Rider-Adjustable ABS Slip Ratio for Controlled Wheel Slide
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Solution Overview
Problem
Conventional anti-lock brake systems (ABS) in vehicles, such as motorcycles, prevent wheel slip during braking, but they interrupt intentional sliding or drifting maneuvers, limiting the rider's control over the vehicle.
Innovation Solution
A device and method that allow a rider to manually adjust the slip ratio threshold of the ABS system using a user interface device, such as a throttle or handlebar, allowing for intentional wheel slip during sliding or drifting maneuvers while maintaining safety during normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the anti-lock brake system maintains a fixed slip ratio threshold to ensure safety during normal braking, then safety and steering control are improved, but the rider cannot perform intentional sliding or drifting maneuvers
Solution Approach 1:
The slip ratio threshold is changed from a fixed value to a dynamically adjustable parameter. The rider can manipulate the user interface device (throttle, handlebar, or dedicated input) to vary the threshold along a range of values, allowing the ABS system to adapt between safety-oriented normal braking and sport-oriented sliding maneuvers based on rider input
Solution Approach 2:
The system changes the critical parameter (slip ratio threshold) from a constant to a variable that can be adjusted within a range. When the rider manipulates the user interface device, the threshold varies along a range of values, enabling the same ABS system to serve both safety-critical normal braking and intentional sliding operations
2Productivity
If the anti-lock brake system automatically reduces braking force when slip ratio exceeds threshold, then wheel slip is prevented and stopping distance is reduced, but intentional sliding maneuvers are interrupted
Solution Approach 1:
The system continuously monitors the slip ratio and compares it against the dynamically adjustable threshold. When the slip ratio exceeds the threshold, the ABS control device reduces braking force; when it falls below, braking force is increased again. This feedback loop now adapts to rider intentions through user interface manipulation, allowing intentional sliding when desired while maintaining automatic control during normal operation
Solution Approach 2:
The braking force control transitions from a static threshold-based system to a dynamic system where the threshold itself can be varied by the rider through the user interface device, enabling the system to switch between automatic slip prevention and intentional slide allowance based on real-time rider input
3Adaptability or versatility
If the slip ratio threshold is increased to allow intentional sliding, then maneuver flexibility is improved, but safety during normal braking operation is compromised
Solution Approach 1:
Rather than permanently increasing the threshold to enable sliding, the system dynamically adjusts the threshold based on rider input through the user interface device. This allows the threshold to be high when sliding is desired and returns to the safety-oriented lower threshold when normal braking is resumed, eliminating the need to compromise normal braking safety
Solution Approach 2:
The user interface device acts as an intermediary between the rider and the ABS control system. By manipulating this interface (throttle position, handlebar angle, or dedicated input), the rider communicates intent to the control device, which then appropriately adjusts the slip ratio threshold without directly compromising the safety parameters of normal braking operation
Data Source
AI summary
A novel wheel slip control device and method improve upon conventional anti-lock brake systems by providing a user interface device which allows the vehicle operator to manipulate the slip ratio threshold of the anti-lock brake system on demand as he or she executes a slide or drift maneuver—thus preventing the system from interrupting the maneuver while also retaining the safety benefits of the anti-lock brake system during ordinary vehicle operation.