Speed-Dependent Trailer Oscillation Stabilization
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Solution Overview
Problem
Existing methods for stabilizing a wobbling trailer towed by a vehicle do not adequately account for speed-dependent oscillations, leading to potential re-stabilization issues and driver confusion due to inconsistent braking.
Innovation Solution
A method and apparatus that automatically brake a tandem vehicle-trailer combination based on speed-dependent oscillation amplitudes, decelerating more at higher speeds and triggering braking at lower amplitude thresholds to prevent immediate re-wobbling, using a detection device and brake control unit to manage deceleration and ensure stable trailer operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tandem is braked automatically when oscillation amplitude exceeds a predetermined value, then the trailer oscillation is stabilized, but the driver may experience confusion due to inconsistent braking behavior at different speeds
Solution Approach 1:
The patent applies dynamics by making the braking threshold and deceleration magnitude speed-dependent. At higher speeds, the system uses higher amplitude thresholds and stronger deceleration, while at lower speeds it uses lower thresholds and gentler braking. This dynamic adaptation to operating conditions resolves the contradiction by making the braking behavior consistent with driver expectations at each speed level, reducing confusion while maintaining reliable oscillation stabilization.
Solution Approach 2:
The system changes the parameter of braking threshold amplitude based on the current driving speed. The control unit adjusts the predetermined amplitude value dynamically - using higher thresholds at high speeds and lower thresholds at low speeds. This parameter change ensures that braking interventions are perceived consistently by the driver across different speed ranges, eliminating confusion while maintaining effective oscillation control.
2Reliability
If the tandem is decelerated to reduce oscillation amplitude, then the trailer running is stabilized, but immediate re-wobbling may occur without speed-dependent adjustment
Solution Approach 1:
The patent applies dynamics by implementing speed-dependent deceleration magnitude. At higher speeds, the system applies stronger deceleration to rapidly reduce oscillation amplitude, while at lower speeds it applies gentler deceleration. This dynamic approach ensures that the tandem is decelerated to a speed appropriate for the current operating conditions, preventing immediate re-wobbling by maintaining stable operating parameters after braking intervention.
Solution Approach 2:
The control unit continuously monitors the oscillation amplitude and driving speed, using this feedback to determine both when to apply brakes and how strongly to decelerate. The system adjusts the deceleration magnitude based on the relationship between current speed and oscillation amplitude, ensuring that the tandem reaches a stable operating speed that prevents immediate re-wobbling while adapting to real-time conditions.
3Device complexity
If uniform braking is applied regardless of speed, then the braking system is simple to control, but the stabilization effectiveness varies at different speeds
Solution Approach 1:
The patent implements dynamic brake control where the control unit automatically adjusts both the braking threshold and deceleration magnitude based on detected driving speed. This dynamic control maintains high stabilization effectiveness across all speed ranges without requiring complex manual adjustment by the driver. The system seamlessly adapts braking parameters to current conditions, achieving reliable stabilization while keeping the control interface simple for the driver.
Solution Approach 2:
The braking system performs self-service by automatically selecting appropriate braking parameters based on the detected driving speed and oscillation characteristics. The control unit independently determines the optimal amplitude threshold and deceleration magnitude without driver intervention, adjusting these parameters in real-time to maintain effective stabilization across varying speed conditions while keeping the driver's task simple.
Data Source
AI summary
In a method and apparatus for stabilizing running of a wobbling trailer towed by a vehicle, a tandem of trailer and vehicle is braked by a brake device activated by a control device. The braking process is triggered, when an amplitude of the oscillation of the trailer exceeds a predetermined value. As a result, the tandem is decelerated to a speed at which the amplitude of the oscillation of the trailer falls below a predetermined value. The tandem is decelerated more intensely in the case of a wobbling trailer and when travelling at a first travelling speed than in the case of a wobbling trailer and when travelling at a second travelling speed which is lower than the first travelling speed, and the tandem is braked in presence of the first driving speed during exceeding a lower value of the amplitude than in the presence of the second driving speed.