- Mercedes has developed a brand new in-drive braking system touted as having a number of vital benefits.
- It’s “just about maintenance-free,” traps brake mud, is best for the atmosphere and guarantees to get rid of brake fade.
- The system is at the moment being examined with no clear time-frame for a manufacturing utility.
The overwhelming majority of automobiles have outboard brakes which are related to their wheel hubs, and solely a handful include inboard brakes. Mercedes has taken issues one step additional and put the brakes contained in the housing of an electrical automobile’s drive unit, and it’s touting a number of benefits, together with by no means having to service the brakes for the lifetime of the automotive.
Electrical autos can use their motors to decelerate, not solely saving their friction brakes from put on but additionally placing electrical energy into their battery pack. Varied firms have proposed various kinds of brakes for EVs, from Continental’s ultra-think mountain bike-like disks to the drum brakes that Volkswagen equips all autos constructed on its MEB platform, like the ID.4 or Audi This autumn E-Tron.
VW argues that even in its EVs with over 300 horsepower, drum brakes are enough for the rear. A lot of the braking is completed by the entrance brakes anyway, so going again to this older type of brakes (which is cheaper than disk brakes) is a method VW has tailored its autos for electrical propulsion.
Mercedes has now taken this one step additional with its in-drive brakes. Nevertheless, it hasn’t merely taken a standard disk or drum brake setup and put it contained in the drive unit. It utterly reimagined braking, and within the model of the system they confirmed us in Stuttgart final week, the disk is water-cooled and it doesn’t spin, and the brake pad is round and it spins with the motor.
There isn’t any conventional caliper both and scrubbing velocity is achieved by pushing the round brake pad onto the stationary disk. Mercedes says this method shouldn’t require service for the lifetime of the automobile and all of the brake mud it generates is saved contained in the system in a compartment that doesn’t must be emptied.
The upcoming Euro 7 (EU7) emissions commonplace doesn’t simply take a look at tailpipe emissions. It additionally takes tire and brake particulate emissions from autos under consideration, so holding brake mud from going into the atmosphere will turn into extra of a speaking level in Europe as soon as EU7 comes into power in 2026.
This looks as if an enormous departure even from the inboard brakes that we already know. Mercedes argues there are many benefits except for the system being “just about maintenance-free.” For the reason that disk is water-cooled, brake fade below heavy use shouldn’t be a problem. It additionally reduces unsprung weight, which improves dealing with.
One other benefit touted by the producer is with the ability to equip autos with utterly lined, aerodynamic wheels that can assist decrease autos’ drag coefficient. The system would additionally cut back braking noise, and homeowners wouldn’t be met with rust-covered brake disks after not driving their automobiles for a couple of days.
We didn’t assume this was such an enormous challenge, however Mercedes informed us this particularly was one thing it received many complaints about. The Mercedes engineer who defined how this new braking system works mentioned eradicating the caliper from the wheel will give designers much more freedom to create unique-looking wheels, however it is going to be onerous to persuade automotive fans that this is a bonus.
