Adjusting Filter Sleeve for Fluid Injection Valves
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Solution Overview
Problem
The manufacturing and assembly of adjusting fuel filter assemblies for fluid injection valves are complex and costly, making them difficult to produce and integrate into internal combustion engines effectively.
Innovation Solution
An adjusting filter for fluid injector valves is designed with an elongate filter sleeve having distinct sections for improved axial alignment and a press-fit connection, combined with a filter insert made of metal mesh or porous materials, simplifying assembly and enhancing filtering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional adjusting fuel filter assembly with multiple parts is used, then both filtering function and adjusting function are provided, but manufacturing and assembling becomes complicated and expensive
Solution Approach 1:
The patent combines the adjusting function and filtering function into a single integrated adjusting filter assembly (102). The filter sleeve (122) with its press-fit section (132) and centring section (134) integrates both the adjusting mechanism for spring load calibration and the filtering function, eliminating the need for separate adjusting mechanisms and reducing assembly complexity
Solution Approach 2:
The adjusting filter assembly serves multiple functions simultaneously: the press-fit section (132) provides mechanical attachment and adjustment capability, the centring section (134) ensures proper alignment, and the filter insert (142) performs filtering. This multi-functional design reduces the number of separate components needed
2Reliability
If a traditional adjusting fuel filter assembly is used, then filtering and adjusting functions are provided, but assembly process becomes complicated
Solution Approach 1:
The filter sleeve (122) is segmented into distinct functional sections: the press-fit section (132) for mechanical attachment, the centring section (134) for alignment, and the filter accepting section (130) for housing the filter insert (142). This segmentation allows each section to be optimized for its specific function while simplifying the overall assembly process through modular design
Solution Approach 2:
The filter insert (142) is designed to be pre-assembled into the filter accepting section (130) of the filter sleeve (122) before installation into the injection valve. This preliminary assembly simplifies the final installation process and ensures proper positioning and alignment during assembly
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 cost-effective, robust, and easily manufacturable filter assembly that provides precise filtering and spring calibration, improving the efficiency and reliability of fluid injection systems at high pressures.
Implementation Method 1
a press-fit section (132) and a centring section (134)
Implementation Method 2
a filter insert (142) arranged in the filter accepting section (130)
Data Source
AI summary
Various embodiments include an adjusting filter for a fluid injector valve comprising: an elongate filter sleeve having an inlet and an outlet; and a filter insert. The filter sleeve includes a filter accepting section at the inlet, a press-fit section, a centring section at the outlet, and a spring engaging surface surrounding the outlet. The press-fit section is arranged between the filter accepting section and the centring section. The filter insert is arranged in the filter accepting section. The filter accepting section has an outer diameter smaller than an outer diameter of the press-fit section. The centring section has an outer diameter smaller than the outer diameter of the press-fit section.