Brake-by-Wire: Purely electric brake system of the future by ZF for software-defined vehicles – ZF

Say goodbye to brake fluid, as ZF Group introduces a purely electrically controlled braking system.

The new system, referred to as ‘dry brake-by-wire’, does not require brake fluid. Instead, brake pressure is generated by electric motors and brake signals from the pedal to the motor are transmitted electrically. This system offers several advantages over conventional braking systems, including shorter braking distances, better recovery of braking energy, and lower maintenance costs. For instance, during automatic emergency braking at a speed of 100 km/h, the braking distance can be up to nine meters shorter than with conventional systems. Furthermore, electric cars can achieve up to 17 percent more range via improved recovery of braking energy.

The dry brake-by-wire system also reduces the residual drag torques that occur with conventional systems due to minimal contact between the brake pads and the brake discs. This results in fewer particulate emissions due to brake abrasion and lower resistance during driving, which can increase range in an electric vehicle.

The absence of a hydraulic system significantly reduces assembly and logistics costs during vehicle production as the system consists of fewer parts, and the user benefits from reduced maintenance costs as brake fluids no longer need to be changed. Despite the lack of a mechanical connection between the brake pedal and the brake actuators, the braking feel is the same as that of a hydraulic brake.

Dr. Holger Klein, CEO of ZF Group said: “Our purely electrically controlled braking system is a significant addition to our portfolio of networked chassis systems. With such by-wire systems, we are opening the door to a new era of vehicle control.”

(Now only if they could replace blinker fluid…)

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