How Electric Parking Brakes Work

[@tripjet999]

Great explanation. I would now like a mechanical handbrake in my vehicle, please!

[@motivpp]

I believe you're literally the only person on KZbin explaining this in such detail! My exact problem is the stupid small seal because it's filling the motor with fluid. Both my motors are shattered inside around the 12 torx gear that spins the caliper side and I just replaced them with TRW motors exactly one year ago. I am not sure if the fluid is causing the shattering but I can't find a rebuild kit that includes that seal. I do have the auto-hold function ON every time the car stops because I love the function. 2009 VW CC vr6 4motion

[@flemmingqvist8326]

Pls Notice: Auto Hold is performed by the cars 4 hydraulic actuated brakes. It has NOTHING to do with the Electric Hand Brake. But nobody knows that !! Untill yesterday I did not know that too.

[@gasparitorumba1099]

You the Man!! Dan!!! After hrs of looking for the breakdown of the caliper I finally found your video.. not even the Haynes manual has this info..the guys at Autozone had no clue.. thank you so much!!!!!!Soo happy you made my day!!

[@spelunkerd]

Excellent break down, thank you. I'm going to review your channel to see if you did the same kind of dissection of the parking brake in older disc brakes. The mechanism is surprisingly complex.

[@michaelpinkston4628]

I have to question Plantary gear sets automatically reverse. I would think they would just reverse polarity

[@badrallach4792]

I agree, surely if it reversed when the piston encountered resistance ( pad hitting the disc/rotor ) the actuator would run back, releasing the parking brake. In fact it would never stop running. What tells it to stop? I imagine it's more like an electric window motor that stops when its closed/opened the window because it measures the drop in current draw. I've seen guys connecting 12v to the terminals of the motor to wind it back and they have to make sure it's the correct polarity otherwise the piston is pushed out. Still a great video to see inside one of these epb calipers.

[@brucehislop8860]

I agree with you Michael. I have some experience with these and indeed they do reverse the polarity to retract the piston. A current sensor in the brake control module is used to determine that the brake is set. Once the motor current hits a preset level, the brake is ON and power is cut to the motor. To release, the module applies reverse polarity current to the motor, the piston retracts and the brakes are released. If it was some type of automatic reverse of the planetary gears, I can see the calipers would easily get out of sync with each other (one caliper is ON and the other caliper is OFF)

[@markw3922]

great video however the motor polarity is switched to back off caliper the neat little gear set is only for torque multiplication here.

[@TurboDodgeXVI]

Thanks for the info dude. Was wondering how an ebrake worked without brake fluid

[@badonmar]

Thank you so much for your explanation. Now I understand how e-parking system work. I think manual brake system is more durable.

[@MrDumbovic]

Great explanation. Thank you.. do you know if the electric brake on 2009 Citroen c 5 can be made to not engage automatically every time you shut off the engine.

[@cory9198]

Love the breakdown.... Would you be able to demo the gear assembly and show how its able to reverse direction?.. Thank you

[@rickh2749]

Is there any possible way they could take a simple system and made it more complicated. Been in the parts business a very long time and some of the things I see engineers do just blow my mind. They have completely forgotten about K.I.S.S

[@jacklantern6339]

Thanks for the information. As a retired mechanic, I was wondering how it worked.

[@stco2426]

Very many thanks for making and sharing this. I was after a video that showed the principles and operation and this hits the spot. Looking to sort a sticky rear brake on a VW and think the EPB mechanism isn't fully releasing properly. After a brake service the pads operate normally, but as soon as I activate then release the EPB, the LH one doesn't retract properly. While I don't want to have to replace the calliper I see little alternative. This is a great video and I'm glad I found your work.

[@battlehrfred]

Now, this is as "Professional as it gets!!! 100-100 perfect!! ty sir

[@1122ss]

Outstanding explanation!!

[@Bachelor84]

Excellent demonstration...

[@jasbirgill6142]

Excellent explanation. Thank you so much.

[@sergejandrejev6070]

Great explanation, I did not find it somewhere else!

[@lloydxt]

very well explained! thanks....you've saved me money! I will avoid buying a car with those brakes!

[@mwwhatever]

Very good explanation. I'm assuming this is the same way that automatic emergency braking systems are able to apply the brakes

[@vinhha6073]

yupt he the one.. the only one taking a part and explains how electric e brake work.. Respect Sir..🫡

[@ricpmateo]

excellent presentation, thanks a lot, so if you don't release first the electronic park brake caliper and go straight the depressing piston you will ruin the seals. I saw in some video, you can release pressure from electronic park brake by using 12 volts battery applied to caliper side of the electrical terminal after first removing the electrical connection from electrical harness and then proceed as usual mechanical way of doing brake pads replacement.

[@adjilZ]

Thanks! I can’t find a replacement for that drive and plunger anywhere.

[@markkenny5799]

That was some great information, Thank you!

[@bernadettevickery7397]

Good explanation

[@automobileservicesadts1122]

Good contents with demo

[@markrainford1219]

How does a planetary gear set automatically reverse?

[@carsten4594]

It doesn't, control module reverses motor.

[@OldSchoolNoe]

I believe the planetary pinions are held, the sun is the input and the ring is the output

[@jw7570]

You’re a pro!!!! Thank you

[@livewoutlimit]

Great video. I was looking for an answer to see if the actual piston needs to be spun back in to the caliper while compressing. Almost every how-to video I've seen on a MK7 Golf does it this way. Based on this video, there's nothing that spins the actual piston, meaning it just needs to be pressed back in like any other models. Someone chime in?

[@nombreapellido9038]

Very nice explanation sir! Thank you!

[@rpap5322]

Here is a question for ya.... i have seen folks use a 9 volt battery connected to the motor to retract it....... my question is how much DC current will the EPB motor be able to take.. like 12 to 15 volt DC ? is there a maximum amount of voltage the EPB motor is rated for ????

[@elky82]

current and voltage are different, they can take 18-20 volts for short periods of time though

[@jamaleldinkhaled9649]

The best Video I ever have this week 😍😍

[@jackmil2467]

Thank YOU. Spasibo

[@Align700nitro]

Great video, and it's the bs like this makes car expensive.

[@taymus13]

So from this and acouple other videos Ive seen, it looks like the mean point of this setup is to keep the main aspect of parking brakes, but in causes of emergency braking it doesnt skid and is ment to make stopping abit safer then face planting into your dash. This assesment checkout for those who know more then me?

[@tinof5829]

Interesting! Thank you.

[@zoltanbatiz]

Thanks to this video, I may re-think buying a car with an electronic parking brake. At least until there’s no more choice for the “old school” type. With all those parts, I can only imagine the repair costs involved JUST for that component.

[@the_expidition427]

Vehicles are being engineered more toward engineer type people and making dealers money planned obsolescence, lack of repairability by the normal user. Manufacturers are looking to phase out the backyard mechanics so normal people bring it in to a dealer. For those in technical fields IT and Engineering this is no issue.

[@jaisonxaviour4769]

Clear Explanations . Thank You

[@belal29customs]

Good job sir

[@stuffoflardohfortheloveof]

Brill vid. Thanks for posting 👍🙂🏴󠁧󠁢󠁷󠁬󠁳󠁿

[@fatpandaproductions9833]

so question the park brake extends like normal but when i disengage park brake piston doesn't retract and is chewing through pads as still making contact with rotor . any ideas?

[@carlosmontoya1706]

Great explanation Dann. Thank you

[@vwaudiwelder]

Can someone please tell me which wires should be power or ground to retrofit these calipers to another car? Which of the smaller wires are signal/trigger wires to activate the electromagnetic solenoid and clamp the rotor? Thank you

[@hugomartinez8114]

Not an expert but he made it clear to understand.

[@hustlegrowers3134]

My question is can you repair the caliper piston for a vehicle with a caliper like this

[@harishsubramanyam3393]

Excellent Sir! Thank you :)

[@siahmonkey10]

Anyone know what that spindles thread pitch is?

[@BillyRillkratz]

Great, thanks a lot!

[@jackschissler255]

That’s nice. Car companies are always finding a way to screw us in repairs. This stuff isn’t necessary. The basic hand brake and cable system worked wonders. Very cheap to repair. This system is just as stupid as the auto shut off they now have in vehicles that shut off when stopped.

[@izalman]

Electric parking brakes are for weaklings and folk with very poor hand / foot coordination.

[@clivezeederberg2782]

Thanks

[@jafarmahbubnejad8013]

Hello, please help. I want to park on the slope of the 2014 Santa Fe car so that there is no pressure on the gearbox, and when turning on and moving the gear lever with pressure from the outside, I should not thank you. Now, when I stand on the slope, I go to pb, I activate the electric brake, and when I turn on the handle, it comes on by force. I also tried, I waited, I went, then I activated the electric brake, then I turned off the car, only the engine turned off, but the lights behind the amp were on.

[@mariapagan6346]

I need to find the part that goes inside the piston. What is it called?

[@mariapagan6346]

The one that goes in the hole in the back as you stated.

[@mahgol6206]

Hello, please help me. I want to park on the slope of the 2014 Santa Fe car so that there is no pressure on the gearbox and it does not come out of the p when turning on and moving the gear lever with pressure. Thank you. Now when I stand on the slope, I go to p, then I activate the electric brake, when I turn on the gear lever, it comes on by force. I also tried, I stopped, I went, then I activated the electric brake, then I turned off the car, only the engine turned off, but the lights behind the amp were on.

[@25447carepear]

I have a toyota camry le 2012 and EVERYTHING on my car in up to date and in order except, lately when I reverse and put on the brakes, it makes a moaning noise. I've gone to three different toyota dealerships and no one can hear it make the noise when I need to duplicate it. It only happens when I back out and ready to go everyday. If I'm parked anywhere, anytime of day. It makes me nervous because theyve all checked my brakes and have three diagnostic tests. Can you help or give any advice or ideas to what it could be? Thanks

[@rpap5322]

Nothing to worry about mine does the same thing even different model cars.....it is just that the brakes are cold from sitting over night and you are slowly moving backwards..... and the brake pads will make a groaning noise.....once the pads warm up you can back up all day long and they will not groan......

[@RingZero]

The planetary gear system does not reverse itself unless I misunderstood.

[@chrisleon27]

Marvelous

[@viplegaleducation1292]

Why not do a caliper rebuild video?

[@derekwilliams4877]

what is wrong with a hand brake lever & cable.

[@BigEightiesNewWave]

Nothing. This electric thing is a POS.

[@videosenutube]

They were not making any money because of it's good design and functionality.....it never needed maintenance and every body wants a piece of the pie.TPS more garbage we don't need

[@JosephFarrier-c8q]

Buck fudge this hits deep

[@helpontheway]

You’re a god

[@hammadmadi4285]

Sir i m your Student from pakistan ....... Sir i hav question what cause lining on Brake Rotor

[@dw6503]

Good video, but the words(and the dark bakground) are blocking what you're showing!!! I just repaired parking brakes on a vw passat recently and you can actually drive the motor forward or backwards just by changing the polarities of the current from a small 12v dc battery. Just make sure you have a fuse in the circuit to protect the motors from damage. Check the fuse box inside your car to see how much amperage the fuse must have. Mine was 5 amps fuse.

[@vwaudiwelder]

Awesome. Can you please tell me which wires should be power or ground to retrofit these calipers to another car? Which of the smaller wires are signal/trigger wires to activate the electromagnetic solenoid and clamp the rotor? Thank you

[@otahu26]

That is a Pain living here in a RUST Prone Area. Adding more cost over time. What happens when you Loose Power? Or Need that Emergency Brake.

[@jimosullivan1389]

Subbed, liked and just what I needed to know, as i am a nosy bastard (Engineer) ..lol

[@rockyesterline7942]

The guy who invented this electronic emergency brake system should be in prison how many times is this going to go bad and money is going to cost to fix it my 2021 Chevy Silverado has it someday that emergency brake will be stuck on and I will be stranded isn't there any way you can take a fuse out

[@patrickbaitman8336]

Hence cable operated e brake.

[@BourneAccident]

I made the mistake of thinking an electric parking brake functioned like a handbrake. WRONG! I hit the electric brake button going about 35 mph in my 981 Porsche Boxster. It didn't slow the car gradually like my buddy doing it in his new Corvette. It violently made the rear of the car start hopping. The car was bucking all over the place. I barely got my hand on the button to reverse the braking. So, Porsche = no emergency brake... just a parking brake. Nice going Porsche people. I thought removing the dipstick was bad, this brake situation is worse. Also, I put the car on a lift and removed the rear wheels, rotors, etc. to expose the system. No damage and everything was functioning as Porsche intended. So, there wasn't anything wrong with the Porsche as far as I know.

[@be5952]

Very interesting. I don't own a Porsche, but I love hearing stories like yours, because it helps all of us increase our general mechanical knowledge👍.

[@ستيشن]

Thanks alot dear

[@Ltholst7]

This is exactly why I only drive old schools.

[@europana7]

I prefer a $20 cable instead hand brake instead ...

[@powerfullord5029]

Thanks, know i know how it works and why modern cars require just push rear break piston back instead of turning ...

[@peugeotpartnerssss7707]

Peugeot partners Kano Nigeria

[@Quoctienz5678]

👍👍👍👍👍👍

[@vikingsoul8719]

first off that is not how a planetary gear set works it does not self retract if it did it would just keep going in and out. the module reverses polarity on the dc motor that runs it. the torrington bearing or thrust bearing gets lubricated by the brake fluid its submerged in thats why it has no grease.you shouldnt be explaining things you dont know anything about to people these are a very simple and reliable parking brake system way less failure and expense to cable type ebrakes.

[@ericpham7773]

I thought parking brake should be manual no electricity or motor

[@vallabhaipatel9757]

Loved your Effort. its been of great help

[@condor5635]

EPB - dumbest technology. Old manual brake worked fine. Simple and never failed. Yeh replace with motorized ones that engage every time and add hundreds of dollars to a car price. Engineers looking to implement unnecessary technology. A solution looking for a problem. Dumb. Great video however. Thanks for the detailed explanation

[@zchen1994]

So does manual car windows

[@condor5635]

@@zchen1994 - not quite the same comparison. Most people - vast majority - don’t use emergency brake - most everyone uses power windows. Plus you typically don’t use your power windows every day. Imagine your power windows going down when you start the car and going up when you turn off the car. Every day in and out. I don’t use my parking brake. I don’t want it to automatically turn on and off every time I park the car. That’s just additional wear and tear on some thing and I have no desire to replace or to get repaired for some exorbitant amount.

[@Pwilli-hs6yi]

Why, oh why, did ANYONE think replacing a faultless device such as a Hand operated safety device, with a Terminator operated electric device, was a good idea?!?!? It's because electric handbrakes cost more money and no-one can fix them. So you have to go back to the manufacturer and pay millions of pounds/dollars to fix "their inbuilt" fault. Easy money car makers. SHAME ON YOU. There should be a movement against " profiteering by design to a captive market". We all NEED vehicles for work. That is how humans have evolved and expanded. Without vehicles we go back towards cave-man local tribes and exclusivity. So why is the cost of maintenance of vehicles not tightly controlled by Government.???

[@OldSchoolNoe]

Easy fix, consumers need to stop buying technology they don't like.

[@be5952]

@@OldSchoolNoe - Except that when a 'new technology' like this (and many other, equally bad inventions) becomes adopted more commonly, then you can't avoid having it any more. At that point the old, reliable tech / method isn't installed on new cars, so the bad becomes unavoidable.

[@wakefieldyorkshire]

A conversion kit is desperately needed so this junk can be discarded and, a simple efficient tried and tested cable parking brake can be installed.

[@peugeotpartnerssss7707]

Peugeot

[@johnrroberts7900]

Thanks for this. Damn it, so I'm relying on that p*ssy little electric motor with its pathetically fragile drive belt to stop 2 tons of car in an emergency? If even one fails at speed, one wheel locks and the car goes out of control. What fool allowed these to be legal?

[@BigEightiesNewWave]

Exactly , should be banned.

[@williamsimmons152]

Parking brake

[@johnrroberts7900]

@@williamsimmons152 And your emergency brake when the main brakes go out to lunch!

[@williamsimmons152]

@@johnrroberts7900 PARKING BRAKE !!! PARKING BRAKE!!!

[@johnrroberts7900]

@@williamsimmons152 Yes, freno de mano in Spanish, frein à main in French, Feststellbremse in German. Do you carry a ship's anchor for when your main brakes fail?

[@Mike_44]

A drive belt on a brake caliper?!.. Go figure.. Imo these new automotive inventions are totally counterintuitive. Why not leave the calipers being hydraulic as they were and have worked perfectly for so many years. I simply don't get it. Another one is that stupid ESS (engine stop start) system.. Ugh!!

[@OC3707]

This is the singular most stupid thing car makers have ever come up with.

[@johnkenny4017]

Thank you .Why the hell would that complicate such a simple thing I'll tell you why the cell parts and labor .Greed

[@jvmiller1995]

How stupid. Of a design. Why not just put a line lock on a brake line. That is how I park my 53 Chevy 5 window truck. Mine is a manual one. You put your foot on the brake and push it done. then you push in on a mounted button and let off of the brake. It locks the the line going to either the front or back or both if using 2. When you want to release the brake just push the pedal again just a little harder than when yo set and it releases. They work for ever and use zero electronics. Some times simpler is better.

[@Simon-xi8tb]

Wow, lets fucking complicate a simple mechanical solution that worked for decades and put this mechatronicly britle system in our cars just so we can have a fucking button or even better, a fucking glass touchscreen to press.

[@michaelkapp6444]

Talk about over engineering

[@MrFreerideForever]

Great video about an absolutely horrible system. That heap of garbage was conjured by a moron or a profiteer, not someone who knows & cares about what they're doing. VW though, of course. 🙄

[@Ryan-hi6zg]

Yeah ill stick to cars with shoes. I'm all set with this garbage

[@pjimmbojimmbo1990]

Those things will be springing Hydraulic Leaks in short Order, with loss of Rear Brakes. I refuse to use the Parking Brake and have disabled any Hill Assist on my Car, so as to reduce any stress/wear/contamination of the Seals

[@barryk8969]

A park brake that cannot be trusted. At least the lever/cable system wouldn’t fail because of a leaking seal. All seals will eventually leak. Then no park brake.