Bypass Valve Barrier Assembly External Port Design
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Solution Overview
Problem
Bypass valves in internal combustion engine cooling systems experience pressure drops and flow restrictions due to the interaction of the movable barrier assembly with the fluid passage ports, which affects the fluid flow and pressure consistency.
Innovation Solution
A bypass valve design with a barrier assembly that moves externally to the fluid passage ports, using a linear thermal actuator and spring mechanism to regulate fluid flow through a bypass port without direct contact, minimizing pressure drops and flow restrictions by maintaining the ports' integrity and reducing viscous forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the barrier assembly directly contacts the fluid passage ports to control flow, then flow regulation is achieved, but pressure drops and flow restrictions occur
Solution Approach 1:
The barrier assembly is extracted from direct contact with the fluid passage ports. Instead of the barrier directly blocking the ports, it is positioned to control a bypass port that is in communication with the main ports. This extraction eliminates the harmful interaction between the barrier and the main fluid flow path, resolving the pressure drop issue while preserving flow regulation capability through the bypass mechanism.
Solution Approach 2:
A bypass port is introduced as an intermediary element between the barrier assembly and the main fluid passage ports. The barrier controls flow through this intermediate bypass path rather than directly blocking the main ports. This intermediary approach allows flow regulation to be achieved without the barrier interfering with the primary fluid flow, thereby minimizing pressure drops.
2Ease of operation
If the barrier assembly is positioned to control fluid flow through ports, then flow control is achieved, but viscous forces increase causing flow restrictions
Solution Approach 1:
The barrier assembly is extracted from the main fluid passage ports where it would create viscous forces and flow restrictions. By positioning the barrier to control only the bypass port, the harmful interaction with the main fluid flow is eliminated, reducing viscous forces and flow restrictions in the primary flow path.
3Ease of operation
If the barrier assembly directly blocks ports to regulate flow, then flow regulation is achieved, but pressure consistency deteriorates
Solution Approach 1:
The bypass port serves as an intermediary that allows the barrier to regulate flow without directly blocking the main ports. This indirect control mechanism maintains pressure consistency in the primary fluid passage while still achieving the desired flow regulation through the bypass path.
Solution Approach 2:
By extracting the barrier from direct contact with the main fluid passage ports, the source of pressure inconsistency is removed. The barrier now only affects the bypass flow, allowing the main ports to maintain consistent pressure while flow regulation is achieved through the bypass mechanism.
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 solution ensures a consistent fluid pressure and increased flow rate through the ports by avoiding direct contact between the barrier assembly and the fluid, reducing pressure drops and flow restrictions, while maintaining compact external dimensions.
Implementation Method 1
using a linear thermal actuator and spring mechanism to regulate fluid flow through a bypass port
Data Source
AI summary
A bypass valve for thermally regulating a fluid flow in two directions by opening and closing a bypass fluid flow between the two directions. An example of application of such a bypass valve is for regulating the flow of engine coolant fluid between a vehicle engine and a heat-exchange system for cooling down the engine coolant. The bypass valve includes a housing inside which a first port, a second port, a bypass port and a barrier assembly are arranged. The barrier assembly is movable with respect to the bypass port, so that it can open or close the port depending on fluid temperature. In addition, the barrier assembly is arranged external to the first and second ports, so that it does not interfere with fluid passing through them. The bypass valve therefore provides substantially constant fluid pressure in the first and second ports, avoiding pressure drops associated with conventional bypass valves.