Bleed Valve Assembly Segmentation for Coolant Accessibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bleed valve assemblies for engines face challenges in accessing coolant for maintenance due to restrictive packaging, which can lead to suboptimal positioning of the boss for bleeding coolant, potentially resulting in reduced accessibility and increased risk of air entrapment in the cooling system.
Innovation Solution
A bleed valve assembly comprising a fastener with a threaded shank and a bleed bore, and a bleed plug with a threaded portion and a side port, allowing fluid to bypass the threaded portion during bleeding, maintaining clamping force and reducing contamination risks, while the radial protrusion modulates flow rates and retains seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a boss is provided on the cylinder head with a bore for bleeding coolant, then coolant can be bled from the engine, but packaging requirements may prevent optimal positioning of the boss for service access
Solution Approach 1:
The bleed valve assembly is segmented into separate functional components: a fastener portion that integrates with the engine's existing boss structure, and a bleed plug portion that provides the bleeding function. This segmentation allows the boss to be positioned for optimal packaging while the bleed plug can be accessed separately for maintenance.
Solution Approach 2:
The fastener is designed to serve multiple functions: it provides structural fastening of the boss to the engine block, maintains sealing integrity through its clamping force, and enables coolant bleeding through the integrated bleed bore and plug mechanism. This multi-functionality eliminates the need for separate dedicated bleeding structures.
2Productivity
If fluid passes through the threaded portion of the bleed plug during bleeding, then the bleeding function is achieved, but contamination risk increases
Solution Approach 1:
The harmful effect of contamination is addressed by extracting the threaded portion from the fluid flow path. The bleed bore is positioned and configured so that coolant flows through a dedicated passage that bypasses the threaded engagement area, thereby eliminating the risk of contaminating the threading mechanism while maintaining effective bleeding functionality.
3Reliability
If the bleed plug is opened to release coolant, then air can be bled from the cooling system, but clamping force of the fastener may be reduced
Solution Approach 1:
The assembly is segmented into a fastener portion and a bleed plug portion, allowing independent operation. The bleed plug can be rotated or removed to open the bleed bore for air removal, while the fastener's clamping function remains separate and unaffected, maintaining sealing integrity throughout the bleeding process.
4Volume of moving object
If the boss is positioned for optimal packaging, then space utilization is improved, but accessibility for maintenance may be reduced
Solution Approach 1:
By segmenting the bleed valve into a permanently installed fastener portion and a removable/servicable bleed plug portion, the system allows the boss to be positioned optimally for packaging within the engine bay, while the bleed plug can be independently accessed and removed for maintenance operations without requiring access to the boss location.
Data Source
AI summary
Methods and systems are provided for a bleed valve assembly for an engine. In one example, a method (or system) may include a fastener comprising a threaded shank received within a bore of the engine, a bleed bore within the fastener, and a bleed plug including a threaded portion received within the bleed bore of the fastener. The bleed plug may include an internal passage extending from one end of the bleed plug and a side port in fluidic communication with the passage so that when the bleed plug is in an open position fluid from an engine fluid chamber may flow through the passage of the bleed plug and out of the port.