Air Box Dual Suction Channels Oscillating Dust Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hand-held motor devices driven by internal combustion engines face excessive wear due to abrasive dust, which existing air filtration systems partially address but at the cost of reduced engine performance and increased installation space.
Innovation Solution
An air box system with two suction openings and a unique configuration of suction pipes creates a partial backflow of intake air, reducing dust deposition on the air filter by utilizing an oscillatory system that reverses airflow temporarily, thereby pre-separating dust before it reaches the filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air filter is provided to clean the combustion air, then the wear of engine parts is reduced, but the flow resistance increases and engine performance decreases
Solution Approach 1:
The air filter is positioned downstream in the airflow path, allowing the engine to first draw in air through the oscillating suction openings which create a dust-blown effect before the air reaches the filter. This preliminary action of the oscillating airflow reduces dust deposition on the filter before filtration occurs, maintaining lower flow resistance while still protecting the engine.
2Reliability
If an air filter is provided to clean the combustion air, then the wear of engine parts is reduced, but the installation space required increases
Solution Approach 1:
The oscillating suction opening assembly is integrated into the air box structure, combining the dust-reducing oscillating airflow mechanism with the air filtration system. This merging allows the two functions (dust reduction and filtration) to work together in a compact arrangement, reducing the overall installation space compared to separate systems.
3Reliability
If a cyclone separator is provided upstream of the air filter, then coarse particles are removed, but the installation space increases
Solution Approach 1:
The complex cyclone separator assembly is extracted and replaced with a simpler oscillating suction opening mechanism that achieves dust separation through airflow oscillation rather than centrifugal force. This extraction of the cyclone separator function and replacement with a simpler mechanism reduces installation space while maintaining separation efficiency.
4Reliability
If the air filter capacity is increased, then the separation efficiency is improved, but the installation space required increases
Solution Approach 1:
The oscillating airflow from the suction openings performs a preliminary dust-reducing action before the air enters the filter. This preliminary action reduces the dust load on the filter, allowing a smaller filter capacity to achieve the same overall separation efficiency, thereby reducing installation space requirements.
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
This configuration results in a 20% reduction in dust accumulation on the air filter, allowing for improved engine performance and reduced wear while maintaining space efficiency, with adjustable design for specific applications.
Implementation Method 1
an oscillatory system consisting of a plurality of partial volumes... This means that two suction pipes exist between the suction openings and the actual housing of the air box... A first volume is the housing of the air box. An optional second partial volume is the volume of the first suction pipe and a third optional partial volume is the volume of the second suction pipe.
Implementation Method 2
an interaction occurs between the first suction opening and the second claimed suction opening when operating the internal combustion engine, which causes a partial backflow of the intake air through the suction openings, at least temporarily. This means that the flow direction of the drawn in combustion air is reversed temporarily.
Data Source
AI summary
The present disclosure relates to an air box for an internal combustion engine, including a housing, having two suction openings as well as an outlet.