and the brakes still had pad left.

 

[ChuckA]

I use braking occasionally to replace old rotor rust with newer rotor rust. The reason is to keep the rotors from pitting.

 

[Mach-Lee]

Silly rumor, the brake pads will not delaminate from lack of use. Think about how they are made, stored, and shipped. If you look it up you'll see lots of articles about how "cheap, poorly made" brake pads delaminate during heavy use. All the delamination reports involve heavy use, not light use like we are talking about with one-pedal. Don't forget, you still use the brakes a few times a week because of other drivers.

Delamination does happen on EVs sometimes because the backing plate rusts and pushes the pad material away. It's caused by moisture buildup. On regular cars the pads get hot enough to drive the water out of everything, which prevents rust. On EVs the pads don't get hot enough very often, and moisture can get trapped under the pad material especially after driving in rain. The rotor surfaces can also rust, which causes reduced brake performance until the rust is worn off. EV's can actually have very poor braking performance in a panic stop situation if the brakes are hardly used.

I am trying to envision the driver who is so good with timing the 1PD that they never need to use their brake pads. It would seem to me that you’re going to use your brake pads regardless. Enjoy 1PD.

Actually if you only use 1PD and never hit the brake pedal, it will not use the brake pads at all until you come to a complete stop (just to hold the car). There are some days I never use the brake pedal, only have to for some stupid drivers.

Cruise control will use the friction brakes if it has to slow down abruptly for a speed limit drop or a car pulling in front of you.

 

[frontrunner]

Heard in a conversation that Teslas had problems with their brake pads delaminating when drivers used one pedal driving exclusively. Apparently the pads need to be heated occasionally to keep them functional.

My wife and I have really gotten used to one pedal driving in our MME. Should we occasionally turn one pedal off and use the brakes more consistently?

AFAIK, Teslas don't have the option with their braking. I test drove a Tesla and was told it was mandatory one-pedal driving.

 

[kltye]

With the same drive style there is no difference between 1-pedal driving and 2-pedal driving. Friction braking is not used with normal braking because a nifty computer blends in regenerative braking just as much as it would in 1-pedal driving.

This x10000. One-pedal driving is not some special braking regime; it behaves exactly the same as pushing the brake pedal, except it remaps the go-pedal so it also slows down the car. The amount of slowing down (in Gs) is what determines if friction brakes are used, not which pedal is used.

One major reason I didn't get a Tesla is because of their stupid mandatory 1PD; pushing the brake pedal only activates the friction brakes every time. I detest 1PD, so I couldn't deal with that.

 

[gpgrim]

Okay, so here's a brief rant on the MME braking system and its interplay with adaptive cruise control and 1-pdl that I don't particularly care for.

I have frequently been traveling at pace, say >50 MPH, on a congested highway, or 2-lane road, with ACC engaged, when the vehicle directly ahead of me slows due to traffic ahead. If I let ACC do its thing, it will of course decel based on the closure rate with the vehicle ahead. Most of the time this rate is pretty benign and I let the algo do its thing.

However there are times when as sentient being with x-ray vision, I can see the rate of decel should be increased to provide margin, comfort, and protect my prize pony. At this point when I "gently" apply brake pedal, the not so speedy processors disengage ACC, which disengages regen, and then waits for half a sec to acknowledge, "oh, he's applying the brakes, so let's reengage regen."
In that half a heart beat, at the time you're trying to command an increased decel, the car lurches forward after being freed from resistance. It's very brief, but noticeable, as I have had passengers give me the "wtf" look.

At this point the heart rate spikes, and the foot reflexively digs into the brake pedal and all is good, except for the momentary pulse and respiration jump.

Dunno what's the root cause of this behavior, say faulty logic, or system architecture, but it's rather annoying and potential safety risk for folk who have slower reflexes.

 

[ocr_salty]

Didn’t someone on here say once that the braking system itself is intelligent so if you press the brake pedal the car will use regen first and then mechanical braking last?

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