Transmission Vent Valve Plate Chamber Volume Design
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Solution Overview
Problem
Existing ventilation structures for transmission cases struggle to effectively separate and discharge air from oil, often requiring additional components that increase complexity and manufacturing costs, and may allow oil to be ejected or not efficiently manage oil bubbles.
Innovation Solution
A ventilation structure featuring a vent valve with a plate member that separates two chambers within the transmission case, where the introduction chamber has a larger volume than the discharge chamber, preventing oil from entering the discharge path and allowing air to be reliably separated and discharged, while integrating the plate member as part of a seal to simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mesh member is added to vanish oil bubbles, then oil bubble removal is improved, but the number of members increases and manufacturing complexity increases
Solution Approach 1:
The patent combines the mesh member for oil bubble removal with the existing vent valve structure, integrating multiple functions into a single component. The mesh member is positioned within the vent valve assembly to vanish oil bubbles while allowing air passage, eliminating the need for separate oil removal devices and reducing overall structural complexity.
2Reliability
If a labyrinth structure with intermediate wall is used to separate oil and air, then oil ejection prevention is improved, but the cover member becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent divides the vent valve assembly into distinct functional segments: an oil separation chamber with mesh member for oil bubble removal, and an air passage channel for air discharge. This segmentation allows simple structural design for each part while achieving effective oil-air separation, avoiding the need for complex labyrinth structures.
3Productivity
If a breather pipe is installed in breather chamber, then air escape function is improved, but oil may be ejected from the pipe to the outside
Solution Approach 1:
The patent introduces a mesh member as an intermediary element within the breather chamber that acts as a filter between the oil-containing environment and the air escape path. The mesh member allows air to pass through while capturing and vanishing oil bubbles, preventing oil ejection while maintaining air escape efficiency.
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 ensures reliable separation and discharge of air from oil within the transmission case with a reduced number of components and manufacturing steps, enhancing oil discharge performance and preventing oil ejection.
Implementation Method 1
releases air to the outside of the transmission case (1) when internal pressure reaches a predetermined value or more
Implementation Method 2
separating side surfaces of the first chamber (11) and the second chamber (12) from each other using the plate member (31)
Data Source
AI summary
A first chamber for introducing thereinto the air inside a transmission case from an introduction opening, a second chamber for leading out air from a lead-out hole to a vent valve, and a shielding part for shielding the first and second chambers excluding a ventilation opening so that the first chamber is larger than the second chamber in volume are formed adjacent to a plate member in a first case. The introduction opening is formed by separating side surfaces of the first and second chambers using the plate member.