Fluid Pressure Regulating Device Valve Actuation
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Solution Overview
Problem
Existing fluid pressure regulating devices, such as relief valves, suffer from deteriorated operating characteristics due to the presence of intermediate fluid passages, which can lead to either increased pressure or decreased pressure issues, affecting the valve's ability to regulate fluid effectively.
Innovation Solution
The design incorporates a fluid pressure regulating device with a valve that utilizes elastic and electromagnetic forces, featuring a unique fluid passage structure with communicating parts to manage pressure, including a first and second inflow fluid passage and an outflow fluid passage, where the total opening space of the communicating parts is set to be significantly larger than the valve seat, ensuring optimal operating characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an inflow chamber is formed on the upstream side of the valve contact surface by a throttle section, then the valve can be actuated by fuel pressure, but the pressure within the inflow chamber increases and prevents the valve from closing properly, deteriorating operating characteristics
Solution Approach 1:
The patent extracts the harmful intermediate inflow chamber from the system by providing a communication passage that directly connects the fuel inlet to the downstream side of the valve, bypassing the throttled inflow chamber. This removes the source of pressure buildup that prevents proper valve closing, while maintaining the necessary fuel pressure actuation through the spring-loaded valve mechanism.
Solution Approach 2:
The communication passage acts as an intermediary pathway that allows fuel to reach the downstream side of the valve without accumulating pressure in the intermediate inflow chamber. This mediator pathway resolves the contradiction by providing a route for fuel flow that avoids the harmful pressure buildup while still enabling valve actuation.
2Reliability
If an outflow chamber is formed on the downstream side of the valve contact surface by a throttle section, then the valve can regulate pressure, but the pressure within the outflow chamber increases and prevents the valve from opening properly, deteriorating operating characteristics
Solution Approach 1:
The patent removes the harmful effect of the outflow chamber pressure buildup by providing a communication passage that allows fuel to bypass the outflow chamber and reach the fuel outlet directly. This extraction of the problematic intermediate chamber eliminates the backpressure that prevents proper valve opening, while maintaining pressure regulation through the valve's interaction with the spring force.
3Measurement precision
If intermediate fluid passages with throttle sections are provided, then the valve can respond to pressure changes, but the operating characteristic of the valve is deteriorated due to pressure accumulation in the intermediate chamber
Solution Approach 1:
The patent extracts the harmful intermediate chamber that causes pressure accumulation from the system by providing a communication passage that bypasses it. This removes the source of operating characteristic deterioration while preserving the valve's ability to respond to pressure changes through the spring-loaded mechanism and direct fuel inlet connection.
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 effectively prevents pressure increases within the fluid passages, enhancing the valve's operating characteristic by ensuring accurate pressure regulation and maintaining desirable performance even under varying fluid pressures.
Implementation Method 1
an elastic force generating member that generates an elastic force that moves the valve in a direction in which the valve head contacts the valve seat
Data Source
AI summary
A body 20 has body wall surfaces 21, 22 defining a body space inside. A core 30 is disposed within the body 20. The core 30 has a core wall surface defining a core space inside which has a bottom having an opening 33a. A valve 50 is inserted through the opening 33a of the core 30 with a clearance and can move along the core wall surface of the core 30. The valve 50 has a hole with a bottom which is comprised of holes 52a, 53a, 57a, a contact surface 58 that contacts the core wall surface of the core 30, a valve head 59 that can contact a valve seat 40, at least one first communication hole 55 that provides communication between the hole 53a and a second inflow fuel passage 30a within the core space, and at least one second communication hole 54 that provides communication between the hole 52a and the first inflow fuel passage 21a, 22a within the body space.