Vehicle Suspension System with Swing Arm for Cornering Stability
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Solution Overview
Problem
Current vehicle suspension systems, particularly independent suspension systems like MacPherson-type, suffer from low lateral stiffness, poor stability, and increased cornering sway, leading to safety hazards during high-speed driving due to reduced ground contact and increased rollover risk.
Innovation Solution
A suspension system incorporating a damper, rocker arm, swing arm, and universal structure with a ball rod and spherical shell, allowing for free deflection and enhanced rotation, which maintains vehicle wheels in contact with the ground during turns and deflections, thereby improving stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If independent suspension system (MacPhersan-type) is adopted, then structure is simple and manufacturing cost is low, but lateral stiffness is small and stability is poor
Solution Approach 1:
The patent combines elements of independent and dependent suspension systems by using a swing arm that connects both left and right suspension units to a common pivot point on the vehicle frame. This merging approach allows each wheel to move independently vertically while coupling their lateral movements, thereby improving lateral stiffness and stability without completely adopting a complex dependent suspension structure.
Solution Approach 2:
The swing arm is designed to dynamically adjust the connection between left and right suspension units based on vehicle motion. During normal vertical movement, wheels move independently. During lateral deflection or cornering, the swing arm transfers forces between sides, dynamically enhancing stability when needed while maintaining simplicity during normal operation.
2Speed
If independent suspension system is adopted, then response is quick, but cornering sides way is great and safety is reduced
Solution Approach 1:
By merging the suspension units through the swing arm, the system maintains quick individual response of each wheel while adding lateral stability during cornering. The swing arm couples the motion of both wheels, preventing excessive body roll and cornering sidesway that plague pure independent suspension systems.
3Reliability
If double-wishbone suspension system is adopted, then vehicle wheels contact with ground is improved, but structure is complex and cost is high
Solution Approach 1:
The patent segments the suspension system into modular units (left and right suspension units with rocker arms) that can be manufactured and assembled separately. Each unit is relatively simple, but their combination through the swing arm achieves the ground contact benefits of double-wishbone systems without the full complexity.
Solution Approach 2:
The swing arm merges the functional benefits of both independent and dependent suspension, achieving improved wheel ground contact during cornering through the coupled motion of both wheels, while avoiding the complex double-wishbone structure by using a simpler rocker arm and swing arm configuration.
4Reliability
If double-wishbone suspension system is adopted, then skidding and rollover risk is reduced, but space occupation is large
Solution Approach 1:
The swing arm merges the rollover resistance benefits of dependent suspension with the space efficiency of independent suspension. By coupling the lateral motion of both wheels through a compact swing arm mechanism, the system achieves improved rollover resistance without requiring the large space occupation of traditional double-wishbone 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
The system effectively prevents wheel lift-off during turns, enhancing cornering safety and stability by ensuring both wheels remain grounded, reducing the risk of slipping and rollover, while maintaining a simple structure and low cost, suitable for small vehicles.
Implementation Method 1
the frame is also connected with the rocker arm by the damper
Implementation Method 2
the elastomeric component could absorb the impulsive force
Implementation Method 3
the elastomeric component could absorb the impulsive force when the vehicle wheels on one side receives the impulse and vibration
Data Source
AI summary
A vehicle suspension system includes a frame, a damper and a rocker arm. The frame is connected with the rocker arm through the damper, the swing part of swing arm limits the swing arm's rotation angle by matching the limit structure on the frame; the bottom of damper is provided with the universal structure, the damper is connected with the rocker arm through the universal structure, and the universal structure controls the damper in free deflection. A deviation motion of vehicle wheels on both ends by coordinating the swing arm, vibration damper, etc. to avoid the slipping and rollover due to great sides way upon vehicle steering and the lateral wheels disengagement from ground and to enhance the safety of cornering driving of vehicles.