Two-Stage Sway Bar with Selective Engagement for Roll Control
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Solution Overview
Problem
Existing sway bars lack the ability to dynamically adjust their stiffness and anti-roll characteristics in response to varying driving conditions, particularly in off-road environments where reduced stiffness is desired for terrain traversal but increased stiffness is needed for stability during maneuvers.
Innovation Solution
A two-stage sway bar assembly with an outer and inner sway bar, where the outer sway bar can be disengaged from the inner sway bar using a remote activator and actuation fluid, allowing for adjustable stiffness and anti-roll characteristics, enabling the vehicle to adapt to different driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a larger diameter sway bar is used, then vehicle roll reduction is improved, but terrain traversal capability deteriorates
Solution Approach 1:
The sway bar system transitions from a static configuration to a dynamic one by enabling the outer sway bar to be selectively engaged or disengaged. This allows the system to adapt its stiffness characteristics in real-time based on driving conditions, resolving the contradiction between maintaining stability and enabling terrain traversal
Solution Approach 2:
The sway bar is divided into two functional stages: an inner sway bar that provides baseline anti-roll characteristics, and an outer sway bar that can be selectively engaged to enhance stability. This segmentation allows the system to operate in different stiffness modes by engaging or disengaging the outer stage
2Adaptability or versatility
If a smaller diameter sway bar is used, then terrain traversal capability is improved, but vehicle roll reduction deteriorates
Solution Approach 1:
The system dynamically adjusts its stiffness by disengaging the outer sway bar during terrain traversal operations, allowing the inner sway bar to provide minimal resistance while maintaining the ability to recover stability when the outer bar is re-engaged
Solution Approach 2:
The two-stage design with separable inner and outer sway bars enables independent operation of each stage, allowing the system to use only the inner bar for terrain traversal while preserving the outer bar for stability-critical maneuvers
3Adaptability or versatility
If the sway bar stiffness is reduced for off-road operation, then terrain traversal capability is improved, but stability during maneuvers deteriorates
Solution Approach 1:
The system provides dynamic stiffness adjustment by allowing selective engagement of the outer sway bar, enabling the vehicle to switch between compliant off-road mode and stable maneuver mode based on real-time driving conditions
Solution Approach 2:
The separable two-stage design allows the system to operate with only the inner sway bar for off-road terrain traversal, while the outer sway bar remains available to be engaged when stability during maneuvers is required, ensuring reliability across different operating conditions
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 sway bar assembly effectively reduces stiffness for off-road terrain traversal while maintaining stability during other driving conditions by allowing the outer sway bar to be disengaged, providing improved vehicle control and adaptability.
Implementation Method 1
A sway bar can include a biasing element that biases the first coupling toward the second coupling such that the first coupling and the second coupling mate.
Implementation Method 2
The housing is configured to accept an actuation fluid to move the first coupling relative to the second coupling
Data Source
AI summary
Sway bars are described that include at least an inner sway bar, a first outer sway bar, and a second outer sway bar. The sway bar includes a first coupling portion and a second coupling portion that can engage and disengage under control from a remote location. The sway bar includes a larger diameter, outer sway bar assembly that can be disengaged and a smaller diameter inner sway bar. The sway bar can include a housing to retain fluid.