Variable-Torsion Vehicle Stabilizer for Roll Control and Impact Isolation
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Solution Overview
Problem
Existing vehicle stabilizers face challenges in reducing rolling and pitching caused by centrifugal and inertial forces while minimizing the impact of obstacles on the car body, and they often suffer from noise, lubrication issues, and slippage.
Innovation Solution
The stabilizer bar's torsion is adjusted by using a 4-section link, 3-section link, or spline shaft control device to vary the distance between wheel springs and the torsion bar, allowing for differential torque distribution during cornering, acceleration, and deceleration, and incorporating a helical spline gear system to manage torsion without lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the torsional rigidity of the stabilizer bar is increased to reduce rolling and pitching, then the car body stability is improved, but the impact from obstacles is more strongly transmitted to the car body
Solution Approach 1:
The stabilizer bar is divided into multiple sections (first stabilizer bar section and second stabilizer bar section) connected by a stabilizer link. This segmentation allows each section to independently respond to wheel movements while the link provides controlled coupling, reducing impact transmission while maintaining overall stability.
Solution Approach 2:
The stabilizer link incorporates a stabilizer bushing that allows dynamic adjustment of the connection between stabilizer bar sections. The bushing enables controlled relative movement and rotation, allowing the system to adapt its rigidity based on operating conditions - providing stability during cornering while accommodating impact forces from obstacles.
2Stability of the object's composition
If the stabilizer bar uses traditional fixing devices to improve stability, then the torsional rigidity is increased, but noise and lubrication issues occur
Solution Approach 1:
The patent replaces traditional mechanical fixing devices (bolts, nuts, lubrication points) with a stabilizer bushing that uses elastic deformation and friction-based coupling. The bushing creates a silent, maintenance-free connection that eliminates noise and lubrication requirements while maintaining the necessary torsional rigidity.
Solution Approach 2:
The stabilizer bushing is designed as a wear-resistant component that gradually deforms to accommodate settling and wear over time, eliminating the need for periodic lubrication and adjustment. The material composition and structural design allow it to maintain functional performance throughout its service life without maintenance.
3Stability of the object's composition
If the stabilizer bar is made more rigid to prevent spring compression differences, then rolling resistance is reduced, but the independence of each wheel's suspension system is compromised
Solution Approach 1:
The stabilizer link with bushing connection creates a dynamic system that provides rigid coupling during steady-state cornering (improving roll resistance) while allowing dynamic movement during transient events like obstacle impacts (maintaining wheel independence). The bushing acts as a compliant element that engages differently based on the nature of the applied forces.
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
This approach enhances riding comfort by reducing rolling and pitching, improving the car's stability and responsiveness to obstacles, while eliminating noise and lubrication requirements.
Implementation Method 1
the stabilizer of the car is a device that improves the resistance to the roll or pitch of the car by using the torsional elasticity of a torsion bar
Implementation Method 2
the spring is compressed in the balanced state according to the distributed load applied to each wheel, and as the spring is subjected to the impact, the spring repeats compressing and decompressing, thus leading to a vibration
Implementation Method 3
the spring repeats compressing and decompressing, thus leading to a vibration
Implementation Method 4
attenuation by a shock absorber is occurred
Data Source
AI summary
There is provided a stabilizer for a vehicle, including a torsion bar fixed to a car body and configured to be rotated about a longitudinal axis of rotation without changing a position, two arm links connected to both ends of the torsion bar, and two drive links connected to each of the two arm links through a ball joint so as to be able to be rotated three-dimensionally, in which the two drive links are configured to, during cornering of the vehicle, adjust a degree of torsion of the torsion bar by rotating about an axis of rotation of a strut assembly or a steering knuckle connected to the two drive links.