Air Spring Linearization for Trike Suspension
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Solution Overview
Problem
Existing vehicle suspension systems for three-wheeled motorcycles lack independent suspension and effective shock-absorbing mechanisms, particularly those suited for use with independent suspension systems, and do not address the need for vibration dampening in trike configurations.
Innovation Solution
The implementation of a rear frame/axel assembly with a differential supported on a frame assembly, featuring two half-shaft assemblies pivotally connected to the differential, an air spring linearization assembly with NVH bushings for compressing and decompressing along a linear axis, and a vibration dampening mechanism using elastomeric washers and bushings to reduce vibration transfer from the differential to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional rigid rear axle assembly is used, then structural simplicity is maintained, but shock absorption capability and vibration dampening are insufficient
Solution Approach 1:
The rigid rear axle assembly is segmented into two independent half-shaft assemblies, each with its own air spring suspension system. This allows independent suspension operation for each wheel, improving shock absorption capability while maintaining reasonable system complexity through modular design
Solution Approach 2:
Air springs are introduced as the suspension mechanism, using pneumatic pressure to provide shock absorption and vibration dampening. The air springs replace conventional mechanical suspension components, offering adjustable damping characteristics and improved comfort
2Object-affected harmful factors
If air springs are used for suspension, then shock absorption is improved, but the axis of compression becomes non-linear affecting performance
Solution Approach 1:
A spherical interface is introduced between the air spring and the pivot bracket, allowing the air spring to pivot while maintaining a consistent linear axis of compression. This spherical connection point ensures that the compression force remains aligned with the air spring's central axis regardless of suspension movement, improving performance stability
Solution Approach 2:
A pivot bracket with a spherical interface acts as an intermediary between the air spring and the vehicle frame. This intermediary component allows rotational movement while constraining the compression axis to remain linear, decoupling the pivot motion from the compression direction
3Object-affected harmful factors
If independent suspension with half-shaft assemblies is implemented, then ride comfort is improved, but differential support stability may be compromised
Solution Approach 1:
The differential support structure is merged with the frame assembly, creating a rigid and stable mounting point. This integration ensures that the differential remains firmly supported while the half-shaft assemblies provide independent suspension movement, maintaining both ride comfort and differential stability
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 configuration provides improved shock absorption and vibration reduction, allowing for better ride comfort and stability by maintaining a predominantly horizontal axis of compression and effectively dampening vibrations, while also allowing for toe and camber adjustments for optimal tire alignment.
Implementation Method 1
a vibration dampening mechanism using elastomeric washers and bushings to reduce vibration transfer from the differential to the frame
Implementation Method 2
an air spring linearization assembly with NVH bushings for compressing and decompressing along a linear axis
Implementation Method 3
an air spring linearization assembly with NVH bushings for compressing and decompressing along a linear axis
Data Source
AI summary
A suspension system for a motor vehicle including a frame assembly; a differential supported on the frame assembly; a wheel hub connected to each of two half shaft assemblies engaging the differential and being pivotally connected to the frame assembly; and at least one air spring operatively positioned between the frame assembly and each of the wheel hubs. The air springs are connected to a rotating linkage which maintains a substantially linear axis of compression for the air springs.