Bar-handle Vehicle Brake Control for Rear Lift Suppression
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Solution Overview
Problem
Bar-handle vehicles experience rear wheel lift during abrupt braking, which affects running stability, and existing technologies do not adequately suppress this phenomenon.
Innovation Solution
A bar-handle vehicle brake control apparatus that acquires tangential acceleration and controls the front wheel brake to prevent rear lift by adjusting hydraulic pressure and selecting appropriate control strategies based on acceleration measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If front wheel brake pressure is increased to suppress rear lift, then rear lift suppression is improved, but vehicle stability during normal braking deteriorates
Solution Approach 1:
The brake control apparatus dynamically adjusts front wheel brake pressure based on real-time detection of rear lift conditions. When rear lift is detected through acceleration sensing, the system increases front brake pressure specifically to counteract the lift. During normal braking without rear lift, the system maintains standard brake pressure control. This dynamic, conditional adjustment resolves the contradiction by applying pressure increase only when necessary, preserving vehicle stability during normal operation while effectively suppressing rear lift when it occurs.
2Reliability
If ABS pressure reduction control is applied to prevent wheel lock, then wheel lock prevention is improved, but rear lift suppression capability deteriorates
Solution Approach 1:
The system employs feedback control by continuously monitoring acceleration to detect rear lift conditions and adjusting brake pressure accordingly. When rear lift is detected, the control unit prioritizes rear lift suppression by selecting pressure reduction patterns that counteract the lift while still preventing wheel lock. The system evaluates both wheel speed (for ABS control) and acceleration (for rear lift detection), and dynamically selects the appropriate control strategy based on which condition is more critical at any given moment, thus resolving the contradiction between wheel lock prevention and rear lift suppression.
Data Source
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AI summary
One embodiment provides a bar-handle vehicle brake control apparatus. The control apparatus includes an acceleration acquiring part and a control unit. The acceleration acquiring part acquires a tangential acceleration at a point where a straight line which connects a gravity center of a bar-handle vehicle and a front wheel axle intersects a circle which is centered at the front wheel axle. The control unit controls a front wheel brake based on the tangential acceleration.