Vehicle Vent Structure With Drain Path for Splash Ingress Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional vehicle vent tubes face challenges in preventing water and debris ingress while allowing efficient airflow, particularly due to splashing conditions that can lead to undesirable water ingress.
Innovation Solution
A vent device with a main body and cap configuration that includes a central tube, outer wall, and a cap with a deflector surface, which defines a vent chamber and drain passage to separate airflow from liquid ingress, utilizing barbs for hose retention and angled drain outlets to facilitate efficient airflow and liquid drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plug is used in the end of the vent tube to permit airflow, then airflow is enabled, but water and debris can still ingress due to splashing
Solution Approach 1:
The vent system is segmented into distinct functional zones: a vent passage for airflow, a drain passage for liquid drainage, and a sealed chamber. This segmentation allows air to flow through the vent passage while liquids are directed to the drain passage, preventing water ingress into the component while maintaining airflow efficiency
Solution Approach 2:
The vent plug acts as an intermediary element with a specific geometry that mediates between airflow requirements and water protection. The plug creates a sealed chamber that directs liquids away from the vent opening while allowing air to pass through, serving as a mediator that satisfies both conflicting requirements
2Reliability
If the vent tube is open to allow airflow, then pressure ventilation is achieved, but water can splash into the vent tube
Solution Approach 1:
The invention adds a vertical dimension to the vent plug geometry, creating an angled surface that redirects splashing water away from the vent opening. By extending the plug at an angle, the system utilizes the vertical dimension to deflect liquids while maintaining the horizontal airflow path, thereby achieving pressure ventilation without water ingress
3Object-affected harmful factors
If a sealed vent plug is used to prevent water ingress, then water protection is improved, but airflow efficiency is reduced
Solution Approach 1:
The vent plug exhibits local quality variations with different surface properties and geometries in different regions. The angled portion provides water deflection and sealing, while the vent passage portion maintains open airflow. This localized differentiation of functional qualities allows the single component to simultaneously achieve water protection and airflow 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
Effectively inhibits water and debris ingress while maintaining efficient airflow, addressing the limitations of traditional vent tubes by utilizing a design that separates airflow and liquid paths through the use of a vent chamber and drain passage.
Implementation Method 1
The cap includes a vent deflector that has a deflector surface that faces toward the outlet of the main vent passage, wherein, with increased radial distance from the central axis, the deflector surface extends further in an axial direction toward the outlet of the main vent passage
Implementation Method 2
each drain outlet of the at least one drain outlets is angled downward and radially outward
Data Source
AI summary
A vent device for a vehicle component includes a main body and a cap. The main body includes a central tube and an outer wall. The central tube defines a main vent passage about a central axis. The outer wall is disposed about the tube and cooperates therewith to define a drain passage. The main body defines an outlet of the drain passage open to an exterior. The cap cooperates with the top of the main body to define a vent chamber. The cap and a top portion of the central tube cooperate to define an upper vent passage in fluid communication with the vent chamber, the drain passage, and an outlet of the main vent passage. A bottom portion of the cap at least partially defines a vent outlet radially outward of the drain passage and open to the vent chamber and an exterior of the vent device.