Prestressed Spring Holder for Fuel Distributor Damping
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Solution Overview
Problem
Existing solutions for noise reduction in internal combustion engines, such as those using retaining clamps for fuel distributors, suffer from deteriorating damping properties over time, leading to increased wear and mechanical failure due to vibrational stressing.
Innovation Solution
A bearing holder with a prestressed metallic spring element and an elastically deformable damping element, where the spring element ensures minimum prestressing and decoupling, reducing the impact of settling and tolerances, and is configured as a disk-shaped or wave-shaped spring element to maintain effective damping over a long service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damping element is used for fastening the fuel distributor to the cylinder head, then vibration damping and noise reduction are improved, but the damping properties deteriorate over time due to creeping or settling of the elastomer
Solution Approach 1:
The patent introduces a spring element that changes the prestressing parameter of the damping element over time. The spring element compensates for the reduction in prestressing force caused by elastomer settling, thereby maintaining consistent damping performance throughout the service life of the fastening device.
Solution Approach 2:
The patent combines two different materials with complementary properties: an elastomer damping element for vibration absorption and a metallic spring element for maintaining prestress. This composite structure leverages the advantages of both materials to achieve reliable, long-term damping performance.
2Reliability
If very high-grade elastomers and precisely manufactured attachment parts are used to counter settling effects, then damping performance is maintained, but costs increase
Solution Approach 1:
Instead of relying on high-grade materials and precise manufacturing to prevent settling, the patent uses a spring element to actively compensate for settling effects. This approach maintains damping performance with standard-grade materials, significantly reducing manufacturing costs.
3Reliability
If the stressing in the elastomer is set low to minimize settling effect, then component wear is reduced, but installation space requirements increase
Solution Approach 1:
The spring element dynamically adjusts the prestressing parameter of the damping element, allowing low initial stress (to minimize settling and wear) while automatically compensating to maintain adequate damping force over time. This enables compact design without sacrificing reliability.
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 provides sustained vibration damping and noise reduction, reducing wear and mechanical failure risks while minimizing material and installation space requirements, and lowering costs by ensuring consistent damping performance even with large tolerances and settling effects.
Implementation Method 1
a spring element (9), especially a metallic spring element, which is prestressed in the mounted state
Implementation Method 2
the elastically deformable damping element may be configured based on at least one elastomer
Implementation Method 3
a damping element is used that ensures damping at the interface to the cylinder head
Implementation Method 4
the elastically deformable damping element may be configured based on at least one elastomer
Data Source
AI summary
A holder for fastening at least one component, particularly a fuel distributor, to an internal combustion engine. The holder includes an elastically deformable damping element, a holder body and a spring element, which are situated lying one behind the other with reference to an axis. In response to an assembly using the fastening arrangement, a prestressing of the spring element and a prestressing of the damping element are made possible. Furthermore, a fuel injection system is described having a fuel distributor and such a holder, which is used for fastening the fuel distributor on an internal combustion engine.