Vehicle Suspension Link With Transverse Spring For Oversteer Control
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Solution Overview
Problem
Modern independent wheel suspensions in motor vehicles tend to experience oversteer due to the flexibility of pivot bearings, which impairs wheel guidance and ride comfort, especially during cornering.
Innovation Solution
The implementation of a spring unit between the link and the vehicle body, configured to produce a force component directed outward along the transverse axis, which increases during compression, counteracts oversteer by providing a stabilizing force component that compensates for lateral forces during cornering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If flexible pivot bearings are used in the independent wheel suspension, then ride comfort is improved by reducing vibration transmission, but oversteer occurs during cornering due to excessive flexibility
Solution Approach 1:
The patent changes the mechanical parameters of the suspension system by introducing a spring element with specific stiffness characteristics. The spring constant is designed to provide minimal resistance during vertical motion (maintaining ride comfort) while generating sufficient lateral restoring force to counteract oversteer during cornering, thus optimizing the balance between comfort and stability
Solution Approach 2:
The suspension system transitions from a static flexible connection to a dynamic system where the spring force adapts to loading conditions. During cornering, the increased compression of the spring automatically generates higher lateral force to counteract oversteer, while during normal vertical motion the spring remains relatively compliant, providing dynamic adjustment of stiffness based on operational conditions
2Device complexity
If passive spring units are used instead of active components, then device complexity is reduced, but the ability to actively control wheel guidance is limited
Solution Approach 1:
The spring unit operates autonomously based on the physical principles of elasticity and force vectoring. It automatically generates the necessary lateral force to counteract oversteer without requiring external control systems, sensors, or active actuators. The spring's geometric configuration and material properties enable it to self-regulate the wheel guidance forces based on the suspension's instantaneous state
Solution Approach 2:
The spring unit is designed to provide separate force components: a vertical component for supporting vehicle weight and a lateral component for counteracting oversteer. This segmentation of force functions within a single passive element achieves reliable wheel guidance without the complexity of multiple active control systems
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 solution effectively reduces or prevents oversteer in independent wheel suspensions by providing a passive, load-dependent stabilizing force that enhances ride comfort and wheel alignment, without requiring additional active components or complex structures.
Implementation Method 1
a spring to be disposed between the link and the vehicle body. The spring is configured to produce a force component on the link that is directed outward along a transverse axis of the motor vehicle and that increases during compression
Data Source
AI summary
Independent wheel suspensions for a motor vehicle are described herein. An example independent wheel suspension includes a link to be pivotably coupled to a vehicle body of the motor vehicle via a first flexible pivot bearing and a second flexible pivot bearing. The first and second flexible pivot bearings form a pivoting axis. The link has a wheel attachment point to which a vehicle wheel is to be coupled. The example independent wheel suspension also includes a spring to be disposed between the link and the vehicle body. The spring is configured to produce a force component on the link that is directed outward along a transverse axis of the motor vehicle and that increases during compression.