Spring Element Injection Valve Noise Damping
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Solution Overview
Problem
High pressure injection arrangements in internal combustion engines with direct injection produce undesirable noise due to mechanical momentum transfer, leading to solid-borne sound conduction and oscillation excitation in the engine block, particularly the cylinder head, which existing solutions fail to effectively dampen.
Innovation Solution
A spring element, such as a spring washer, is interposed between the injection valve and the support element, allowing momentum to be first absorbed by the spring element before being transferred to the support element, thereby reducing the mechanical momentum input into the cylinder head, and a cage element support is used to further dampen residual momentum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigid support element directly supports the injection valve on the cylinder head, then structural stability is ensured, but mechanical momentum is directly transferred causing noise emissions
Solution Approach 1:
A spring element is introduced as an intermediary component between the injection valve and the support element. This spring element absorbs mechanical momentum through elastic deformation, preventing direct transmission to the cylinder head while maintaining structural support. The spring element acts as a mediator that decouples the rigid connection, thereby reducing noise emissions without compromising structural stability.
Solution Approach 2:
The spring element is pre-installed between the injection valve and support element to provide beforehand cushioning against mechanical momentum. When the solenoid valve operates, the spring element is already in position to absorb the impact through elastic deformation, cushioning the momentum transfer before it reaches the rigid support structure and cylinder head.
2Object-affected harmful factors
If a spring element is introduced between the injection valve and support element, then momentum damping is improved, but device complexity increases
Solution Approach 1:
The spring element is designed as a thin, flexible component that can be easily integrated into the existing support structure. This flexible element provides momentum damping through its elastic properties while maintaining a simple, compact form factor that does not significantly increase device complexity or installation space requirements.
3Volume of stationary object
If the spring element and support element are spaced far apart, then installation space is reduced, but momentum damping effectiveness is reduced
Solution Approach 1:
The spring element is designed with optimized geometric parameters (wire diameter, mean diameter, number of active coils) to achieve the desired momentum damping effectiveness within a compact space. The dynamic elastic properties of the spring allow it to provide sufficient damping force while maintaining a small installation volume, balancing space constraints with damping performance.
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 arrangement significantly reduces the mechanical momentum transferred to the cylinder head, effectively minimizing noise emissions by creating a spring-mass system that damps oscillations, achieving better noise reduction compared to prior art solutions.
Implementation Method 1
A spring element, specifically a spring washer, is arranged between the injection valve and the support element. In this way, the momentum that is produced by the solenoid valve of the injection valve is not transferred from the housing of the injection valve directly to the support element, but rather the momentum is first transferred to a spring element that is arranged between the support element and the injection valve and from the latter to the support element.
Implementation Method 2
In this way, a considerable portion of the momentum in the spring element is already consumed. The support element is therefore only affected by momentum to a far lesser extent than in the prior art, so that its share of the residual momentum to be damped is relatively small.
Data Source
AI summary
The invention relates to a high pressure injection arrangement for an internal combustion engine with direct injection, with an injection valve and a support element, which supports the injection valve in the installed state on a seat of an internal combustion engine. It is provided that a spring element is arranged between the injection valve and the support element.