Rear Wheel Suspension Elastic Bushing Fuel Duct Guidance
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Solution Overview
Problem
Existing rear wheel suspension designs for automobiles face challenges in accommodating movement and fuel duct guidance, particularly with trailing arms that require play in multiple directions and interfere with fuel ducts.
Innovation Solution
A rear wheel suspension system featuring wheel carriers connected by torsion-flexible crossmembers, with an elastic bushing and axle arrangement that allows rotational and translational movement, while maintaining a stationary base frame to direct fuel ducts closely past the suspension components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the trailing arm end surrounds the bushing with play in multiple directions, then the wheel carrier can move elastically, but the fuel duct guidance becomes complex and requires additional space
Solution Approach 1:
The patent inverts the conventional arrangement by making the bushing stationary relative to the body while the wheel carrier end moves within it. This reversal eliminates the need for the bushing to accommodate multi-directional play, simplifying fuel duct guidance while preserving wheel carrier mobility through the elastic bushing's inherent compliance
Solution Approach 2:
The patent extracts the movement function from the bushing-base frame interface and relocates it to the wheel carrier-bushing interface. The bushing remains stationary in the base frame, while the wheel carrier end moves elastically within the bushing, separating the movement capability from the duct guidance requirement
2Adaptability or versatility
If play is provided in the base frame for the trailing arm end, then movement is enabled, but the body structure requires larger dimensions and reduced rigidity
Solution Approach 1:
The patent applies local quality by concentrating the elastic movement function entirely within the bushing component at the wheel carrier interface. The base frame and body structure maintain rigid, precise dimensions without requiring play, while the bushing's elastic properties provide the necessary compliance locally at the suspension mounting point
3Adaptability or versatility
If the bushing is made elastic to enable translatory displacements, then movement freedom is improved, but the structural rigidity of the connection is reduced
Solution Approach 1:
The patent changes the physical state parameter of the bushing from rigid to elastic, allowing it to provide controlled translatory displacements while maintaining connection integrity. The elastic bushing accommodates movement through material deformation rather than mechanical play, preserving connection strength while enabling the required freedom of movement
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 design enhances driving dynamics and comfort by providing elastic rotational freedom and maintaining a rigid body rotational degree of freedom, allowing for efficient fuel duct guidance without additional space requirements, thereby increasing the body's rigidity and strength.
Implementation Method 1
the bushing is constructed elastically, in particular from one or more plastics and/or synthetic and/or natural rubber, in order in particular to enable slight translatory displacements of the axle against the body
Implementation Method 2
the axle can, in an embodiment, define a rotation axis of the wheel carrier against the body
Implementation Method 3
Two wheel carriers can be connected with one another by one or more, in particular torsion-flexible, crossmembers
Data Source
AI summary
A rear wheel suspension and a motor vehicle with such a rear wheel suspension are provided. The rear wheel suspension includes a wheel carrier configured for the rotatable bearing of a rear wheel, wherein the wheel carrier has at an end on a body side, a bearing for connection to a body with an axle, a bushing, and a base frame. The axle rests in the bushing. The axle is arranged on a bearing region of the wheel carrier, and the bushing rests in an aperture of the base frame.