Hydraulic Mount With Multi-Chamber Fluid Damping
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Solution Overview
Problem
Current hydraulic mounts lack damping capabilities in the forward and rearward directions, restricting their use in general 3-point inertia support systems and limiting their application due to insufficient vibration isolation performance in these directions.
Innovation Solution
A hydraulic mount design featuring a dual-orifice structure with first and second fluid chambers, a ring stopper, and a diaphragm, which allows for fluid communication and damping in both forward and rearward directions, enhancing vibration isolation and noise reduction by modifying the fluid movement paths and restoring forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional hydraulic mount structure is used, then damping characteristics in upward and downward directions are achieved, but damping characteristics in forward and rearward directions are lacking
Solution Approach 1:
The fluid chamber is segmented into multiple regions (first fluid chamber, second fluid chamber, third fluid chamber) separated by the diaphragm and ring stopper. This segmentation allows independent control of fluid flow paths for different directions, enabling forward-rearward damping while maintaining upward-downward damping capabilities
Solution Approach 2:
The invention extends the damping functionality from one dimension (upward-downward only) to three dimensions by adding forward-rearward damping capability through the dual-orifice structure and multi-chamber fluid system, allowing the mount to handle vibrations from multiple directions simultaneously
2Object-affected harmful factors
If a bush-type mount with damping characteristics in all directions is designed, then vibration isolation in forward and rearward directions is improved, but the mount cannot be used in general 3-point inertia support systems due to structural limitations
Solution Approach 1:
The hydraulic mount is designed with universal adaptability to function in both general 3-point inertia support systems and complex support systems. The dual-orifice structure and multi-chamber fluid system provide multi-directional damping (upward-downward and forward-rearward) that makes the mount versatile for various application scenarios without requiring different mount types
3Object-affected harmful factors
If additional parts are added to achieve damping in forward and rearward directions, then vibration isolation performance is improved, but manufacturing costs increase
Solution Approach 1:
The invention merges multiple functions into a single integrated structure. The diaphragm and ring stopper simultaneously create multiple fluid chambers and control fluid flow in multiple directions. The outer pipe, diaphragm, and main rubber member work together as an integrated assembly, eliminating the need for separate components and reducing manufacturing costs while achieving multi-directional damping
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 hydraulic mount achieves improved noise, vibration, and harshness (NVH) performance by doubling the damping frequency in the forward and rearward directions, enabling its use in higher load applications like transmission mounts without additional parts, thus reducing costs and enhancing ride and handling performance.
Implementation Method 1
a first fluid chamber and a second fluid chamber, each of which is configured by depressing both sides of an outer circumference of the main rubber member towards the core and accommodating a fluid; a third fluid chamber configured to communicate with the first fluid chamber and the second fluid chamber
Implementation Method 2
a third fluid chamber configured to communicate with the first fluid chamber and the second fluid chamber, defined in a part of the main rubber member under the core, and accommodating the fluid
Implementation Method 3
a main rubber member disposed in the outer pipe by press-fitting; a diaphragm defined on an outer pipe by vulcanization
Data Source
AI summary
A hydraulic mount includes: an outer pipe having a diaphragm defined thereon by vulcanization; a main rubber member disposed in the outer pipe by press-fitting; a core disposed inside the main rubber member; a ring stopper interposed between the diaphragm and the main rubber member; a first fluid chamber and a second fluid chamber configured by depressing both sides of an outer circumference of the main rubber member towards the core, each of the first and second fluid chambers configured to accommodate a fluid; a third fluid chamber configured to communicate with the first fluid chamber and the second fluid chamber, disposed in a part of the main rubber member under the core, and accommodating the fluid; and a fourth fluid chamber configured to communicate with the third fluid chamber and disposed between the ring stopper and the outer pipe to accommodate the fluid.