As more vehicles adopt brake-by-wire technology, a new backup braking concept could help drivers stop their cars if the primary electronic controls fail. The proposed system is designed to provide an alternative way to slow down or stop a vehicle when its regular braking electronics become unavailable.
How the Backup Braking System Would Work
Brake-by-wire technology replaces traditional mechanical connections between the brake pedal and braking system with electronic controls, sensors and computers. Instead of a direct physical link, the vehicle interprets the driver’s pedal input and electronically determines how much braking force to apply.
The proposed backup system uses three separate control units. The first two manage normal braking operations, while the third continuously monitors them for potential malfunctions.
If the monitoring unit detects a failure in either of the primary control units, it could activate an emergency braking function. The system could also alert the driver through visual, audible or haptic warnings.
Emergency Braking Through a Touchscreen or Steering Wheel
One of the concept’s more unusual features is its proposed alternative braking interface. Instead of relying solely on the conventional brake pedal, drivers could request emergency braking through a button displayed on the vehicle’s infotainment touchscreen.
Another proposed option would place the emergency control directly on the steering wheel, making it easier for drivers to reach without removing their hands from the wheel.
The system could also allow drivers to adjust braking intensity through their interaction with the button. Holding it down could apply more braking force, while a brief tap could request less. The concept could allow drivers to bring the vehicle to a gradual stop rather than applying maximum braking immediately.
The proposal differs from conventional automatic emergency braking systems, which generally intervene to avoid or reduce the severity of a collision. Instead, it focuses on giving drivers another way to brake when the vehicle’s regular electronic controls are unavailable.
Could the Backup Brake Reach Production Cars?
As automakers increasingly adopt brake-by-wire technology, an independent backup control system could provide an additional safety measure in the event of an electronic failure.
However, the proposed interface raises practical questions. Finding and activating a virtual brake button on a touchscreen during an emergency could be difficult, while a steering-wheel control may be easier to reach. Both options would differ significantly from the familiar action of pressing a conventional brake pedal.
For now, the backup braking system remains a patent proposal. There is no guarantee that the technology will be developed for production vehicles or appear in future cars.
