Vehicular Brake Control for Independent Wheel Lock Prevention
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Solution Overview
Problem
Conventional vehicular brake control systems for bar handle type vehicles, such as auto-tricycles and ATVs, lack independent control of front and rear wheels, resulting in inadequate brake feeling and inability to perform sporty driving maneuvers, and stability issues when wheels lock during braking.
Innovation Solution
A brake control apparatus with independent brake operation elements and a control unit that performs anti-lock brake control and differential brake force application between the front and rear wheels based on operational states, allowing independent operation when wheels are not locked and interlocked operation when a wheel is locked to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If brake operations of front and rear wheels are performed in an interlocked manner based on brake operation unit pressure, then vehicle stability is maintained during normal braking, but independent brake control based on driver intention cannot be achieved and good brake feeling cannot be obtained
Solution Approach 1:
The brake control system dynamically switches between independent brake control mode (when no wheel is locked) and interlocked brake control mode (when a wheel is locked). The control unit determines the locked state of each wheel and automatically adjusts the control strategy, allowing the system to adapt its degree of interlocking based on real-time wheel conditions, thus resolving the contradiction between independent control and stability
Solution Approach 2:
The system changes the control parameter from fixed interlocked control to variable control based on wheel locked state detection. When wheel speed sensors detect that a wheel is locked, the control unit changes the brake pressure distribution strategy, applying brake force to the non-locked wheel while releasing or maintaining pressure on the locked wheel, thereby achieving both independent control capability and vehicle stability
2Reliability
If anti-lock brake control is applied to prevent wheel locking, then wheel locking is prevented and brake feeling is improved, but vehicle stability may be compromised without coordinated brake force application to the other wheel
Solution Approach 1:
The control system applies different brake control strategies to different wheels based on their individual locked states. When one wheel is locked, the control unit applies anti-lock brake control specifically to that wheel while simultaneously applying brake force to the non-locked wheel. This localized differentiation allows each wheel to be controlled according to its specific condition, preventing wheel lock while maintaining overall vehicle stability through coordinated brake force distribution
Data Source
AI summary
A control unit 10 controls brake forces of brake systems of a pair of brake operation elements L1, L2 operated independently to perform an anti-lock brake control for eliminating a locked state of a wheel. The control unit 10 applies the brake force to one of the wheel brakes B1, B2 of the brake system which differs from the brake system of the operated brake operation element when the brake operation elements L1, L2 is operated. When one or both of the brake operation elements L1, L2 are operated and so the wheel likely falls in a locked state, the control unit 10 performs an anti-lock brake control on the brake system of the wheel likely falling in the locked state and also performs a brake force application control on the other brake system which is different from the brake system of the wheel likely falling in the locked state.