Mercedes unveils In-Drive Brakes, an EV system integrating brakes into the motor for better efficiency, cleaner streets, and improved aerodynamics.
The system replaces calipers with a circular brake pad on the motor’s output shaft, pressing against a water-cooled ring.There is no traditional caliper; instead, scrubbing speed is generated by pressing the circular brake pad against the stationary disk.The concept, called ‘ In-Drive Brake s’, relocates the braking system from the wheels to the electric drive motor. Positioned where the half-shafts connect, the innovative design integrates the brakes directly into the motor assembly.
While the prototype demonstrates this approach on the rear axle, it has the potential to function on both the front and rear axles. A complete emergency stop may need up to 2200 kW of power, but regenerative braking usually provides up to 290 kW. However, because friction brakes are rarely used, their rotors typically rust, which results in brake dust, noise, and decreased efficiency.
In contrast to traditional disc brakes, the In-Drive Brakes function similarly to a clutch system in manual gearboxes. For EVs, a cleaner, more integrated, and more effective braking solution is provided by a rotating disc that is fixed to the half-shaft.The proposed braking system replaces conventional disc brakes with a design resembling a manual transmission clutch.
Clean Mobility Electric Vehicle EV In-Drive Brake Mercedes Benz Regenerative Braking Sustainability
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