Electromagnetic Valve Spring Support on Sleeve
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Solution Overview
Problem
Existing electromagnetically operable valves for motor vehicles face challenges in designing the core end face to optimize magnetic force flow due to the presence of the Woodruff key, which complicates assembly and can affect the valve's operational efficiency.
Innovation Solution
The spring element is supported on the sleeve instead of the magnetic core, with an axial stop on the sleeve providing a secure and frictional support, allowing for a freely designed core end face and improved magnetic flux, and additional features like diameter reduction, beads, and stiffening elements enhance the sleeve's rigidity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spring element is supported on the magnetic core, then the magnetic core can provide a stable support point, but the core end face design is restricted by the Woodruff key contact point
Solution Approach 1:
The patent introduces the sleeve as an intermediary component between the spring element and the magnetic core. The sleeve's axial stop provides the support surface for the spring element, while the magnetic core remains free from direct spring contact. This mediator allows the core end face to be optimized for magnetic flux without compromise from Woodruff key constraints, while the sleeve ensures reliable spring support through its dedicated axial stop feature.
2Ease of manufacture
If the Woodruff key is pressed into the sleeve with elastic and/or plastic deformation, then assembly is simplified, but the sleeve material and structure must accommodate high insertion forces
Solution Approach 1:
The Woodruff key is pre-deformed elastically and/or plastically before insertion into the sleeve. This preliminary action allows the key to be pressed into the sleeve with sufficient force to create a frictional or non-positive connection without requiring complex assembly mechanisms. The pre-deformation ensures proper fit and secure mounting while simplifying the overall assembly process.
3Reliability
If the sleeve has a diameter reduction to form an axial stop, then the spring element is securely supported, but the sleeve structure becomes more complex
Solution Approach 1:
The sleeve is segmented into distinct functional zones: a first section with a larger diameter that provides the axial stop for spring element support, and a second section with a smaller diameter that accommodates the magnetic core. This segmentation allows the axial stop to be formed through a simple diameter reduction rather than adding separate components, maintaining structural efficiency while ensuring reliable spring element positioning.
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 simplifies assembly, ensures reliable high-force transmission, and maintains the valve's performance over its service life by providing a secure support for the spring element without detaching, while optimizing magnetic flux and reducing manufacturing costs.
Implementation Method 1
a magnet armature (4) that actuates a valve element (6) is arranged in an axially displaceable manner in the sleeve (2)... when the magnet armature is attracted by the magnet core, it detaches from the valve opening and thereby opens it
Implementation Method 2
Two spring elements act between the magnet armature and the magnet core, which essentially serve to reset the magnet armature... One of the spring elements is designed as a disc spring that acts on the armature end face of the magnet armature with a spring force
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an electromagnetically actuable valve (1), in particular for motor vehicles, having a sleeve (2) in which a magnet core (3) is arranged fixedly and in which a magnet armature (4) which actuates a valve element (6) is arranged in an axially displaceable manner, wherein at least one spring element (13) is provided which, at least during an actuation of the valve (1), exerts a spring force on that armature end surface (12) of the magnet armature (4) which faces toward the magnet core (3). It is provided here that the spring element (13) is supported on the sleeve (2).