Brakes

[wax87]

As I was driving in today I was thinking "are the brakes the same on Eco and Hybrids"? If they are the same, it would be interesting to do a heat test between the two. In other words in Max braking and in minimal braking how much more heat is produced from the Eco brakes?

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[JimKivi]

Consider picking a year and the do a part # lookup, switching models from eco to hybrid.

 

[Redline]

I don't know the answer to that, but I do know the Tremor brakes are the best brakes I've ever had on a vehicle. This thing stops rapidly and with excellent control. You're welcome bird I almost ran over the other day.

 

[Nesser]

It appears to be the same brake mechanical components. At least for the wear parts.
The difference is how it is controlled.

Hybrids should not be hydraulically connected - I doubt the ecoboost is either. They should be brake by wire to allow the regen to take the initial braking load and charge up the battery. Here is my best guess:

• At min braking (stop and go) the hybrid should have zero heat generated at the friction pads, all braking done by regen in the transmission until almost a full stop. There is some heat from free wheeling/drag... yes.
• At max braking the systems should have the same friction potential - assuming mechanically equivalent friction systems - with the hybrid possibly winning on maximum stopping force (friction + regen (engine + generator)) I would expect the heat curve for the brake pads and rotors during the emergency stop would look different as the transmission regen will take some energy away from the friction pads.
  • I think the electric generator (magnetic resistance drive gear in a planetary gear set - aka no shifting) can take energy faster and smoother than an engine braking situation - ride with someone learning how to run a manual transmission to feel the shock loads of engine speeds outside the selected gear.
• If the computer ignores regen on emergency braking then the mechanical heat curve should look similar. Would come down to which vehicle is heavier.

 

[colinl]

Hybrids should not be hydraulically connected - I doubt the ecoboost is either.

hybrid and ecoboost mavericks both have very traditional hydraulic brake calipers with 4 channel ABS. such a brake system uses a hydraulic master cylinder, but they differ in how they are engaged.

hybrid and ecoboost mavericks with adaptive cruise control use an electric brake booster. ecoboost mavericks without ACC have a vacuum assisted brake booster.

regeneration in a hybrid is done through the ecvt, not the brake calipers. the system tries to slow the vehicle through the front wheels which spins the electric motors and generates electricity that is fed into the high voltage battery.

 

[inline_five]

My wife's 3rd gen Prius (2010) uses traditional hydraulic braking pressure for fronts, and electronic brake boosted for rears.

It looks like over time manufacturers have become more comfortable with going with fully electronic boosted brakes like the hybrid Maverick has.

What's nice is you can use Forscan to bleed the brakes via the ABS pump on all four corners now.

Also of note, the Maverick uses DOT 4 brake fluid, which is quite a bit thinner then the standard DOT 3 stuff most of us are used to. Unfortunately, it also absorbs water faster, which is probably why Ford specs the 3-year time period for brake flushes.

 

[Redline]

Also of note, the Maverick uses DOT 4 brake fluid, which is quite a bit thinner then the standard DOT 3 stuff most of us are used to. Unfortunately, it also absorbs water faster, which is probably why Ford specs the 3-year time period for brake flushes.

Wait. What? We're supposed to change the brake fluid every 3 years? I don't think I've ever done that on any vehicle I've ever owned.

 

[JMJB]

Maybe this is the thread to ask :
Have any hybrid owners changed brake pads yet , and at what mileage ?

 

[inline_five]

Wait. What? We're supposed to change the brake fluid every 3 years? I don't think I've ever done that on any vehicle I've ever owned.

Why I would heed what Ford recommends...Priuses have issues with brake actuators failing and I'm of the mind old, water-laden brake fluid is partially responsible. It may not be, but it certainly can't help.

With how easy the Maverick is to bleed using the ABS motor, I plan to do it once every three years at least until my 10 year warranty runs out. After that, who knows.

The replacement of the ABS actuator on other 2.5l Ford hybrids can get pricey - in the thousands of dollars. Like $4000.

Here's a used one, and includes both components. List on both looks like is around $2,000:

2024 FORD MAVERICK POWER BRAKE BOOSTER W/ MASTER CYLINDER ABS PUMP 1K MILES | eBay

It's not a simple swap as they have to be reprogrammed for your specific vehicle. No idea how that is done, but guessing dealer only.

Maybe this is the thread to ask :
Have any hybrid owners changed brake pads yet , and at what mileage ?

Haven't changed but I noticed my rears are getting use more than the fronts, which is weird. Others have also posted the same.

 

[Nesser]

hybrid and ecoboost mavericks both have very traditional hydraulic brake calipers with 4 channel ABS. such a brake system uses a hydraulic master cylinder, but they differ in how they are engaged.

hybrid and ecoboost mavericks with adaptive cruise control use an electric brake booster. ecoboost mavericks without ACC have a vacuum assisted brake booster.

Interesting that ecoboosts and hybrids have different brake control systems. Must be significant cost differences to add that complication to the assembly line.

I mistyped. I realize the brakes are hydraulicly connected. They must be computer controlled (control by wire, actuated by the brake booster) in order to allow for regen. I request x ammount of deceleration and the computer decides how to provide that between regen and hydraulics.

I was unaware of a backup safety path being directly connected to the brake pedal and the ability of these systems to adjust the brake feel. Enjoyed the EE video about these hybrid systems.

 

[colinl]

Must be significant cost differences to add that complication to the assembly line.

I'm not sure how significant, but I would certainly agree it's because of cost. I'm also not sure if they're still this way, but in 2021 the Bronco 6th gen used vacuum assist on 4 cylinder models and electric brake boost on 6 cylinder models which I'm fairly confident was also a cost cutting measure.

 

[Bob The Builder]

My XLT has great brakes albeit a bit touchy.

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