Variable-Stiffness Stabilizer Bar Assembly for Ride and Roll Balance
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Solution Overview
Problem
Conventional stabilizer bars in vehicle suspension systems have fixed roll stiffness, which compromises either turning stability or ride comfort, and active roll stabilization systems using sensors and actuators are costly and difficult to implement widely.
Innovation Solution
A stabilizer bar assembly with variable roll stiffness achieved through a mechanical connection mechanism using an outer cylinder member, an inner cylinder member, and torsion springs, allowing for relative rotation and adjustable roll stiffness without sensors or actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If roll stiffness is increased by making the stabilizer bar harder, then turning stability is improved, but ride comfort deteriorates when driving straight
Solution Approach 1:
The stabilizer bar assembly employs a dual-cylinder mechanism with torsion springs that enable dynamic adjustment of roll stiffness. The inner and outer cylinder members can rotate relative to each other, allowing the system to adaptively change its mechanical properties based on driving conditions, thus improving both turning stability and ride comfort without fixed compromise
Solution Approach 2:
The invention changes the physical state and mechanical parameters of the stabilizer bar through the relative rotation of inner and outer cylinder members. This rotation alters the engagement state of torsion springs and stoppers, transitioning the system between different stiffness states to optimize performance for different driving scenarios
2Ease of operation
If roll stiffness is decreased by making the stabilizer bar softer, then ride comfort is improved when driving straight, but turning stability deteriorates
Solution Approach 1:
The stabilizer bar assembly employs a dual-cylinder mechanism with torsion springs that enable dynamic adjustment of roll stiffness. The inner and outer cylinder members can rotate relative to each other, allowing the system to adaptively change its mechanical properties based on driving conditions, thus improving both turning stability and ride comfort without fixed compromise
3Stability of the object's composition
If active roll stabilization system with sensors and actuators is used to control roll stiffness in real time, then both turning stability and ride comfort are improved, but system cost and complexity increase
Solution Approach 1:
The stabilizer bar assembly uses a self-regulating mechanical design where the relative rotation of inner and outer cylinder members automatically engages or disengages torsion springs and stoppers based on applied loads. This passive mechanism eliminates the need for sensors, actuators, and control systems, achieving adaptive roll stiffness control without electronic complexity
Solution Approach 2:
The invention replaces complex electronic control systems (sensors, actuators, controllers) with a purely mechanical solution. The dual-cylinder assembly with torsion springs and stoppers creates a mechanically self-regulating system that achieves active roll stabilization through mechanical interactions alone, significantly reducing system complexity and 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
Improves turning stability and ride comfort by generating primary and secondary roll stiffness, reducing the number of parts and costs compared to traditional systems.
Implementation Method 1
a torsion spring providing rotational stiffness to the inner cylinder member and the outer cylinder member, which can rotate relatively
Data Source
AI summary
A stabilizer bar assembly may include left and right bars, an outer cylinder member connected to one of the left bar and the right bar, an inner cylinder member provided inside the outer cylinder member to enable relative rotation with the outer cylinder member, and connected to the other one of the left bar and the right bar, and a torsion spring providing rotational stiffness to the inner cylinder member and the outer cylinder, which rotate relatively.