Fuel Injection Valve Ring Element Alignment and Vibration Damping
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Solution Overview
Problem
Existing fuel injection systems face challenges in achieving precise and reliable coupling between fuel injection valves and cylinder heads, leading to potential misalignment, noise, and difficulty in service operations due to manufacturing tolerances and vibration issues.
Innovation Solution
An adjustment device comprising a ring element with a metallic coil spring component and an elastomeric component, where the elastomeric material surrounds the metallic component in a toroidal shape, providing stiffness for precise positioning, damping vibrations, and reducing noise, while allowing for easy assembly and disassembly, and maintaining a reliable seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid spacer ring is used to couple the fuel injection valve to the cylinder head, then manufacturing precision and alignment are improved, but vibration damping and noise reduction deteriorate
Solution Approach 1:
The spacer ring is constructed as a composite structure with an inner rigid metal component providing dimensional stability and alignment precision, and an outer elastomeric component providing vibration damping and noise reduction. This composite design simultaneously achieves both manufacturing precision and harmful factor reduction.
Solution Approach 2:
Different regions of the spacer ring have different material properties: the inner metal core provides rigidity and precision in critical alignment areas, while the outer elastomeric layer provides damping and noise reduction in contact areas with the cylinder head and valve housing.
2Stability of the object's composition
If a rigid spacer ring is used for coupling, then structural stability is improved, but ease of assembly and disassembly deteriorates
Solution Approach 1:
The spacer ring combines a rigid metal core for structural stability with an elastomeric outer layer that provides elastic deformation capability, enabling the coupling to be stable during operation but flexible during assembly and disassembly operations.
3Manufacturing precision
If manufacturing tolerances are reduced to improve alignment precision, then positioning accuracy is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention changes the material parameter from homogeneous rigid material to composite material with different stiffness characteristics. The elastomeric outer layer compensates for dimensional variations and misalignments, allowing standard manufacturing tolerances to achieve the same functional precision that would otherwise require tighter tolerances and more complex manufacturing processes.
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
The solution enables precise alignment and stable positioning of fuel injection valves, reduces noise and vibration, facilitates easy service operations, and maintains a reliable seal, thereby improving the overall performance and durability of the fuel injection system.
Implementation Method 1
the metallic component (32) comprises a coil spring
Implementation Method 2
the elastomeric component (34) surrounds the metallic component (32) in such fashion that it completely envelops the metallic component
Data Source
AI summary
The present disclosure relates to fuel injection systems. The teachings thereof may be embodied in an adjustment device for a fuel injection valve including a ring element to fit a recess of the cylinder head between a valve housing and the cylinder head to align the valve relative to the recess. The ring element may include a metallic coil spring and an elastomeric component surrounding and completely enveloping the metallic component.