Gas Filter Flow Control Plate for Uniform Speed Distribution
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Solution Overview
Problem
Conventional gas filter devices for engines using LPG and CNG suffer from non-uniform flow speed distribution around the outlet, leading to decreased trap efficiency and the discharge of fuel residue attached to the inner wall, and pose layout flexibility issues when mounted in vehicles.
Innovation Solution
A cylindrical filter device with a hollow filter and a flow controlling plate that directs gas flow through a second chamber between the filter's outer periphery and inner wall, reducing non-uniformity by controlling the flow speed distribution and allowing flexible outlet positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the outlet is positioned on one end of the hollow filter with a straight flow path, then the device structure is simple, but non-uniform flow speed distribution occurs causing fuel residue discharge
Solution Approach 1:
A flow controlling plate is introduced as an intermediary component between the hollow filter and the outlet. This plate creates a flow controlling opening that mediates the gas flow, transforming the direct straight flow path into a controlled flow pattern that ensures uniform speed distribution across the hollow filter surface, preventing fuel residue discharge while maintaining structural simplicity
2Ease of manufacture
If the outlet is positioned eccentrically to simplify structure, then manufacturing is easier, but flow speed non-uniformity increases reducing trap effect
Solution Approach 1:
The flow controlling plate serves as a mediator that decouples the outlet position from the hollow filter. By positioning the plate between them and creating a controlled opening, it allows the outlet to be positioned conveniently while maintaining uniform flow distribution across the hollow filter, thus enabling easy manufacturing without sacrificing flow uniformity
3Speed
If a communication hole is provided to narrow the flow path, then flow speed increases, but non-uniformity of flow speed distribution becomes significant decreasing trap effect
Solution Approach 1:
Instead of uniformly narrowing the flow path which creates significant non-uniformity, the flow controlling plate creates a specifically designed flow controlling opening with optimized dimensions. This local quality control ensures that the flow speed is increased appropriately while maintaining uniform distribution characteristics, preserving the trap efficiency of the hollow filter
4Reliability
If space between hollow filter and outlet is extended to decrease flow speed non-uniformity, then trap effect improves, but filter case size increases limiting mounting positions
Solution Approach 1:
The flow controlling plate acts as a compact intermediary solution that achieves uniform flow speed distribution without requiring extended space between the hollow filter and outlet. By controlling the flow through its opening, it maintains uniformity in a compact configuration, allowing the filter case to remain small and flexible for vehicle mounting
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 decreases non-uniformity in flow speed distribution, enhances trap efficiency by preventing fuel residue discharge, and provides layout flexibility for vehicle mounting by stabilizing gas flow and allowing directional freedom of the outlet.
Implementation Method 1
a hollow filter that is also cylindrical and provided inside the filter case... gas flowing in from the inlet passes the inside of the filter case, passes through the hollow filter
Implementation Method 2
providing a flow controlling plate that controls a flow of gas flowing into the inlet as a filter device for gas that extends life of the hollow filter by efficiently contacting gas flowing into the filter case to the hollow filter, and by separating impurities
Data Source
AI summary
There is provided a filter device for gas including: a cylindrical filter case formed to be airtight; a hollow filter which is formed with an opening in a bottom part thereof, a top part of which is obstructed, and which is placed inside the filter case in such a manner that a central axis thereof substantially aligns with a central axis of the filter case; and a flow controlling plate which is attached roundly between an outlet in the top part of the filter case and the top part of the hollow filter on an inner peripheral wall of the filter case, wherein gas introduced through an inlet in a bottom part of the filter case is introduced into a hollow part of the hollow filter, and also passes through a space between an outer periphery of the hollow filter and the inner peripheral wall of the filter case, and then is discharged through the outlet.