Adhesive Intermediate Layer for Magnet Core Support
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Solution Overview
Problem
Existing electromagnetically actuable inlet valves for high-pressure pumps in fuel injection systems face issues with high loads on the magnet armature and magnet core, leading to potential damage and impaired functionality due to insufficient support from elastic coatings, and require complex and material-intensive encapsulation methods.
Innovation Solution
The introduction of an intermediate layer made of adhesive, which hardens after the magnetic core is inserted, provides secure support to the magnet core, reducing the load on the connection between the carrier element and the magnet core, and uses a minimal amount of material by applying it only on the side facing away from the magnet armature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnet armature is allowed to strike the magnet core directly, then the electromagnetic actuator can be simpler in structure, but the connection between the carrier element and the magnet core is subjected to high loads that can lead to damage over time
Solution Approach 1:
The patent introduces an intermediate layer made of adhesive material between the magnet core and the carrier element. This intermediate layer acts as a mediator that absorbs the impact forces when the magnet armature strikes the magnet core, preventing direct transmission of high loads to the connection between the carrier element and magnet core, thereby maintaining reliability while keeping the structure simple
2Strength
If an elastic coating is applied to the magnet core to provide support, then the load on the connection can be reduced, but the coating may not provide sufficient support and the process becomes more complex
Solution Approach 1:
The patent changes the parameters of the adhesive material used in the intermediate layer, specifically selecting materials with appropriate hardness and bonding properties. The adhesive is applied in a soft state and then hardened to provide the necessary support for the magnet core, achieving both sufficient strength and ease of manufacture through proper material selection and processing
3Stability of the object's composition
If the magnetic core is encapsulated in synthetic resin material to fix it, then the magnetic core and coil are securely fixed, but a large amount of material is required and the process becomes complex
Solution Approach 1:
The patent applies the adhesive intermediate layer only in specific locations where needed - between the magnet core and the carrier element - rather than encapsulating the entire magnetic core and coil assembly in synthetic resin. This localized application provides the necessary fixing and stability while minimizing the quantity of material required and simplifying the manufacturing process
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 solution effectively reduces the load on the connection between the carrier element and the magnet core during operation, enhancing the durability and reliability of the inlet valve while minimizing material usage and simplifying the manufacturing process.
Implementation Method 1
The electromagnetic actuator has a magnet armature that acts at least indirectly on the valve member, a magnet coil that surrounds the magnet armature, and a magnet core. When the magnet coil is energized, the magnet armature can be moved against the force of a restoring spring
Implementation Method 2
The magnetic core is supported at least on its side facing away from the magnet armature via an intermediate layer (96) made of adhesive, which hardens after the introduction of the magnetic core
Data Source
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AI summary
The invention proposes an electromagnetically operable inlet valve (24) for a high-pressure pump, in particular of a fuel-injection system. The inlet valve (24) has a valve member (34) which can be moved between an open position and a closed position. An electromagnetic actuator (60) is provided, it being possible for the valve member (34) to be moved by said electromagnetic actuator, wherein the electromagnetic actuator (60) has a magnet armature (68) which acts at least indirectly on the valve member (34), a magnet coil (64) which surrounds the magnet armature (68), and a magnet core (66) against which the magnet armature (68) comes to rest at least indirectly when current is applied to the magnet coil (64), wherein the magnet armature (68) is displaceably routed in a carrier element (78), and wherein the carrier element (78) and the magnet core (66) are connected to one another. The magnet core (66) is at least partially surrounded by a housing body (70), and the magnet core (66) is supported, at least on its side which is averted from the magnet armature (68), by means of an intermediate layer (96) in the housing body (70).