Fluid Injection Valve Filter with Resilient Fastening Element
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Solution Overview
Problem
Existing fluid injection valves face challenges in manufacturing simplicity and achieving reliable, precise filtration, particularly under high pressures in internal combustion engines, where current filters are complex and prone to malfunction due to impurities and pressure pulsations.
Innovation Solution
A filter design for fluid injection valves comprising a separate filter sleeve and fastening element, which establish a press-fit connection with a resilient joint, allowing for precise calibration and high chemical resistance, ensuring consistent press-fitting force and easy accessibility during calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional integrated filter design is used, then manufacturing is simpler, but filtration reliability and precision deteriorate under high pressures
Solution Approach 1:
The filter is divided into separate components: a filter element and a fastening element. The filter element contains the filtration structure while the fastening element provides the press-fit connection. This segmentation allows each component to be optimized independently for its specific function, improving filtration reliability without requiring a monolithic complex structure.
Solution Approach 2:
The fastening function is extracted from the filter element itself and implemented through a separate fastening element. This allows the filter element to focus solely on filtration performance while the fastening element handles the mechanical connection, enabling reliable operation under high pressures without compromising filtration precision.
2Manufacturing precision
If a separate filter sleeve and fastening element design is used, then manufacturing precision and calibration are improved, but manufacturing complexity increases
Solution Approach 1:
The fastening element serves multiple functions: it provides the press-fit connection, enables precise calibration through its resilient joint mechanism, and ensures consistent positioning of the filter element. By consolidating these functions into a single standardized component, the design achieves high manufacturing precision without proportionally increasing overall manufacturing complexity.
Solution Approach 2:
The resilient joint in the fastening element allows for parameter adjustment during calibration, enabling precise control of the press-fit force. This adjustability feature facilitates accurate calibration while the standardized design of the fastening element keeps manufacturing processes manageable through repetition and automation.
3Reliability
If a press-fit connection with resilient joint is used, then consistent press-fitting force is achieved, but device complexity increases
Solution Approach 1:
The resilient joint in the fastening element automatically provides the necessary press-fitting force through its elastic properties. The joint deforms during assembly to create the connection and then maintains consistent contact pressure without requiring additional adjustment mechanisms or external force application devices. This self-regulating mechanism ensures reliable press-fitting consistency while keeping the overall structure relatively simple.
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 filter design enhances manufacturing efficiency, achieves precise calibration, and maintains consistent press-fitting force across different calibration targets, reducing the risk of malfunction and improving fluid filtration under high pressures.
Implementation Method 1
a resilient joint, allowing for precise calibration and high chemical resistance, ensuring consistent press-fitting force
Data Source
Figure 1
Figure 2~3
AI summary
A filter (101) for a fluid injection valve (100) is specified. The filter (101) comprises a filter sleeve (102) and a fastening element (120). The fastening element (120) comprises a fitting portion (122) for fastening the filter in the fluid injection valve (100) and a connection portion (121) mechanically interacting with a first part (103) of the filter sleeve (102) for connecting the filter sleeve (102) and the fastening element (120). The filter sleeve (102) comprises a second part (104), the second part (104) being arranged inside the fastening element (120) and being disposed at a distance (116) from the fitting portion (122) of the fastening element (120). Further, a fluid injection valve (100) and a method for producing the filter (101) are disclosed.