Exhaust Vortex Pipe Spiral Flow Resistance Reduction
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Solution Overview
Problem
Internal combustion engines face reduced output and efficiency due to resistance in the exhaust process, leading to incomplete discharge of exhaust gases, which increases pollution and noise, and existing vortex devices struggle with pressure drops and large occupied areas, hindering smooth gas flow.
Innovation Solution
An exhaust fumes reduction device comprising a housing pipe with a vortex pipe and an external pipe, where the vortex pipe generates a spiral vortex to increase exhaust gas speed, and the external pipe introduces outside air to assist in smooth discharge, using a spiral guide ring to enhance airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional exhaust system with catalyst and muffler is used, then exhaust gas purification is achieved, but exhaust flow resistance increases significantly
Solution Approach 1:
The patent employs curved guide vanes and spiral flow paths instead of straight linear paths. The exhaust gas is directed through curved surfaces that guide the flow smoothly around the catalyst chamber, reducing turbulence and pressure loss while maintaining contact time for purification.
Solution Approach 2:
The patent transitions from a one-dimensional linear exhaust path to a three-dimensional spiral flow pattern. The exhaust gas enters axially and is redirected into a swirling motion that moves radially and axially through the catalyst chamber, increasing the effective flow path length and purification contact area without increasing linear dimensions.
2Speed
If vortex fans are added to improve exhaust gas discharge, then discharge speed increases, but pressure drop increases and device area increases
Solution Approach 1:
The patent removes the complex vortex fan mechanism from the exhaust system and replaces it with passive aerodynamic guide vanes. The swirling motion is generated naturally by the geometry of the guide vanes rather than by an active mechanical fan, eliminating the need for additional power and reducing pressure losses associated with mechanical components.
Solution Approach 2:
The exhaust gas itself generates the swirling motion through its own kinetic energy and pressure, guided by the fixed vanes. The system uses the exhaust flow's own properties to create the vortex pattern without requiring external energy input or active control mechanisms.
3Productivity
If valve overlap occurs during four-stroke operation, then intake and exhaust cycles are completed, but exhaust gas is reintroduced into the cylinder causing vacuum state and primary exhaust pressure
Solution Approach 1:
The patent creates a pre-established swirling flow pattern in the exhaust manifold before the valve overlap occurs. This pre-generated vortex creates a pressure buffer that resists the sudden vacuum drop during valve overlap, preventing exhaust gas from being drawn back into the cylinder.
Solution Approach 2:
The patent changes the flow parameters of the exhaust gas by inducing a high-velocity spiral motion. This transforms the exhaust flow from a simple axial flow to a complex three-dimensional vortex flow, altering the pressure distribution and momentum characteristics to resist backflow during valve overlap.
4Object-affected harmful factors
If exhaust gas passes through honeycomb catalyst with fine ventilation holes, then purification is achieved, but flow velocity is significantly reduced forming secondary exhaust pressure
Solution Approach 1:
The patent uses curved guide vanes that direct exhaust gas through the catalyst in a swirling pattern. This curved flow path maintains higher velocities compared to straight-through designs by utilizing centrifugal forces and reducing flow separation at the catalyst walls.
Solution Approach 2:
The patent adds a rotational dimension to the exhaust flow through the catalyst chamber. Instead of flow only in the axial direction, the spiral motion introduces a radial and tangential component, effectively increasing the flow path length and maintaining velocity through three-dimensional flow patterns.
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 enhances discharge capacity and speed of exhaust gases, reducing re-inflow and delayed discharge issues, thereby improving engine output, fuel efficiency, and reducing emissions.
Implementation Method 1
a vortex pipe (20) which is mounted inside the housing pipe (10) and allows the exhaust gas passing through the housing pipe (10) to be discharged while generating a vortex
Implementation Method 2
a venturi part (22) whose diameter is reduced from the rear of the inlet part (21)
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present invention relates to an exhaust fumes reduction device for an internal combustion engine. More particularly, the present invention relates to reducing the generation of exhaust fumes and improving output and fuel efficiency by smoothing the discharge flow of exhaust gas in a state additionally mounted at the end of an exhaust line of an internal combustion engine used for ships, vehicles, and various industrial machines, there is provided the exhaust fumes reduction device for internal combustion engine mounted at the end of an exhaust port of the internal combustion engine to smooth the discharge flow of exhaust gas comprising; a housing pipe 10 connected to the end of the exhaust pipe 2 to discharge exhaust gas; a vortex pipe 20 mounted inside the housing pipe to increase the speed of the exhaust gas introduced into the housing pipe and to discharge the exhaust gas spirally; and an external pipe 30 mounted on the outside of the housing pipe and in communication with the housing pipe to allow the outside air to flow in and to assist the smooth discharge of exhaust gas discharged to the housing pipe.