Electromagnetic Valve Adjustment Sleeve for Residual Air Gap
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Solution Overview
Problem
Existing electromagnetic valves for slip-controlled motor vehicle brake systems face challenges in achieving simple and precise adjustment of the residual air gap between the magnet armature and the magnet core, with existing solutions being costly and prone to magnetic leakage or sticking.
Innovation Solution
An electromagnetic valve design featuring a non-magnetic adjustment sleeve with a collar for precise centering, which allows for stepless adjustment of the residual air gap through a sliding press fit, decoupling the valve tappet from magnetic influences and ensuring secure attachment within the valve housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional adjustment mechanism is used for the residual air gap, then adjustment precision can be achieved, but the device complexity and cost increase
Solution Approach 1:
The adjustment mechanism is segmented into a modular assembly consisting of the magnet armature, adjusting sleeve, and valve tappet as separate but coordinated components. This segmentation allows each component to be optimized independently while simplifying the overall adjustment mechanism, resolving the contradiction between precision and complexity.
Solution Approach 2:
The adjusting sleeve acts as an intermediary component between the magnet armature and the valve tappet, providing a simple yet effective means of adjustment. This intermediary element enables precise residual air gap adjustment without requiring complex mechanisms, directly resolving the technical contradiction.
2Strength
If magnetic materials are used in the adjustment mechanism, then structural integrity is maintained, but magnetic leakage and sticking occur
Solution Approach 1:
The harmful magnetic properties are extracted from the adjusting sleeve by selecting non-magnetic materials for this specific component. This allows the adjustment mechanism to maintain structural integrity while eliminating magnetic leakage and sticking, as the non-magnetic sleeve isolates the magnetic fields from the adjustment mechanism.
Solution Approach 2:
Different materials with appropriate magnetic properties are assigned to different components: magnetic materials are used where magnetic functionality is required (magnet armature, magnet core), while non-magnetic materials are used where magnetic interference must be avoided (adjusting sleeve). This local differentiation of material properties resolves the contradiction between structural integrity and magnetic interference prevention.
3Power
If the valve tappet is directly exposed to magnetic fields, then electromagnetic actuation is efficient, but unwanted magnetization occurs
Solution Approach 1:
The non-magnetic adjusting sleeve serves as an intermediary barrier between the magnetic field source (magnet armature) and the valve tappet. This intermediary protects the valve tappet from unwanted magnetization while allowing the electromagnetic actuation to remain efficient, as the magnetic field can still act on the magnet armature which then mechanically actuates the valve tappet.
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
Enables cost-effective, precise adjustment and minimizes magnetic leakage, maintaining wear-free operation and preventing unwanted magnetization, thus enhancing the reliability and efficiency of the valve control.
Implementation Method 1
an electromagnetic valve, in particular for slip-controlled motor vehicle brake systems... can be opened by means of a magnet coil
Implementation Method 2
a return spring 8 or can be opened by means of a magnet coil... with the return spring 8 being supported
Data Source
Figure 1
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AI summary
The invention relates to an electromagnetic valve, comprising a valve tappet (4), which is arranged in a valve housing (14) and which can open or close a valve passage (13) in the valve housing (14), a magnet armature (2), which is provided in order to actuate the valve tappet (4) and through which a hole (1) passes for accommodating the valve tappet (4), and a restoring spring (8), which acts on the valve tappet (4) and the spring end of which facing away from the magnet armature (5) is supported on a magnet core (5) in the valve housing (14). For precise valve adjustment, an adjustment sleeve (3) is fixed in the hole (1) of the magnet armature (2), in which adjustment sleeve the valve tappet (4) is fastened in some sections at the same time.