Brake Pressure Pre-Control for Faster ABS Wheel Lock Prevention
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Solution Overview
Problem
Conventional anti-lock braking systems (ABS) face inefficiencies during rapid braking, as they take time to stabilize and may not optimize deceleration due to the inertia of the vehicle, leading to suboptimal braking performance and increased risk of wheel locking.
Innovation Solution
A method for operating a braking system that uses a form pressure value and a processing rule to set a pre-control value for brake pressure, considering vehicle-specific normal force curves and pitching dynamics, allowing for controlled brake pressure adjustments to prevent wheel locking and optimize deceleration by regulating brake pressure gradients and wheel speed derivatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anti-lock braking systems are used during rapid braking, then the system can prevent wheel locking through intervention, but the system takes time to stabilize and cannot optimize deceleration due to vehicle inertia, leading to suboptimal braking performance
Solution Approach 1:
The system performs preliminary action by setting a pilot control value for brake pressure before the main braking intervention. This pilot control value is calculated based on a processing rule that represents vehicle model-specific temporal normal force curves and pitching dynamics, allowing the system to anticipate and prepare for the optimal braking pressure trajectory, thus reducing stabilization time and optimizing deceleration performance
2Productivity
If brake pressure is increased rapidly to achieve maximum deceleration, then braking efficiency improves, but the risk of wheel locking increases
Solution Approach 1:
The system dynamically changes parameters by continuously adjusting the pilot control value based on real-time feedback from wheel speed sensors and the derivative of wheel speed. The processing rule adapts the brake pressure trajectory according to vehicle-specific parameters including normal force curves and pitching dynamics, allowing optimal deceleration while preventing wheel locking through parameter optimization rather than fixed pressure increases
3Reliability
If the braking system intervenes quickly to prevent wheel locking, then wheel control is maintained, but the system may not optimize deceleration due to vehicle inertia
Solution Approach 1:
The system implements feedback by continuously monitoring wheel speed and its derivative, then using this information to adjust the pilot control value for brake pressure. The processing rule incorporates vehicle model-specific temporal normal force curves and pitching dynamics to optimize the feedback response, allowing the system to maintain vehicle controllability while optimizing deceleration performance through adaptive control
Data Source
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AI summary
The invention relates to a method for operating a braking system (100) of a vehicle (102), which method is characterized in that, by using a preliminary-pressure value (106) representing a preliminary pressure (114) at the braking system (100) and using a processing specification (108) representing braking dynamics of the vehicle (102), a preliminary control value (110) for a brake pressure (112) of the braking system (100) is set.