Ejector Device Simplified Design for Oil Mist Suction
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Solution Overview
Problem
Existing ejector devices are complex, costly, and require significant assembly effort, limiting their widespread use for applications like oil mist suction in internal combustion engines.
Innovation Solution
A simplified ejector device design featuring a base body with a suction chamber and mixing channel, both produced as single plastic injection molded components, connected via a flange area and equipped with a fastening device for easy assembly, utilizing a propellant nozzle to generate negative pressure for efficient suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional ejector devices are used, then suction function is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The suction chamber and mixing channel are merged into a single integrated base body component manufactured by plastic injection molding. This eliminates the need for separate components and complex assembly operations while maintaining the functional integrity of the suction system.
Solution Approach 2:
The base body serves multiple functions simultaneously: it forms the suction chamber, creates the mixing channel, provides structural support, and enables assembly with the housing. This multi-functionality reduces the total number of components needed in the ejector device.
2Ease of manufacture
If multiple separate components are used, then manufacturing flexibility is improved, but assembly effort increases
Solution Approach 1:
The suction chamber and mixing channel are combined into one injection-molded base body, eliminating multiple assembly steps. The single-component design maintains manufacturing efficiency through standardized plastic injection molding while dramatically reducing assembly complexity.
Solution Approach 2:
The ejector device is segmented into two main assemblies: the base body (containing suction chamber and mixing channel) and the housing. This segmentation allows each to be manufactured optimally and assembled through a simple, standardized connection interface.
3Reliability
If conventional design is used, then functional requirements are met, but production cost increases
Solution Approach 1:
Combining the suction chamber and mixing channel into a single injection-molded part eliminates the need for separate manufacturing processes, tooling, and quality control for multiple components. This significantly reduces production costs while maintaining suction performance through optimized internal geometry.
Solution Approach 2:
The design utilizes plastic injection molding parameters (material selection, mold design, cooling channels) to optimize both cost and performance. The material properties and geometric parameters are specifically selected to achieve the required suction characteristics at low manufacturing cost.
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 design enables cost-effective, easy assembly, and efficient suction of gas containing oil mist, suitable for use in internal combustion engines, with improved production efficiency and reduced operational complexity.
Implementation Method 1
a propellant nozzle device (108) for generating a propellant jet directed along a jet direction out of the suction chamber (104) and into the mixing channel (106)
Implementation Method 2
utilizing a propellant nozzle to generate negative pressure for efficient suction
Implementation Method 3
a mixing channel (106) for mixing a propellant medium with the suction medium
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
The invention relates to an ejector device which has a simple design, is economical to produce and is easy to construct. According to the invention, the injector device comprises: a suction chamber for suctioning a suction medium; a mixing channel for mixing a propulsion medium with the suction medium; a propulsion nozzle device for generating a propulsion medium beam directed in a beam direction out from the suction chamber and into the mixing channel.