Motorcycle Integral Brake Selective ABS Control
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Solution Overview
Problem
In motorcycles with integral brakes and anti-lock braking control, the rear wheel can lock or exhibit a locking tendency in various driving situations when the anti-lock braking control is switched off, leading to unstable driving conditions and safety hazards due to additional braking torque from shifting gears or steep hill descents.
Innovation Solution
An integral brake system with selective deactivation of anti-lock control for the front wheel brake, allowing the rear wheel anti-lock control to remain active, preventing unwanted rear wheel locking, and optional complete shutdown of anti-lock braking for both wheels through a switching element or specific actuation of brake actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the anti-lock braking control is switched off for integral brake systems, then the driver can lock the front wheel for off-road and racetrack operation, but the rear wheel may lock unintentionally causing unstable driving conditions
Solution Approach 1:
The patent segments the anti-lock braking control system into independent front and rear wheel controls. The driver can selectively deactivate anti-lock control for the front wheel brake while maintaining it for the rear wheel brake, allowing independent optimization of each wheel's braking behavior for different operating conditions.
Solution Approach 2:
The system applies different control qualities to different parts of the braking system. The front wheel brake can operate without anti-lock control for off-road performance, while the rear wheel brake maintains anti-lock control to prevent unwanted locking and ensure stability, creating localized optimal performance characteristics.
2Ease of operation
If the anti-lock braking control is completely switched off, then the driver has full control over both wheels for racing operations, but safety is reduced due to potential rear wheel locking
Solution Approach 1:
The braking control system is divided into independently controllable front and rear sections. Anti-lock control can be deactivated for the front wheel to maximize driver control and performance, while remaining active for the rear wheel to eliminate safety hazards, achieving both operational freedom and safety.
Solution Approach 2:
The control system acts as an intermediary between complete anti-lock deactivation and full anti-lock activation. By allowing selective deactivation per wheel, it provides an intermediate state that balances driver control requirements with safety considerations.
3Power
If additional braking torque occurs on the rear wheel during gear shifting or hill descent, then braking performance is enhanced, but rear wheel locking occurs causing unstable driving conditions
Solution Approach 1:
The anti-lock braking control system continuously monitors rear wheel braking conditions and provides feedback control. When additional braking torque occurs during gear shifting or hill descent, the system detects the approaching lock-up condition and modulates brake pressure to maintain optimal slip ratio, preserving both braking power and driving stability.
Solution Approach 2:
The anti-lock control system prepares for potential rear wheel locking by continuously monitoring braking conditions and pre-adjusting brake pressure. When conditions indicate impending lock-up during high-torque situations, the system applies counter-action before complete locking occurs, preventing instability while maintaining braking effectiveness.
Data Source
Figure 1
AI summary
The integral brake system (2) for the motorcycle (1) has front (2) and rear (3) wheel brakes as well as a hand-brake lever (4) and a foot-brake lever (5). The hand-brake (4) lever serves to trigger both the front and rear wheel brakes through an integral braking function. The foot-brake lever serves only to trigger the rear-wheel brake. Anti-lock braking is maintained for both wheels if a button (6) that deactivates the front wheel ABS is not pressed and if the rider uses the hand-brake lever. If the rider presses the button (6) and uses the hand brake lever to operate the brakes, the anti-lock functionality for the front wheel is turned off so that the front wheel can be locked if desired, while the ABS is active for the rear wheel to prevent it unintentionally locking. If the rider needs to override the anti-lock braking functionality for the rear wheel the rider can operate the foot-brake lever (5) to lock the rear wheel if desired.