Exhaust Dispersing Device Wedge Surface Lateral Flow

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Solution Overview

Problem

During certain engine operating conditions, such as the regeneration of particulate filters in diesel engines, exhaust temperatures can become high enough to pose risks to surrounding structures and vegetation, necessitating a solution to disperse exhaust gases effectively.

Innovation Solution

An exhaust dispersing device featuring a tubular member with a cylindrical wall and a wedge-shaped surface that protrudes into a longitudinally extending opening, designed to disperse exhaust gases laterally and downward, optionally incorporating vents to introduce ambient air and further dilute the exhaust flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a conventional exhaust outlet is used, then the exhaust system is simple in structure, but the exhaust gas concentrates in a small area causing high local temperatures that pose risks to surrounding structures and vegetation

Engineering Contradiction:

Improvelocal exhaust temperatureVSAvoidexhaust dispersing device structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The exhaust outlet is divided into multiple discharge openings arranged in an array, which segments the concentrated exhaust flow into multiple separate streams. This segmentation disperses the hot exhaust gas over a wider area, reducing the temperature concentration at any single location while maintaining the structural simplicity of the device.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The exhaust gas discharge is transitioned from a single-point outlet to a two-dimensional array of multiple openings. This dimensional change allows the exhaust to be released across a broader spatial footprint, effectively reducing local temperature concentration without adding complex mechanical components.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the exhaust gas flow is dispersed over a wide area, then the local high temperatures are reduced, but the device structure becomes more complex

Engineering Contradiction:

Improvethermal risk to surrounding structuresVSAvoiddispersing device configuration

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The outlet structure is segmented into multiple discrete discharge openings that are simple in individual design but collectively achieve wide-area dispersion. Each opening is a basic structural element, and their arrangement in an array provides the dispersal function without requiring complex mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The array of discharge openings serves multiple functions simultaneously: it disperses exhaust gas over a wide area to reduce thermal risk, maintains structural simplicity through repetitive basic elements, and provides a scalable configuration that can be adapted to different exhaust flow rates without fundamental design changes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Temperature

If vents are added to introduce ambient air, then the exhaust gas is diluted and temperatures are reduced, but the device complexity increases

Engineering Contradiction:

Improveexhaust gas temperatureVSAvoidvent system structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The ambient air intake vents are integrated into the same structural framework as the exhaust discharge openings. This merging of functions allows the device to simultaneously handle exhaust discharge and ambient air intake through a unified structural design, reducing overall complexity compared to having separate systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The vents serve as intermediary structures that facilitate the mixing of ambient air with exhaust gas. By positioning vents strategically relative to the discharge openings, they enable passive mixing and dilution of hot exhaust with cooler ambient air, reducing temperature without requiring active cooling mechanisms or complex control systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 effectively disperses exhaust gases over a wide area, reducing local high temperatures and mitigating risks to surrounding structures and vegetation by diluting the exhaust gas flow with ambient air.

Implementation Method 1

a wedge-shaped surface formed on or mounted on the second portion and protruding into the longitudinally extending opening... disperses exhaust gases laterally and downward

Methodology Applied

Scientific EffectFlow deflection:

Implementation Method 2

The vents allow ambient air to enter and dilute the exhaust gas flow before it is dispersed by the second portion

Methodology Applied

Scientific EffectGas mixing and dilution:

Data Source

PatentUS8042329B2Exhaust dispersing device for a truck

Publication Date: 2011.10.25 VOLVO TRUCK CORP

AI summary

An engine exhaust dispersing device includes a tubular member having a first portion formed as a generally cylindrical wall and adapted to be mounted in fluid communication with an exhaust outlet and a second portion formed as a longitudinally-sectioned cylindrical wall defining a longitudinally extending opening, and, a wedge surface formed on said second portion and protruding into the longitudinally extending opening, the wedge surface having an apex adjacent or in the first portion and a base at an end of the second portion, the base having a width substantially equal to a width of the second portion.