Fuel Injection Valve Mounting System with Dished Disk
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Solution Overview
Problem
Existing fuel injection systems experience noise issues due to metallic transitions during engine operation, particularly when the engine is idling, and as fuel injection pressure increases, these noises become more pronounced, affecting customer perception and vehicle interior comfort.
Innovation Solution
A mounting system for fuel injection valves that uses a dished disk with a spherical support surface and a decoupling element, such as an elastomer-based component, to absorb mechanical loads and provide improved geometrical alignment and bracing, eliminating the need for direct fastening to the cylinder head and reducing vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a direct mounting system is used to secure the fuel injection valve to the fuel-conveying component, then the mechanical strength and positioning stability are improved, but noise and vibrations are transmitted more directly, worsening the acoustic performance
Solution Approach 1:
The patent introduces a decoupling element as an intermediary component between the fuel injection valve and the fuel-conveying component. This decoupling element absorbs mechanical loads and vibrations while maintaining the necessary mechanical connection, thereby reducing noise transmission without compromising mounting strength
Solution Approach 2:
The mounting system employs composite construction by combining different material properties - the decoupling element is made from materials that provide both mechanical strength for load-bearing and vibration-damping characteristics to reduce noise, creating a multi-functional composite structure
2Device complexity
If conventional mounting systems are used, then the structural simplicity is maintained, but the alignment precision and geometrical positioning of the fuel injection valve are insufficient
Solution Approach 1:
The patent employs a dished disk with a spherical support surface that interfaces with a corresponding spherical bearing surface on the fuel injection valve. This spherical geometry provides self-aligning characteristics, ensuring precise geometrical positioning and alignment while maintaining structural simplicity through the curved surface design
3Ease of operation
If the fuel injection valve is directly fastened to the cylinder head, then the installation simplicity is improved, but the vibration transfer and noise transmission are increased
Solution Approach 1:
The decoupling element serves as a mediator between the fuel injection valve and the mounting system, absorbing vibrations and reducing noise transmission while allowing for straightforward installation through the integrated mounting structure
Solution Approach 2:
The mounting system incorporates vibration-damping and noise-reducing features in advance through the decoupling element and elastomeric components, which are pre-configured to absorb and dissipate vibrations before they can be transmitted to the cylinder head and surrounding structure
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 quiet and reliable operation by absorbing fuel pressure forces through the dished disk, ensuring precise alignment and reducing noise transmission, thus enhancing the installation and performance of fuel injection valves in internal combustion engines.
Implementation Method 1
a decoupling element (15), in particular an elastomer-based decoupling element, which is configured to absorb at least some of the mechanical loads
Data Source
AI summary
A mounting system for fuel injection systems connects a fuel injection valve to a fluid-conveying component and includes a connector piece of the metering valve being inserted at least partly into a receiving space of a connector body of the component; a support part disposed on the connector piece; a decoupling element; a dished disk inserted into a receiving space of the connector body and immobilized along a longitudinal axis of the receiving space relative to the connector body. The support part has a spherical support surface that faces toward a dished surface of the dished disk. The decoupling element is disposed between the spherical support surface of the support part and the dished disk. The connector piece is mounted on the connector body via the support part, decoupling element, and dished disk.