Multilayer Viscoelastic Mount for Axial Force Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Elastomeric powertrain mounts provide constant dynamic properties across frequencies but fail to adapt to varying operating conditions, limiting their effectiveness in isolating and controlling propulsion system motion.
Innovation Solution
A multilayer dampening arrangement with high and low viscoelastic layers and biasing layers, configured to dissipate axial forces and vibrations, where each layer has distinct thickness and length to adjust stiffness and damping behavior based on frequency, is integrated into the mount assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single elastomeric material is used in the powertrain mount, then the manufacturing is simple and cost-effective, but the damping performance cannot adapt to varying operating conditions and frequencies
Solution Approach 1:
The powertrain mount is segmented into multiple functional layers including viscoelastic layers, elastomeric layers, and metal layers, each with distinct damping characteristics. This segmentation allows the mount to provide adapted damping performance across varying frequencies and operating conditions while maintaining a manageable structural complexity through modular layering.
Solution Approach 2:
The invention employs composite material construction by combining viscoelastic materials, elastomeric materials, and metal components in a layered configuration. This composite approach enables the mount to leverage the advantageous properties of each material type, achieving frequency-adaptive damping performance while maintaining structural integrity and manufacturability.
2Adaptability or versatility
If the dampening arrangement uses multiple layers with distinct thickness and dimensions, then the damping behavior can be optimized for different frequencies, but the manufacturing precision requirements increase
Solution Approach 1:
By segmenting the dampening arrangement into distinct layers with defined thicknesses and dimensions, the invention enables optimized damping behavior for different frequency ranges. Each layer can be manufactured to specific dimensional tolerances independently, which actually simplifies the overall manufacturing process compared to creating a monolithic complex structure.
Solution Approach 2:
The invention applies local quality by assigning specific thicknesses, lengths, and diameters to different layers based on their functional requirements. This allows each layer to be optimized for its specific damping role while maintaining manageable manufacturing precision requirements through standardized layer configurations.
3Reliability
If the mount assembly uses a multilayer dampening arrangement, then the ability to absorb axial forces is improved, but the device complexity increases
Solution Approach 1:
The dampening arrangement is segmented into multiple layers including viscoelastic, elastomeric, and metal components, each contributing to axial force dissipation. This segmentation improves the overall reliability and force absorption capability by distributing the damping function across multiple specialized layers while maintaining a structured, manageable complexity through consistent layering patterns.
Solution Approach 2:
The invention uses composite material layers with different damping characteristics arranged in a systematic configuration. This composite structure enhances axial force dissipation capability by leveraging the complementary properties of each material type, while the organized layering approach keeps the device complexity at acceptable levels for manufacturing and assembly.
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 multilayer arrangement effectively absorbs both low and high-frequency axial forces, enhancing the mount's ability to adapt to changing conditions and improve propulsion system isolation and control.
Implementation Method 1
one or more relatively high viscoelastic layers or elastomeric layers are disposed adjacent to and cooperate with the one or more biasing layers
Implementation Method 2
one or more relatively low viscoelastic layers are disposed adjacent and cooperate with the one or more relatively high viscoelastic layers
Implementation Method 3
one or more biasing layers cooperating with the upper mounting portion and lower mounting portion
Data Source
AI summary
A mount assembly for a vehicle includes a housing having an upper mounting portion coupled to a first area of the vehicle and a lower mounting portion coupled to a second area of the vehicle. A dampening arrangement is disposed between the upper mounting portion and lower mounting portion. The dampening arrangement may include one or more biasing layers and one or more springs cooperating with the upper mounting portion and lower mounting portion. One or more relatively high viscoelastic layers are disposed adjacent to and cooperate with the one or more biasing layers. One or more relatively low viscoelastic layers are disposed adjacent and cooperate with the one or more relatively high viscoelastic layers. The one or more biasing layers, one or more relatively high viscoelastic layers, one or more relatively low viscoelastic layers and optional springs are configured to dissipate axial forces acting on the mount assembly.