Segmented Venting Plug for Engine Coolant Refilling
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Solution Overview
Problem
Conventional methods for venting air from coolant systems during refilling procedures are inefficient, leading to trapped air that can cause hot spots and cracks in engine components, necessitating a more reliable and faster process for air venting.
Innovation Solution
A venting plug assembly comprising an outer sealing element with an annular portion and an inner sealing element that moves relative to the outer element to allow air to vent from coolant channels, ensuring effective sealing and air release during coolant refilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional radiator caps are used during coolant refilling, then the filling process can be performed, but air becomes trapped in the coolant channels causing hot spots and cracks
Solution Approach 1:
The venting plug assembly is divided into two separate sealing elements (outer and inner) that work independently. The outer sealing element seals the external interface while the inner sealing element seals the interface between the plug and coolant channel. This segmentation allows each element to perform its specific function effectively, enabling rapid refilling while preventing air entrapment that would compromise component integrity.
Solution Approach 2:
The venting plug assembly acts as an intermediary device between the coolant refilling process and the sealed coolant system. It provides a controlled interface that allows coolant to enter rapidly while simultaneously providing a venting pathway for air to escape, thus mediating between the need for fast refilling and the need to prevent air-related damage to engine components.
2Reliability
If conventional sealing methods are used, then coolant channels are sealed, but air venting is ineffective leading to trapped air
Solution Approach 1:
The sealing function is segmented into two distinct elements: the outer sealing element that handles external sealing and the inner sealing element that handles internal sealing at the coolant channel interface. This segmentation improves air venting effectiveness by creating separate functional zones, while the modular nature of the segmented design actually simplifies manufacturing and assembly compared to a single complex sealing structure.
3Ease of operation
If freeze plugs are used to seal coolant channels, then channels are sealed, but air cannot vent during refilling
Solution Approach 1:
The venting plug assembly incorporates a dynamic venting mechanism where the inner sealing element can be selectively positioned to allow air to escape during refilling while maintaining the seal. This dynamic capability transforms the static freeze plug into an active venting system, making the refilling process easier and safer by automatically preventing air entrapment without requiring complex manual operations.
Solution Approach 2:
The venting plug assembly serves as an intermediary between the simple freeze plug seal and the complex refilling operation. It maintains the simplicity of a plug-based sealing system while introducing controlled venting capability, thus mediating between ease of operation and prevention of harmful air entrapment during coolant refilling.
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 venting plug assembly enables rapid and efficient coolant refilling while preventing air entrapment, reducing the risk of component damage and improving engine reliability by ensuring proper air venting from coolant channels.
Implementation Method 1
The inner sealing element is configured to move relative to the annular portion of the outer sealing element to allow air to vent from the coolant channel through the outer sealing element
Implementation Method 2
The sand is typically positioned inside or as part of a mold that is used to cast the engine components. These components are subsequently manufactured by pouring molten iron or aluminum into the mold. Once the casting is cooled, the sand is typically removed. For example, sand may be removed through the holes in the engine block, leaving channels that the coolant flows through. The holes may be manufactured for other reasons as well. These holes are then plugged or sealed using freeze plugs, also known as cup plugs. Freeze plugs commonly have a shallow cup with walls that are slightly tapered so that the cup may be press fitted into the hole and held therein by friction.
Data Source
AI summary
A venting plug assembly for sealing a coolant channel and venting air therefrom is disclosed. The coolant channel defines an open portion to receive the venting plug assembly. The venting plug assembly includes an outer sealing element with an annular portion configured for sealing engagement with the open portion of the coolant channel. The venting assembly further includes an inner sealing element configured for sealing engagement with the annular portion of the outer sealing element. The inner sealing element is configured to move relative to the annular portion of the outer sealing element to allow air to vent from the coolant channel through the outer sealing element.