Flow Accelerating Head Cover for Engine Blow-by Gas Separation
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Solution Overview
Problem
The existing impact type ventilation structure in internal combustion engines has low oil separation efficiency, leading to increased engine oil consumption and frequent oil replenishment due to its reliance on impact alone for oil particle removal.
Innovation Solution
A flow accelerating ventilation type head cover is introduced, incorporating a baffle, impact guide, impact rib, and flow accelerating member to enhance oil separation efficiency by combining impact and collision effects, with the flow accelerating member comprising a nozzle and wire mesh media to accelerate gas flow and separate oil particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If impact type ventilation structure is used, then structure is simple, but oil separation efficiency is low
Solution Approach 1:
The ventilation structure is divided into multiple functional segments: impact guide (first space), baffle (second space), impact rib (third space), and flow accelerating member with wire mesh (fourth space). Each segment performs a specific oil separation function, transforming a single impact mechanism into a multi-stage separation process that significantly improves oil separation efficiency while maintaining reasonable structural complexity.
Solution Approach 2:
The invention adds a flow acceleration dimension by introducing a nozzle that accelerates blow-by gas before it impacts the wire mesh. This velocity dimension enhancement transforms the separation mechanism from static impact to dynamic collision, dramatically improving oil particle removal efficiency without substantially increasing structural complexity.
2Loss of substance
If impact type ventilation structure is used, then manufacturing cost is low, but engine oil consumption is high
Solution Approach 1:
The multi-stage ventilation structure efficiently recovers oil particles from blow-by gas that would otherwise be lost. By implementing four sequential separation stages (impact guide, baffle, impact rib, flow accelerating member), the system maximizes oil particle capture and returns oil to the oil pan, significantly reducing engine oil consumption despite increased manufacturing complexity.
3Reliability
If flow accelerating member is added, then oil separation efficiency is high, but device complexity increases
Solution Approach 1:
The flow accelerating member serves multiple functions simultaneously: it accelerates blow-by gas flow through the nozzle, directs the accelerated flow onto the wire mesh for enhanced collision separation, and structures the fourth space to optimize the separation process. This multi-functionality achieves high oil separation efficiency while minimizing the number of separate components needed.
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 significantly increases oil separation efficiency, reducing engine oil consumption, improving ventilation structure performance, maintaining production costs, and enhancing combustion performance by effectively recycling engine oil, while also reducing harmful emissions.
Implementation Method 1
an impact guide being coupled with the baffle passage and being positioned in the lower space to separate the oil particle by impact effect of impacting thereon
Implementation Method 2
an impact rib protruded to the upper space to separate the oil particle by impact effect of impacting thereon
Implementation Method 3
a flow accelerating member being coupled with the baffle passage and being positioned in the upper space to accelerate a flow speed of the blow-by gas passing through the baffle passage and thus separate the oil particle by collision effect of impacting the oil particle with each other
Data Source
AI summary
A flow accelerating ventilation type head cover may include a baffle separating a lower space which is opened such that blow-by gas containing an oil particle generated from an engine is collected thereto and an upper space which is closed such that the blow-by gas is flowed out to an outside of the engine and having a baffle passage communicating the lower space with the upper space such that the blow-by gas is exhausted from the lower space to the upper space therethrough, and a flow accelerating member being coupled with the baffle passage and being positioned in the upper space so as to accelerate a flow speed of the blow-by gas passing through the baffle passage and thus separate the oil particle by collision effect of impacting the oil particle with each other in the upper space.