Vertical Exhaust Support Frame for Vibration-Isolated Mounting

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Solution Overview

Problem

Conventional mounting arrangements for vertical exhaust components on heavy trucks, such as SCR catalyst bodies and diesel particulate filters, often transmit vibration to the vehicle cab, causing noise and instability due to reliance on a cab-connected bracket.

Innovation Solution

A free-standing mounting support framework that surrounds the exhaust component, comprising a base mountable on the vehicle frame, rods extending upward to define a perimeter, and interconnected rings or bosses for securing the component, allowing for torsional resistance and thermal expansion, without a direct connection to the cab.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cab-connected bracket is used to mount vertical exhaust components, then the component is supported, but vibration and noise are transmitted to the cab

Engineering Contradiction:

Improvesupport stabilityVSAvoidvibration and noise transmission

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The mounting system is segmented into separate functional elements: a base mount attached to the vehicle frame, multiple vertical rods providing support, and rings that secure the exhaust component. This segmentation isolates the exhaust component from the cab structure, preventing vibration transmission while maintaining support stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The framework acts as an intermediary structure between the vehicle frame and the exhaust component. It provides the necessary support and positioning while isolating the cab from harmful vibrations through its independent mounting on the vehicle frame rather than connecting to the cab.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a single vertical stanchion is used to support the exhaust component, then the structure is simple, but the component rotates under lateral forces

Engineering Contradiction:

Improvesupport structure simplicityVSAvoidresistance to rotational movement

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

Instead of a single stanchion, the support function is segmented into multiple vertical rods distributed around the exhaust component. This segmentation provides both lateral stability and resistance to rotational forces while maintaining relative structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support system transitions from a single-point support (one dimension of support) to a distributed multi-point support system. The multiple rods arranged in a perimeter configuration provide support in multiple dimensions, preventing rotation while maintaining simplicity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Strength

If rigid connections are used to secure the exhaust component, then the component is firmly supported, but thermal expansion is restricted

Engineering Contradiction:

Improvesecuring forceVSAvoidaccommodation of thermal expansion

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The connection system incorporates dynamic elements that allow for thermal expansion. The rings with tensioning devices can accommodate changes in component dimensions while maintaining securing force, adapting to thermal effects rather than restricting them.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The connection system allows for parameter changes in the exhaust component, specifically dimensional changes due to thermal expansion. The tensioning devices and mounting configuration permit these parameter changes while maintaining adequate securing force.

Inventive Principle:

Principle #35Parameter changes

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 effectively reduces noise and vibration by providing a stable, torsion-resistant support for vertical exhaust components, allowing for thermal expansion and accommodating vehicle movements without transmitting forces to the cab, thus enhancing the operational stability and reducing noise.

Implementation Method 1

the framework of the invention provides a support that can resist torsional loading on the exhaust component

Methodology Applied

Scientific EffectTorsional resistance:

Implementation Method 2

the sleeves are sized to allow rotation on the rods to accommodate small movements and vibration of the exhaust component

Methodology Applied

Scientific EffectVibration accommodation: Vibration

Implementation Method 3

an upper ring is interconnected to the plurality of rods by sleeves slidably engaging the rods. The upper ring, supported from beneath by the lugs, may slide upwardly on the rods as the exhaust component expands under heating

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS9090158B2Support for vertically mounted exhaust components

Publication Date: 2015.07.28 VOLVO TRUCK CORP

AI summary

A mounting arrangement for a vertically oriented exhaust system component includes a base member mountable to a vehicle frame with a plurality of upstanding rods fixed to the base member. At least one clamping band is interconnected with the plurality of rods and can be clamped onto an exhaust component. The arrangement is advantageous for heavy components such as SCR catalyst bodies and diesel particulate filters.