Electric Trailer Brake Control for Death Wobble Suppression
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Solution Overview
Problem
Existing trailer braking systems fail to effectively prevent 'Death Wobble', a high-frequency yawing motion that can lead to loss of control and overturning, especially during high-speed driving, as they rely on weight ratio designs that may change during production and use, and cannot completely eliminate yawing motions.
Innovation Solution
A trailer braking control method and system using an electric brake controller that acquires lateral displacement and speed data to determine if 'Death Wobble' is occurring, adjusts the braking voltage based on the severity and driving state, and considers trailer weight to apply the appropriate braking force, thereby preventing overturning accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If weight ratio design is used to prevent Death Wobble, then the probability of yawing motion is reduced, but the yawing motion cannot be completely eliminated and the front-rear weight ratio may change during production and use
Solution Approach 1:
The patent implements dynamic braking control that automatically adjusts braking force based on real-time detection of trailer lateral acceleration and yaw rate. The controller continuously monitors trailer stability parameters and modulates brake application accordingly, transitioning from static weight-based design to dynamic active control that adapts to changing conditions during operation
Solution Approach 2:
The system employs feedback control by using sensors to detect trailer lateral acceleration and yaw rate, then feeding this information back to the brake controller which adjusts braking force in real-time. This closed-loop control ensures the trailer maintains stability despite weight changes or varying operating conditions
2Force
If electromagnetic coil voltage is increased to increase braking force, then braking effectiveness is improved, but energy consumption increases and braking force becomes unstable when voltage constantly changes
Solution Approach 1:
The patent implements periodic or pulsed braking action rather than continuous high-voltage application. The controller applies brake force in controlled pulses or cycles, maintaining stability correction effectiveness while reducing overall energy consumption compared to sustained high-voltage braking
Solution Approach 2:
The system applies partial braking force rather than maximum braking force continuously. By using moderate braking intensity combined with precise timing and modulation, the system achieves effective stability control without the excessive energy consumption that would result from constant maximum voltage application
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively identifies and prevents 'Death Wobble' by dynamically adjusting the braking voltage, ensuring personal safety and vehicle integrity by avoiding overturning accidents without relying on static weight ratio designs.
Implementation Method 1
A vehicle with the electric brake system is braked by pushing a brake pad by a suction force of an electromagnetic coil
Data Source
AI summary
The present disclosure discloses a trailer braking control method and system based on an electric brake controller. A lateral displacement and speed of a vehicle are acquired first; whether the vehicle has Death Wobble and a degree of the Death Wobble are then determined according to the lateral displacement; if there is Death Wobble, a driving state of the vehicle is determined according to the speed; and finally, a set voltage is added based on a set output voltage according to the degree of the Death Wobble and the driving state, so as to brake the vehicle. The present disclosure avoids setting of a weight ratio in the prior art to prevent the phenomenon of Death Wobble, and can identify and prevent the phenomenon of Death Wobble of a trailer, thereby avoiding an overturning accident and ensuring the personal safety and the integrity of a vehicle.