Front-Rear Brake Distribution for Judder-Reduced Vehicle Braking
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Solution Overview
Problem
Heavy-duty vehicle drivers experience discomfort due to brake judder, caused by irregularities in brake drums or discs, which existing technologies fail to address effectively without compromising braking performance.
Innovation Solution
A computer system that determines the oscillation amplitude of a vehicle during braking, compares it with a predefined reference value, and adjusts the brake torque distribution between front and rear axle brakes to minimize judder perception while maintaining desired braking performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brake torque is applied to stop the vehicle, then braking performance is achieved, but driver discomfort occurs due to brake judder
Solution Approach 1:
The system dynamically changes the brake torque distribution parameter between front and rear axles based on detected oscillation amplitude. When judder is detected, the system adjusts the proportion of brake torque applied to each axle, thereby modifying the braking parameters to eliminate vibration while maintaining stopping performance.
Solution Approach 2:
The system continuously monitors oscillation amplitude during braking and uses this feedback to adjust brake torque distribution in real-time. The control system compares detected vibrations against thresholds and automatically modifies brake application, creating a closed-loop feedback mechanism that eliminates judder while preserving braking effectiveness.
2Object-affected harmful factors
If brake torque distribution is adjusted to reduce judder, then driver comfort is improved, but braking performance may be compromised
Solution Approach 1:
The brake torque distribution is made dynamic rather than static. The system continuously adapts the torque distribution ratio between front and rear axles based on real-time oscillation detection, allowing the braking system to respond to changing vibration conditions while maintaining optimal braking performance throughout the deceleration process.
Solution Approach 2:
The system modifies brake torque distribution parameters only when oscillation thresholds are exceeded, otherwise maintaining normal braking operation. This conditional parameter adjustment ensures that braking performance is preserved under normal conditions while comfort is improved when judder occurs.
3Object-affected harmful factors
If oscillation amplitude is monitored and brake distribution is controlled dynamically, then driver comfort is improved, but system complexity increases
Solution Approach 1:
The braking system monitors its own oscillation characteristics and automatically adjusts its torque distribution without external intervention. The system serves itself by detecting its own vibration state and correcting imbalances, eliminating the need for complex external control mechanisms while improving comfort.
Solution Approach 2:
A feedback loop continuously monitors oscillation amplitude and automatically adjusts brake torque distribution. This self-regulating mechanism uses simple threshold-based control to modify braking characteristics, achieving comfort improvement through relatively straightforward feedback control rather than complex predictive algorithms.
Data Source
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AI summary
A computer system comprising processing circuitry configured to: determine, during a braking event of a vehicle, an oscillation amplitude of a currently oscillating part of the vehicle; perform an amplitude comparison by comparing the determined oscillation amplitude with a predefined reference value; receive a brake request value indicative of a desired total brake torque or total brake force; perform a brake request comparison by comparing the received brake request value with a predefined brake request value; and control a brake distribution between front axle brakes and rear axle brakes of the vehicle based on the amplitude comparison and the brake request comparison, wherein said brake distribution is in the form of a brake torque distribution of said desired total brake torque or a brake force distribution of said desired total brake force. There is also disclosed a computerimplemented method.