Adjustable Stabilizer Bar Structure for Vehicle Roll Stiffness
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Solution Overview
Problem
Existing vehicle suspension systems with solid shaft-type stabilizer bars lack sufficient torsional elastic force to ensure turning stability under various conditions, leading to increased costs with the development of active roll control devices that require numerous components.
Innovation Solution
A stabilizer bar unit with a main rigid member and a sub-rigid member, where the sub-rigid member includes a fixing part, a lever part, and a blade part inserted into a slot hole of the main rigid member, allowing for adjustable roll stiffness based on driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid shaft-type stabilizer bar with constant stiffness is used, then the structure is simple, but the torsional elastic force is insufficient to ensure turning stability under various conditions
Solution Approach 1:
The stabilizer bar transitions from a static constant-stiffness design to a dynamic adjustable-stiffness design. The sub-rigid member can be positioned at different locations along the slot hole in the main rigid member, allowing the roll stiffness to be adjusted according to driving conditions such as vehicle speed, steering angle, or load, thereby ensuring optimal turning stability under various conditions.
Solution Approach 2:
The invention changes the physical parameter of roll stiffness from a fixed value to an adjustable value. By modifying the position of the sub-rigid member relative to the main rigid member through the slot hole mechanism, the effective length and thus the torsional stiffness of the stabilizer bar can be varied, enabling the system to adapt to different driving scenarios.
2Reliability
If an active roll control device with multiple components is implemented, then the roll behavior can be actively controlled, but the manufacturing cost increases excessively
Solution Approach 1:
The stabilizer bar is divided into two functional segments: the main rigid member that provides the primary structural support and connects to the suspension arms, and the sub-rigid member that acts as an adjustable stiffness element. This segmentation allows the system to achieve active roll control through a simple mechanical adjustment mechanism rather than requiring complex active control systems with multiple components, thereby reducing manufacturing costs while maintaining roll control capability.
Solution Approach 2:
The slot hole acts as an intermediary mechanism between the main rigid member and the sub-rigid member. This simple geometric feature enables the sub-rigid member to be repositioned along the length of the main rigid member, providing a low-cost method to adjust roll stiffness without requiring actuators, sensors, or complex control systems. The slot hole mechanism serves as a passive yet effective mediator that achieves active control functionality at minimal cost.
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 stabilizer bar unit effectively controls vehicle roll behavior by adjusting roll stiffness with a simple configuration, reducing manufacturing costs and providing improved turning stability and ride comfort.
Implementation Method 1
the stabilizer bar is twisted and performs an anti-roll function of suppressing a roll motion of the vehicle body with torsional elastic force
Implementation Method 2
damping members respectively arranged on both inner wall surfaces of the slot hole in the longitudinal direction, with the blade part interposed therebetween
Data Source
AI summary
A stabilizer bar device includes a main rigid member connected to suspension arms via links respectively coupled to both end portions, the main rigid member having a slot hole disposed along a longitudinal direction in a preset slot section, and a sub-rigid member having a first end coupled to the main rigid member and a second end inserted into the slot hole.