Solenoid Valve Guide Member Fluid Biasing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic valves controlling high-pressure hydrogen gas in fuel cell cars require increased radial thickness of the guide member to withstand tensile forces, leading to a larger valve size.
Innovation Solution
The guide member is not fixed to the valve main body, and is biased by fluid pressure, with a stopper portion and abutment portion configurations that allow the guide member and fixed iron core to be biased in the same direction, reducing tensile forces and enabling a smaller valve design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the guide member is fixed to the valve main body with screws, then the structural strength is improved, but the radial thickness of the guide member must be increased to withstand tensile forces from high-pressure hydrogen gas, resulting in a larger valve size
Solution Approach 1:
The guide member is extracted from the fixed connection system and made movable within the insertion hole. By removing the fixed connection (screws), the guide member can move axially in response to fluid pressure without transmitting tensile forces to the valve main body, thereby eliminating the need for increased radial thickness to withstand such forces.
Solution Approach 2:
The guide member transitions from a static fixed position to a dynamic movable position within the insertion hole. The guide member is allowed to move axially in response to fluid pressure changes, with its movement constrained by stopper portions. This dynamic configuration allows the system to adapt to pressure variations without requiring the guide member to be statically strong against tensile forces.
2Force
If the guide member is made movable and biased by fluid pressure, then the tensile force on the guide member is reduced, but additional components (stopper portion, abutment portion) are required
Solution Approach 1:
The stopper portion serves multiple functions: it limits the axial movement of the guide member, provides a reference position for the guide member, and works with the abutment portion to establish the biasing mechanism. By making this single component multi-functional, the patent reduces the need for additional separate parts while achieving the desired force reduction effect.
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 suppresses the increase in radial thickness and size of the guide member, even at higher pressures, allowing for a more compact electromagnetic valve design.
Implementation Method 1
a movable iron core that separates the valve body from the valve seat to thereby communicate the inlet with the outlet; and a fixed iron core that attracts the movable iron core by energization of a coil
Implementation Method 2
The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by a pressure of the fluid
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.