Valve Closure Member with Elastomeric Seal and Concave Recess
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Solution Overview
Problem
Existing valve assemblies and fluid injectors face challenges in achieving optimal sealing and mechanical stability while maintaining cost-effectiveness and dimensional precision, particularly in the context of internal combustion engine injection valves.
Innovation Solution
A valve assembly comprising a one-piece, sleeve-shaped valve body with a metal or plastic construction and an elastomeric seal featuring a convexly curved surface for secure attachment, providing a double seal mechanism through concentric sealing edges and a concave annular recess for enhanced sealing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve closure member with an elastomeric seal is used, then sealing performance is improved, but the risk of damage to the valve body increases
Solution Approach 1:
The valve body features a localized recess structure at the sealing area, creating a cushioning zone that concentrates deformation in a specific region. This local structural modification allows the elastomeric seal to deform effectively for sealing while protecting the main valve body from damage.
2Ease of manufacture
If a one-piece sleeve-shaped valve body is used, then manufacturing cost and complexity are reduced, but achieving optimal sealing and dimensional precision becomes more difficult
Solution Approach 1:
The recess structure introduces a localized geometric feature that enhances sealing capability without requiring complex multi-part construction. This single integrated feature achieves improved dimensional precision at the sealing interface while maintaining the simplicity of a one-piece manufacturing approach.
3Reliability
If the elastomeric seal has a convexly curved surface, then attachment security is improved, but the complexity of the sealing structure increases
Solution Approach 1:
The elastomeric seal incorporates a convexly curved surface that complements the recess geometry in the valve body. This curvature enhances attachment security through improved contact area and mechanical interlocking, while the overall structure remains relatively simple due to the natural form of the elastomeric material.
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 a lightweight, cost-efficient valve assembly with improved sealing performance and reduced risk of damage, ensuring effective sealing and operational reliability in fluid injection applications.
Implementation Method 1
The valve closure member (1) comprises a valve body (2) and an elastomeric seal (3) which is arranged at a front end of the valve body (2) and fixed thereto. The axial distance (a) between the bearing surface (6) and the second longitudinal end (5) is smaller than the axial distance (b) between the bearing surface (6) and the first longitudinal end (4).
Data Source
Figure 1~2
AI summary
A valve closure member (1) comprising a valve body (2) and an elastomeric seal (3) is disclosed. The valve body (2) extends along a longitudinal axis (MB) from a first longitudinal end (4) toward a second longitudinal end (5). The valve body (2) has a front surface (17) at its second longitudinal end (5) comprising an annular recess (30) being concentric to the longitudinal axis (MB). The recess (30) has an annular bottom (31) having a concavely curved cross-section. The elastomeric seal (3) has an annular surface (33) with a convexly curved cross-sectional shape by means of which the elastomeric seal (3) is secured to the annular bottom (31). Further, a front surface (34) of the elastomeric seal (3), facing away from the valve body (2), has a concavely curved cross-sectional shape. In addition, a valve assembly (10) and a fluid injector (100) are disclosed.