Vibration Absorbing Mounting Device Fluid Chamber Segmentation

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Solution Overview

Problem

Existing vibration absorbing mounting devices for vehicles face challenges in effectively attenuating both horizontal and vertical vibrations, leading to noise and discomfort during idle and rapid acceleration states, as they either increase secondary vibrations or fail to adequately transmit vibrations to the vehicle body.

Innovation Solution

A vibration absorbing mounting device with a complex fluid-filled chamber system, including a core, nozzle valves, and an elastic member, which moves fluid between chambers to absorb vibrations by adjusting chamber volumes and pressures, thereby reducing noise and vibration through fluid flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the modulus of elasticity of the mounting device is increased, then vibration and noise are reduced when the engine is idle, but secondary vibration is generated that makes the vehicle bounce while the vehicle is running

Engineering Contradiction:

Improvevibration and noiseVSAvoidsecondary vibration

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The mounting device is divided into multiple functional segments: a first mounting device handles vertical vibrations using a fluid chamber system, while a second mounting device handles horizontal vibrations using a rubber elastic body. This segmentation allows each segment to optimize for its specific vibration direction without generating unwanted secondary vibrations in other directions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting device uses dynamic characteristics of fluid pressure changes in the first mounting device for vertical vibrations and elastic deformation of the rubber body in the second mounting device for horizontal vibrations. This dynamic response adapts to different vibration conditions without generating secondary vibrations.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the modulus of elasticity of the mounting device is decreased, then the structure becomes more flexible, but vibration and noise transmission from the engine to the vehicle body increases when the engine is idle or while the vehicle is running

Engineering Contradiction:

ImproveflexibilityVSAvoidvibration and noise transmission

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first mounting device uses a fluid chamber system where pressure changes in the fluid absorb vertical vibrations. This hydraulic approach provides flexibility while maintaining vibration isolation, avoiding the need for high modulus materials that would transmit vibrations.

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 device efficiently attenuates both horizontal and vertical vibrations by utilizing fluid movement between chambers, providing a quiet and comfortable ride during engine idle and rapid acceleration states.

Implementation Method 1

fluid is filled in the first chamber and the second chamber... fluid moves to the second chamber or the first chamber through the first nozzle formed in the first nozzle valve and thereby attenuates horizontal vibration

Methodology Applied

Scientific EffectFluid movement:

Implementation Method 2

a space of the first chamber or second chamber is reduced, so that the fluid filled therein moves to the second chamber or the first chamber through the first nozzle

Methodology Applied

Scientific EffectPressure change:

Implementation Method 3

an elastic member formed in a space between the core and the inner housing and between the inner housing and the outer housing

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS8973704B2Vibration absorbing mounting device

Publication Date: 2015.03.10 HYUNDAI MOTOR CO LTD

AI summary

A vibration absorbing mounting device may include an outer housing, a mounting shaft, a core, a first nozzle valve spaced apart from and disposed below the core, an inner housing spaced apart from one side and the other side of the core, with the first nozzle valve being mounted to the inner housing, and a chamber separator fixed to the core and brought into close contact with and sliding on the first nozzle valve, wherein the chamber separator forms a first chamber and a second chamber, and an elastic member formed between the core and the inner housing and between the inner housing and the outer housing, wherein fluid is filled in the first chamber and the second chamber, and a first nozzle fluidly-connecting the first and second chambers is formed in the first nozzle valve.