Hydraulic Mount Separating Element With Multi-Opening Duct Inlet

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Solution Overview

Problem

Existing hydraulic anti-vibration modules for mounting engines on vehicles are limited in their ability to effectively damp a broad range of vibration frequencies, leading to unsatisfactory damping and noise generation from cavitation bubbles.

Innovation Solution

A separation element with a first duct having multiple openings at its inlet and a single opening at its outlet, which increases fluid resistance and friction, broadening the range of damped frequencies and reducing noise by splitting cavitation bubbles into smaller ones that implode over more limited frequency ranges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single opening is used in the first mouth of the separation element, then the passage cross section is larger, but the range of damped vibration frequencies is narrow and damping is insufficient

Engineering Contradiction:

Improverange of damped vibration frequenciesVSAvoiddamping performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The first mouth is divided into multiple openings instead of using a single opening. This segmentation increases the total surface area of the mouth while maintaining or reducing the passage cross-section, thereby increasing fluid resistance and friction. This allows the system to effectively damp a broader range of vibration frequencies while maintaining satisfactory damping performance across the extended frequency range.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a single large opening is used in the first mouth, then the passage cross section is greater, but cavitation bubbles are not split and generate more noise and vibration

Engineering Contradiction:

Improvenoise and vibration from bubble implosionVSAvoidpassage cross section of first mouth

Core Design Contradiction:

Object-affected harmful factorsVSVolume of stationary object

Solution Approach 1:

The first mouth is segmented into multiple smaller openings. When cavitation bubbles pass through these multiple openings, they are split into smaller bubbles. The implosion of these smaller bubbles generates significantly less noise and vibration compared to the implosion of large bubbles, thereby reducing the harmful acoustic and vibrational effects in the system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The parameters of the first mouth are changed by dividing it into multiple openings with specific size and arrangement characteristics. This modification alters the fluid dynamics and bubble behavior, causing bubbles to be fragmented into smaller sizes that produce less noise and vibration upon implosion, thus reducing the harmful effects.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If multiple openings are created in the first mouth, then fluid resistance and friction increase to broaden damping range, but the structure becomes more complex

Engineering Contradiction:

Improverange of damped vibration frequenciesVSAvoidstructure of separation element

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The separation element is designed to perform multiple functions through its structured first mouth with multiple openings. It simultaneously increases fluid resistance for broadening the damping frequency range, splits cavitation bubbles to reduce noise, and maintains structural integrity. This multi-functionality is achieved within a single integrated component rather than requiring multiple separate elements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enhances damping over a broader range of vibration frequencies while reducing noise and vibration amplitude, improving the reliability and adjustability of the damping system.

Implementation Method 1

the first mouth comprising a plurality of openings makes it possible to increase the fluid resistance and/or the friction at the first mouth

Methodology Applied

Scientific EffectFluid resistance: Drag

Implementation Method 2

increase the fluid resistance and/or the friction at the first mouth (at hence the fluid resistance and/or the friction of the first duct)

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

bubbles generated by cavitation are split, by the plurality of openings of the first mouth, into a plurality of small bubbles

Methodology Applied

Scientific EffectCavitation: Cavitation

Data Source

PatentUS11801745B2Separating element for an anti-vibration hydraulic module and anti-vibration hydraulic module equipped with such a separating element

Publication Date: 2023.10.31 VIBRACOUSTIC NANTES SAS

AI summary

A separation element is configured to separate a working chamber from a compensation chamber of a hydraulic anti-vibration module for mounting an engine on a vehicle body. The separation element includes a first duct extending between a first mouth and a second mouth. In embodiments, the first mouth is provided in a first face of the separation element and is configured to be fluidically connected to the working chamber, and the second mouth is provided in a second face of the separation element and is configured to be fluidically connected to the compensation chamber. In embodiments, the first mouth includes a plurality of openings.