Electromagnetic Valve Core Structure for Smooth Axial Alignment
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Solution Overview
Problem
Conventional electromagnetic valves experience difficulties in maintaining the axial alignment of the valve element, leading to reduced smoothness in movement due to the plunger's contact with the valve element's elastic body portion, which affects the valve's ability to efficiently switch fluid flow.
Innovation Solution
The electromagnetic valve design incorporates a solenoid with a tubular bobbin, a movable plunger, and a coil generating magnetic force, along with a flow path member and valve element housing, where the valve element includes a core member and a valve part that opens and closes the relay flow path, ensuring stable and smooth movement of the valve element along the axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the plunger contacts the end surface of the valve element in a columnar shape to press the valve element, then the valve element can be actuated, but the valve element is pressed at its portion far away from the elastic body portion, causing the axis of the valve element to be displaced and reducing smooth movement
Solution Approach 1:
A core member is introduced as an intermediary component between the plunger and the valve element. The core member receives the pressing force from the plunger and transmits it to the valve element at a location closer to the elastic body portion, preventing direct contact between the plunger and valve element. This intermediary structure maintains axial alignment and enables smooth movement of the valve element.
Solution Approach 2:
The pressing mechanism is segmented into multiple components: the plunger, the core member, and the valve element. By dividing the force transmission path into separate segments, the system allows for optimized contact points - the plunger contacts the core member at one location while the core member contacts the valve element at a different location closer to the elastic body portion, resolving the alignment issue.
2Force
If the valve element is pressed at a location far from the elastic body portion, then the plunger can apply sufficient force, but the attitude of the valve element cannot be maintained, causing axis displacement
Solution Approach 1:
The core member serves as a mediator that decouples the force application point from the valve element's elastic body portion. It allows the plunger to apply force while the core member's geometry and contact points ensure the valve element maintains its correct attitude and axial alignment during actuation.
Solution Approach 2:
Different parts of the valve element are designed with different functions: the elastic body portion is optimized for sealing and flow control, while a separate contact region is designed to receive force from the core member. This local differentiation allows force application without compromising the attitude stability of the elastic body portion.
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 enhances the stability and smooth operation of the valve element, allowing for efficient switching between open and closed states, thereby improving the valve's performance in managing fluid flow, particularly in internal combustion engine applications.
Implementation Method 1
a coil wound around an outer peripheral portion of the bobbin and generating a magnetic force with energization to move the plunger in the axial direction
Data Source
AI summary
An electromagnetic valve includes: a solenoid having a plunger movably supported along an axial direction; a flow path member having a fluid passage flow path and a valve element housing portion; and a valve element disposed in the valve element housing portion and movable along the axial direction together with the plunger. The valve element includes: a body part in a tubular shape having a wall portion closing one axial end side and an opening at the other axial side; a valve part fixed to one axial side of the wall portion for opening and closing the flow path as moving together with the plunger; and a core member in a columnar shape that is movable along the axial direction inside the body part, and that is in contact with the wall portion on the one axial side and the plunger on the other axial side.