Enclosed Volume Exhaust Diffuser for Diesel Emission Cooling
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Solution Overview
Problem
Existing exhaust systems fail to effectively cool exhaust gases as they leave the tailpipe, leading to safety hazards and discomfort due to high temperatures, especially during diesel engine particulate filter regeneration, which increases exhaust temperatures and poses risks to humans, animals, and plants.
Innovation Solution
An apparatus and method involving an enclosed volume diffuser with an inlet and outlet configuration where the outlet is larger in cross-section than the inlet, allowing exhaust gases to expand and slow within the volume before being expelled into the atmosphere, thereby reducing temperature and improving cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If exhaust treatment devices are used to control emissions, then emission control is improved, but exhaust temperature increases creating safety hazards
Solution Approach 1:
The exhaust stream is divided into multiple separate outlets arranged in a pattern, allowing the hot exhaust gas to be dispersed into smaller streams that cool more rapidly as they exit and mix with ambient air, thereby reducing the temperature hazard while maintaining emission control functionality
Solution Approach 2:
The exhaust gas flow is transitioned from a single concentrated stream to a multi-dimensional dispersed pattern through the arranged outlets, increasing the surface area for heat dissipation and accelerating cooling without compromising the emission treatment effectiveness
2Temperature
If water spray device is used for exhaust cooling, then exhaust temperature is reduced, but device complexity and operational difficulty increase
Solution Approach 1:
The exhaust system cools itself through the geometric design of the multi-outlet configuration, which naturally disperses and accelerates cooling through increased surface area and ambient air mixing, eliminating the need for external water spray systems or complex active cooling mechanisms
Solution Approach 2:
Ambient air acts as an intermediary cooling medium that mixes with the exhaust streams as they exit the multiple outlets, providing passive cooling without requiring active cooling systems, water supplies, or complex operational controls
3Object-affected harmful factors
If operator warning system is implemented, then safety is improved, but cost and operational intervention requirements increase
Solution Approach 1:
The exhaust gas is cooled in advance through the multi-outlet dispersion design before it can reach dangerous temperatures at the tailpipe, proactively preventing safety hazards rather than warning operators after temperatures become dangerous, thereby eliminating the need for complex sensors and control systems
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 mitigates exhaust gas temperatures before they reach dangerous levels, enhancing safety and reducing the risk of injury or discomfort, while maintaining a smaller pressure drop and being suitable for larger engines and machines.
Implementation Method 1
The housing is configured to receive the exhaust gases through the inlet. An outlet larger in cross-section than the inlet in cross-section is disposed on the housing and configured to expel the exhaust gases from the housing into the atmosphere.
Data Source
AI summary
An apparatus, system, and method for cooling exhaust gases includes an inlet operatively connected to an exhaust port from a diesel engine or the like, and a housing defining a substantially enclosed volume. At least a portion of the volume is larger in cross-section than the inlet in cross-section, such that the exhaust gases expand upon entering the housing from the inlet. At least one outlet larger in collective cross-section than the inlet in cross-section is disposed on the housing and configured to expel the exhaust gases from the housing into the atmosphere.