Motorcycle ABS Control for Braking Drifts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motorcycle ABS systems do not effectively enable braking drifts with a locking rear wheel, especially in tight bends, as they maintain continuous control of both wheels during braking, which can limit performance in sports riding.
Innovation Solution
A method and device that deactivates the ABS function for the rear wheel based on speed, comparing the motorcycle's speed to a predefined threshold, allowing a gradual deactivation of the ABS when the foot brake is applied at lower speeds, ensuring safe braking drifts by maintaining the ABS on the handbrake and allowing user-adjustable speed thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ABS function is continuously activated on the rear wheel during braking, then wheel lock-up is prevented and safety is improved, but the ability to perform braking drifts with a locked rear wheel is lost
Solution Approach 1:
The ABS function is made dynamically controllable through rider input detection. When the rider pulls the clutch lever or shifts the gear lever, the system interprets this as a drift intention signal and temporarily deactivates ABS on the rear wheel, allowing controlled lock-up. This dynamic response enables the system to adapt between safety mode and drift mode based on real-time rider actions.
Solution Approach 2:
The system changes the operational parameter of the ABS function from always-active to conditionally-active. By detecting specific rider inputs (clutch lever pull, gear lever shift), the system modifies the ABS activation state, allowing the rear wheel to lock up temporarily for drifts while maintaining safety through controlled deactivation rather than complete system shutdown.
2Adaptability or versatility
If the ABS function is completely deactivated to enable braking drifts, then drift performance is improved, but safety is compromised
Solution Approach 1:
The ABS system is segmented into controllable zones through rider input detection. Instead of complete deactivation, the system selectively modulates ABS based on detected intentions - maintaining ABS during normal braking while allowing temporary deactivation during drift initiation. This segmentation enables simultaneous safety maintenance and drift capability through zone-based control differentiation.
Solution Approach 2:
The ABS function operates in periodic cycles of activation and deactivation based on drift phases. During drift initiation, ABS is deactivated to allow wheel lock-up, then reactivated when the drift phase completes or safety thresholds are approached. This periodic modulation enables controlled drift performance while maintaining safety through rhythmic system engagement and disengagement.
3Adaptability or versatility
If the ABS is switched off abruptly to enable drifts, then drift response is improved, but safety is reduced due to sudden loss of control
Solution Approach 1:
The system performs preliminary detection of rider drift intention through clutch lever and gear lever position sensing before actual drift execution. This preliminary detection allows the system to prepare for controlled ABS deactivation, ensuring smooth transition into drift mode rather than abrupt switching. The preliminary action phase maintains safety awareness while preparing the system for drift performance.
Solution Approach 2:
The ABS deactivation is implemented dynamically rather than as a binary switch. The system continuously monitors rider inputs and adjusts ABS activation levels accordingly, creating a smooth transition from full ABS engagement to partial or complete deactivation. This dynamic modulation improves drift response while maintaining safety through gradual system adaptation rather than sudden changes.
Data Source
Figure 1
AI summary
Disclosed are a method and a corresponding device for controlling an ABS function (ABS) of a motorcycle having a foot brake (FB). For this purpose it is determined whether the foot brake (FB) is applied. Furthermore, a speed value (GW) is provided, which is representative of a speed of the motor cycle. The speed value (GW) is compared with a defined speed threshold value (GSW). If the speed value (GW) represents a speed lower than the speed threshold value (GSW ) and if it has been detected that the foot brake (FB) is being applied, the ABS function (ABS) is deactivated for the rear wheel of the motor cycle.