Brembo brakes on Cybertruck?

[Jhodgesatmb]

I went to the Petersen Automobile Museum yesterday to see the Cybertruck in person. With everyone saying it is a monster I wanted to know what I signed up for (I am 5’7”). I found it to be normal for a full-sized pickup in length and height and quite wide. Definitely doable.

While at the exhibit there was a section of Model S Plaid that had Brembo brake calipers and I was reminded of a recent video put out by @connectingodots that suggested the CT might use the Brembo digital brake system to eliminate hydraulics (and use the steer by wire system to eliminate manual linkages there). These 2 ideas would dramatically simplify CT design and manufacturing, and improve performance - very Elon.

Does anyone know if this is more than a fantasy? Even if we could see the brake calipers on the prototype they would probably be different than the production truck. Ideas?

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[Ogre]

Does anyone know if this is more than a fantasy? Even if we could see the brake calipers on the prototype they would probably be different than the production truck. Ideas?

Nope.

Likely only way we’ll know for sure is if Brembo leaks something. I think it’s a solid 60/40 chance in favor. Fly by wire definitely seems like the way to go in terms of weight, reliability, and safety though. Very much in line with Tesla’s goals for the truck.

 

[HaulingAss]

I went to the Petersen Automobile Museum yesterday to see the Cybertruck in person. With everyone saying it is a monster I wanted to know what I signed up for (I am 5’7”). I found it to be normal for a full-sized pickup in length and height and quite wide. Definitely doable.

Cool, I'm 6'-04". Do you think it will be big enough?

Ha! Just kidding, Elon said it would have plenty of room to accommodate Igor the giant!

While at the exhibit there was a section of Model S Plaid that had Brembo brake calipers and I was reminded of a recent video put out by @connectingodots that suggested the CT might use the Brembo digital brake system to eliminate hydraulics (and use the steer by wire system to eliminate manual linkages there). These 2 ideas would dramatically simplify CT design and manufacturing, and improve performance - very Elon.

Does anyone know if this is more than a fantasy? Even if we could see the brake calipers on the prototype they would probably be different than the production truck. Ideas?

Based upon what I've seen and heard, including Brembo using a Model 3 to develop their new Sensify digital braking system, I would be surprised if Cybertruck doesn't come equipped with the latest and greatest braking system from the greatest brake manufacturer ever.

And with a 3500 lb. payload capacity, you can bet this will be a brake system with robust discs and calipers that can handle a certain amount of repeated higher speed stops without a heavy load. Fully loaded it will be good for one high speed stop before it needs to cool off a bit. but I'm most excited about getting rid of hydraulic fluid and brake bleeds, boiling brake fluid and the extra anti-lock performance a digital system will allow. No more pulsing brake pedal and crude low-frequency scuffing under heavy anti-lock braking! Sensify should allow very sensitive heavy braking at the threshold of wheel lockup which will bring the vehicle to a stop in a shorter distance than traditional anti-lock systems can muster.

Steer by wire is also probably in the cards. Elon said the Cybertruck will be a technological powerhouse and he has a long history of releasing new models that exceed expectations.

 

[Ogre]

I'm most excited about getting rid of hydraulic fluid and brake bleeds, boiling brake fluid and the extra anti-lock performance a digital system will allow.

I made the mistake of taking my RV over a shorter but much steeper pass going into Kernville one time and not only did I boil my brakes to the point where my foot was literally on the floor with no slowing at all, I almost hit a cow. Wound up going down that very steep slope in 1st and 2nd gear the whole way, probably not great on the transmission, but may have saved our lives. I had to pump the brakes like 3-4 times to get any significant braking power at one point.

But… regenerative braking should deal with this almost entirely. Brakes boil mostly because they are the only way to control your speed on steep descents. Pretty sure we’ll be able to roll down some pretty steep ass hills and rely 100% on regen to control speed. Brake pads will be for actual stopping or maybe slowing for tight corners. Just don’t ever top off the battery at the top of a mountain.

All that said, it would be be a huge relief knowing that regardless of what condition regenerative braking is in we’ll have the safest brakes on the planet.

 

[Crissa]

Just downshift, ya wingnut. (Thanks to the tappet brothers.)

But yes, regen can cover alot of sins.

-Crissa

 

[HaulingAss]

I made the mistake of taking my RV over a shorter but much steeper pass going into Kernville one time and not only did I boil my brakes to the point where my foot was literally on the floor with no slowing at all, I almost hit a cow. Wound up going down that very steep slope in 1st and 2nd gear the whole way, probably not great on the transmission, but may have saved our lives. I had to pump the brakes like 3-4 times to get any significant braking power at one point.

But… regenerative braking should deal with this almost entirely. Brakes boil mostly because they are the only way to control your speed on steep descents. Pretty sure we’ll be able to roll down some pretty steep ass hills and rely 100% on regen to control speed. Brake pads will be for actual stopping or maybe slowing for tight corners. Just don’t ever top off the battery at the top of a mountain.

All that said, it would be be a huge relief knowing that regardless of what condition regenerative braking is in we’ll have the safest brakes on the planet.

Just FYI, your RV brakes would likely have been fine if they had been regularly flushed. Moisture in the fluid causes boiling to happen over a hundred degrees sooner than fluid without absorbed moisture.

Current brake systems are plenty reliable when properly designed and maintained, I'm just looking forward the lack of maintenance and better performance and the ability to drive it hard (like on a track) with higher temperature limitations. Hopefully, electric brakes will match the reliability of hydraulic. I think they will because there will probably be four independent systems with electric brakes while hydraulic traditionally only have two independent systems.

 

[Ogre]

Just downshift, ya wingnut. (Thanks to the tappet brothers.)

But yes, regen can cover alot of sins.

-Crissa

Literally what I said.

 

[Ogre]

Just FYI, your RV brakes would likely have been fine if they had been regularly flushed. Moisture in the fluid causes boiling to happen over a hundred degrees sooner than fluid without absorbed moisture.

This was a 1994 Bounder… not what I could call “modern”. But the point about regular maintenance is well taken. When it comes to cars I tend to got by the book or when I noticed something broken. If the 15k checkup doesn’t say flush the brakes, I wouldn’t have even though it might have been 3 years to put that many miles on the RV.

But more important, the braking system on that RV was never designed for grades that steep! Average grade along that stretch was 7%, but there were stretches where I think it was over 10% for a mile at a time.

Current brake systems are plenty reliable when properly designed and maintained, I'm just looking forward the lack of maintenance and better performance and the ability to drive it hard (like on a track) with higher temperature limitations. Hopefully, electric brakes will match the reliability of hydraulic. I think they will because there will probably be four independent systems with electric brakes while hydraulic traditionally only have two independent systems.

Yeah, if you are pushing the system, things get weird a lot faster.

Definitely want them if at all possible.

 

[Mrp911]

I went to the Petersen Automobile Museum yesterday to see the Cybertruck in person. With everyone saying it is a monster I wanted to know what I signed up for (I am 5’7”). I found it to be normal for a full-sized pickup in length and height and quite wide. Definitely doable.

While at the exhibit there was a section of Model S Plaid that had Brembo brake calipers and I was reminded of a recent video put out by @connectingodots that suggested the CT might use the Brembo digital brake system to eliminate hydraulics (and use the steer by wire system to eliminate manual linkages there). These 2 ideas would dramatically simplify CT design and manufacturing, and improve performance - very Elon.

Does anyone know if this is more than a fantasy? Even if we could see the brake calipers on the prototype they would probably be different than the production truck. Ideas?

Like when Elon talked about starship and how they were taking out the hydraulic raptor motor control system and replacing it with electrical (screw drive) system. Hydraulic has an electric system to pressure the hydraulic system which drives the cylinders which drive the motor. Replaced by a motor system which moves the motors. Less is usually more. The rate of change driven by Tesla and SpaceX engineers is accelerated vs most others competing. Fun to see.

 

[CyberGus]

With digital calipers, the computer could precisely control the torque to each wheel even without 4 independent motors. Sexy.

 

[Ogre]

Like when Elon talked about starship and how they were taking out the hydraulic raptor motor control system and replacing it with electrical (screw drive) system. Hydraulic has an electric system to pressure the hydraulic system which drives the cylinders which drive the motor. Replaced by a motor system which moves the motors. Less is usually more. The rate of change driven by Tesla and SpaceX engineers is accelerated vs most others competing. Fun to see.

Rocket motors are crazy complicated, likely going electric vastly simplified startup and bought them some power. The hydraulic system is powered by flow of fuels and oxygen which needs a crazy bootstrap startup. Electric is maybe more weight due to batteries but likely let’s them cut some other systems and that extra flow should provide a bit more thrust.

(You maybe know this, just needing out a bit)

 

[Crissa]

With digital calipers, the computer could precisely control the torque to each wheel even without 4 independent motors. Sexy.

That's how anti-lock brakes already can work?

-Crissa

 

[Ogre]

That's how anti-lock brakes already can work?

-Crissa

I’m pretty sure current anti lock brakes control all 4 wheels at the same time.

 

[Crissa]

I’m pretty sure current anti lock brakes control all 4 wheels at the same time.

Cornering control wouldn't work without it.

-Crissa

 

[CyberGus]

Emphasis on the precision part.

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