How does brake by wire work

[jonathan1994]

So is the brake pedal directly tied to the hydraulic brakes and the system uses electronics to hold off hydraulic force during regen
Or
Is the pedal stand alone and all hydraulic and regen braking controlled entirely by the computer.

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[clavicus]

First of all, I got no freakin clue, but I’ll throw in another question: is there also a non-electronic hydraulic brake line to the rear wheels as a safety? But if so how dis that get employed or not relative to your answer to OP’s questions?

 

[huunvubu]

Tech Feature: Ford Hybrid Braking

On a hybrid vehicle, the brake pedal acts as more of human interface to the ABS module for a request for braking. Regenerative braking is the hybrid’s first choice for braking. The ABS module “tells” the PCM or TCM (model year dependent), that a request for brakes have been made and how much braking is desired. The PCM or TCM, then applies regenerative braking, via the traction motor inside the transmission, as needed. More regenerative braking increases the amount of electrical charge generated for the HV battery at the same time it produces more drag to slow the vehicle down. During many light braking events, the rear friction brakes will be lightly applied and the front may not be applied at all until the vehicle is at a stop or near stop. For this reason, it is normal for a hybrid to wear the rear brake pads two and three times faster than the front pads.

Here's How Brake-by-Wire Works, and Why It's Perfectly Safe

Essentially, a brake-by-wire system controls the brakes electronically. A position sensor monitors how far the driver has pushed the brake pedal, which is used to determine the amount of braking force requested. A control then unit determines how much hydraulic pressure is required, and an electric pump is used to actually generate that pressure and stop the car. All of which happens in an instant. In some electric cars, like the e-Tron and Porsche Taycan, the brake hydraulics are only activated after a certain threshold is met—light pressure on the pedal may only trigger electric motor regeneration.

 

[icegradner]

Sounds about right, my current hybrid wore about the original rear pads around 120k miles, still originals on the front at 150k miles.

 

[Egz]

Same, my Fusion Hybrid had about 110k on the original brakes before a deer took it out.

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