Hydroelastic Body Mount With Compact Hydraulic Damping Layout
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Solution Overview
Problem
Existing fluid-filled vibration damping mounts for vehicles face challenges in restricted packaging spaces and require a lightweight, one-piece design that effectively provides damping and travel-limiting characteristics while being difficult to assemble.
Innovation Solution
A body mount system comprising a first support member engaging the vehicle body and a second support member engaging the vehicle frame, with a tubular portion, elastomeric springs, and a hydraulic damping system that includes fluid chambers and tracks to manage vibration damping, allowing for adjustable damping characteristics and assembly in limited spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fluid filled vibration damping mounts are used, then damping characteristics are provided, but packaging space requirements increase and assembly becomes challenging
Solution Approach 1:
The elastomeric springs are nested within the tubular portion and housing of the second support member, creating a compact concentric arrangement. The first elastomeric spring is positioned within the tubular portion, while the second, third and fourth elastomeric springs are positioned within the housing, maximizing space utilization and reducing overall mount volume.
Solution Approach 2:
The mount transitions from a traditional two-surface compression design to a multi-dimensional structure with elastomeric springs arranged in radial and axial positions. The tracks extend radially outward from the central axis, creating a three-dimensional damping system that provides effective vibration control in restricted packaging spaces.
2Reliability
If traditional mounting systems are used, then vibration damping is provided, but the structure becomes complex and difficult to assemble
Solution Approach 1:
The mount integrates multiple damping mechanisms into a single unified structure. The first support member, second support member, tubular portion, housing, and multiple elastomeric springs are combined into one assembly that provides both radial and axial vibration damping through integrated hydraulic damping systems and elastomeric elements.
Solution Approach 2:
The mount is divided into distinct functional segments: the first support member for body engagement, the second support member with tubular portion and housing for frame engagement, and multiple elastomeric springs positioned at different locations. This segmentation allows for modular assembly while maintaining overall structural integrity and damping performance.
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 solution provides effective vibration damping and travel limitation in restricted packaging spaces, offering a lightweight, one-piece mount that is easier to assemble and allows for tuning of damping characteristics, enhancing the performance of vehicle mounts.
Implementation Method 1
A first elastomeric spring interconnects the inner tube and the second support member. The second, third and fourth elastomeric springs are positioned within the housing.
Implementation Method 2
A hydraulic damping system is disposed on a side of the second support surface opposite the first support member and includes a housing coupled to the second support member.
Data Source
AI summary
A body mount comprises a first support member adapted to engage a body of a vehicle and a second support member adapted to engage a frame of the vehicle. The second support member includes a tubular portion disposed radially inward of a second support surface. A first elastomeric spring interconnects an inner tube and the second support member. The first elastomeric spring is positioned within the tubular portion. A hydraulic damping system is disposed on a side of the second support surface opposite the first support member and includes a housing coupled to the second support member. Second, third and fourth elastomeric springs are positioned within the housing. The second elastomeric spring and the third elastomeric spring are spaced apart by a first track. The third elastomeric spring and the fourth elastomeric spring are spaced apart by a second track.