BDWBrake Disc Wiping
Lightly applies the pads to remove moisture from brake discs and keep braking response consistent.
Standards
- ISO 26262 development path
- ESC/ABS integration
- Rain/light sensing
- Reuses brake hardware
System overview
Brake Disc Wiping (BDW) is an intelligent maintenance function that automatically clears moisture from brake discs to keep braking optimal in wet conditions. It activates during extended wiper use or via rain/light sensors and wheel-speed data, then periodically applies slight brake pressure (about 5–15 bar) for brief pad-to-disc contact without noticeable deceleration, typically every few minutes in rain. Integrated with the ESC/ABS hydraulic unit and using existing brake components, BDW removes the thin water film on the rotors, reduces corrosion, and preserves the optimal friction coefficient.
Triggered by wiper use, rain/light sensors, and wheel-speed data
Brief pad-to-disc contact without noticeable deceleration
Removes water film and reduces rotor corrosion
Maintains a consistent friction coefficient in the wet
Technical profile
Capabilities and technical values are program-dependent and must be confirmed against the applicable OEM requirements, vehicle architecture and validation plan.
Problems it solves
- Solves delayed brake bite from water film on wet rotors.
- Keeps braking response consistent in prolonged rain.
- Reduces rotor corrosion through regular surface cleaning.
Typical applications
- Vehicles in wet or rainy climates needing consistent braking.
- Platforms with advanced electronic brake systems.
- Programs reusing ESC/ABS hydraulics for maintenance functions.
Technical profile
- Trigger
- Extended wiper use, rain/light sensors, wheel-speed data
- Action
- Periodic light 5–15 bar pad-to-disc contact
- Result
- Removes water film and preserves friction
- Integration
- Runs on the ESC/ABS hydraulic control unit
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