Braking

[Weston]

Evening all.

a daft question here but how does the Taycan braking system work. Is it regen until the point of actually coming to a stop and then the traditional brakes kick in?

The reason for asking is that when I come to a complete stop the brake feel changes and there is a noise as if the traditional brakes a taking over but it’s almost as if the brakes are grinding though so I also assume there would be a low brake wear warning on the dash.

cheers

M

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[Lars]

Evening all.

a daft question here but how does the Taycan braking system work. Is it regen until the point of actually coming to a stop and then the traditional brakes kick in?

The reason for asking is that when I come to a complete stop the brake feel changes and there is a noise as if the traditional brakes a taking over but it’s almost as if the brakes are grinding though so I also assume there would be a low brake wear warning on the dash.

cheers

M

I’ve not noticed any grinding at all (Unless you think the noise of recuperation is grinding). As I understand it, braking is 90% recouperation (which can sound a bit like grinding) But only 10% using brake pads. Except when cold or battery full in which case braking is 100% standard brake pads until pads have cleaned the discs or the battery will accept recuperation Charge.

 

[TXAG]

... a daft question here ...

No question is too daft for this crowd!

I’ve not noticed any grinding at all (Unless you think the noise of recuperation is grinding). As I understand it, braking is 90% recouperation (which can sound a bit like grinding) But only 10% using brake pads. Except when cold or battery full in which case braking is 100% standard brake pads until pads have cleaned the discs or the battery will accept recuperation Charge.

Agreed. The Taycan decides how much braking is recuperation and how much is physical while maintaining (or perhaps with your extraordinary senses, striving to maintain) the same pressure point in the brake pedal. The Porsche Active Stability Management (PASM) and electromechanical brake booster work in combination.

More info can be found in the most recent issue of Christophorus No. 403 - the one with British tennis phenom Emma Raducanu on the cover. The article starts on page 30 and claims that recuperation is responsible for one-third of the range.

 

[Jhenson29]

AFAIK…

The car uses regen as much as possible.

The car blends friction brakes in if the requested braking exceeds what can be done by regen braking. This limit will vary by circumstance and could be very low or zero if the battery of full.

The car uses friction brakes exclusively:

• during the first few hundred miles of new brakes to bed the brakes
• during the first small amount of braking for the first drive after the car has been sitting
• at very low speeds or when stopped

 

[Jhenson29]

As I understand it, braking is 90% recouperation (which can sound a bit like grinding) But only 10% using brake pads.

I think the 90% refers to an estimated average of all braking and not an instantaneous percent.

 

[Fish Fingers]

It's almost certainly not low brake pads unless you have done a very high mileage.

With so much braking done via regen, the discs get very little use.

 

[W1NGE]

I’ve not noticed any grinding at all (Unless you think the noise of recuperation is grinding). As I understand it, braking is 90% recouperation (which can sound a bit like grinding) But only 10% using brake pads. Except when cold or battery full in which case braking is 100% standard brake pads until pads have cleaned the discs or the battery will accept recuperation Charge.

Discs are used from start up for a short distance and then regen braking for the rest of the journey unless you perform an emergency stop where both regen and discs will work together to stop the car.

The grinding could be residue (rust) on the discs if no PCCB or PSCB brakes due to rain / moisture and will clear after a few stops. It could also be due to a warped disc scraping on the brake pads.

If in doubt get it checked by your dealer.

 

[Fish Fingers]

Just thinking out loud.....
Could it also be a trapped stone or something stuck in the brakes?

As they get used so infrequently, I guess this could be around for a while?

 

[TXAG]

Just thinking out loud.....
Could it also be a trapped stone or something stuck in the brakes?

As they get used so infrequently, I guess this could be around for a while?

Good idea. Could be, even if the clearance is small.

OP (@Weston ), look at your discs to see if there's an extra tiny groove or scratch.

Does the noise occur when braking in drive, reverse, or both?

 

[Taycan Jay]

I also have a grinding noise coming from the front left side while braking.

 

[mystermykee]

I also have a grinding noise coming from the front left side while braking.

I have this same problem. Has anyone got this checked out by the dealer and resolved?

 

[mystermykee]

Hi all,

Reviving this thread. My car was in for the uPdate and asked them to check the grinding noise from the front left rotor/brake pad. Well, I've been scheduled to come back for a full front PSCB replacement under warranty (5k miles).

 

[RAHRCR]

Hi all,

Reviving this thread. My car was in for the uPdate and asked them to check the grinding noise from the front left rotor/brake pad. Well, I've been scheduled to come back for a full front PSCB replacement under warranty (5k miles).

Strange outcome. Did they provide details of the defect?

 

[QueenBean]

I wonder how much recuperation (regen) is happening in base (RWD) vs. 4S (or other dual motor AWD)?

It is my understanding that most braking force is done by the front brakes. A RWD Taycan has no front motor, so I wonder if RWD models use more mechanical braking than AWD models?

Maybe f1eng will chime-in on this thread?

 

[W1NGE]

Larger motor is on the rear axle and so (not being an engineer) I'd expect most recuperation to come from that and obviously if you have two motors then more potential to recuperate more energy and of top of that you may squeeze a little more with overrun recuperation.

Most braking is performed by the motor(s) and not the brakes (in emergency stopping scenarios this will change) - typically 97% of all braking is performed this way hence why your pads will last "forever".

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