Electromagnet Valve Guide Pin Segmentation for Magnetic Force Linearity
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Solution Overview
Problem
Existing electromagnetic valves in internal combustion engines face challenges in achieving the greatest possible magnetic force in the smallest installation space with linear magnetic force progression over a large adjustment range for precise control.
Innovation Solution
The guide pin is designed with a magnetizable section and a non-magnetizable section, forming a control edge that enhances magnetic field line transition, allowing for increased magnetic force and improved linearity, and can be adjusted for fine-tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the guide pin is made entirely of magnetizable material, then the magnetic force is increased, but the magnetic force progression becomes non-linear over the valve lift path
Solution Approach 1:
The guide pin is divided into two distinct sections: a first magnetizable section and a second non-magnetizable section. This segmentation allows each section to serve a specific function - the magnetizable section enhances magnetic force while the non-magnetizable section ensures linear magnetic force progression over the valve lift path, resolving the contradiction between force magnitude and force linearity.
Solution Approach 2:
Different sections of the guide pin are assigned different magnetic properties tailored to their specific functional requirements. The first section has magnetizable material properties to concentrate and enhance magnetic flux, while the second section has non-magnetizable material properties to provide a controlled, linear magnetic force progression. This local differentiation of material properties resolves the contradiction.
2Volume of moving object
If the installation space is reduced, then the valve size is minimized, but the magnetic force magnitude decreases
Solution Approach 1:
The guide pin with its dual-section design is nested within the compact electromagnetic valve assembly, allowing the magnetic circuit components to be efficiently arranged within limited space. The magnetizable section concentrates magnetic flux in a compact configuration, enabling high magnetic force generation within a minimized installation volume.
3Adaptability or versatility
If the magnetic force is increased for precise control, then the adjustment range is extended, but the magnetic force becomes non-linear
Solution Approach 1:
The segmented guide pin structure enables extended adjustment range through the interaction between the magnetizable and non-magnetizable sections. The magnetizable section provides enhanced magnetic force for precise control, while the non-magnetizable section maintains linearity of magnetic force progression, allowing the valve to operate accurately across a wider adjustment range without sacrificing linearity.
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 design significantly increases magnetic force, ensures even magnetic force progression over the valve lift path, and allows for precise control while maintaining compact dimensions, with cost-effective production options.
Implementation Method 1
at least the surface of the guide pin pointing radially outward forms a first part, which is directed towards the core and is designed to be magnetizable
Implementation Method 2
Such an embodiment ensures a significant increase in the magnetic force
Implementation Method 3
the second non-magnetizable part serves as a bearing for the armature
Data Source
Figure 1~2
Figure 3~4
AI summary
An electromagnet valve with an electromagnetic circuit which comprises a coil wound onto a coil former, an armature, a core and a magnetic return device, wherein the armature is substantially hollow and is mounted movably with an inwardly directed face thereof on a guide pin, and at least that surface of the guide pin (12) which points radially outwards forms a first part (13), which is directed towards the core (6) and can be magnetized, and forms a second part (14), which is directed towards the armature (5) and cannot be magnetized, in such a way that a control edge (15) is formed between the first part (13) and the second part (14).