Forged Fuel Distributor Rail with Offset Holding Elements
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Solution Overview
Problem
Existing fuel distributor rails for spark-ignited internal combustion engines face challenges in withstanding high stresses and preventing excessive wear on seals due to reaction forces from hydraulic pressure, particularly when fastened at a cylinder head, which can lead to deflection and increased stress on screws.
Innovation Solution
A forged fluid distributor design with two strategically positioned holding elements, made from high-quality stainless steel, that counteract reaction forces and reduce stress on seals by optimizing the arrangement of holding elements along the tubular base body's longitudinal axis, allowing for efficient fastening and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple holding elements are used to fasten the fluid distributor, then the stability and stress distribution improve, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates unnecessary holding elements from the fastening system. By analyzing the stress distribution and functional requirements, the invention determines that only two holding elements are necessary to achieve sufficient stability, thereby reducing device complexity and manufacturing cost while maintaining adequate fastening performance.
2Object-affected harmful factors
If holding elements are positioned to counteract reaction forces, then seal wear is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies asymmetric positioning of the two holding elements along the longitudinal axis of the tubular base body. This asymmetric arrangement is specifically designed to counteract the reaction forces generated during operation, thereby reducing seal wear. The asymmetric design optimizes the distribution of stresses while maintaining manufacturability within standard precision tolerances.
3Strength
If high-quality materials are used for the forged base body, then the strength and durability improve, but the manufacturing cost increases
Solution Approach 1:
The patent specifies particular material parameters and properties for the forged base body, selecting high-quality materials with appropriate strength characteristics. By carefully defining and controlling material parameters, the invention achieves the necessary strength and durability while optimizing manufacturing cost through efficient material selection and forging process parameters.
Data Source
AI summary
A fuel distributor for a fuel injection system for mixture-compressing, spark-ignited internal combustion engines. The fuel distributor rail includes a tubular base body which is processed by forging. At the base body, a first high-pressure output, a second high-pressure output, and a third high-pressure output are provided. The second high-pressure output is situated in an offset manner opposite the first high-pressure output in a first direction along a longitudinal axis of the tubular base body at a predefined distance. The third high-pressure output is situated in an offset manner opposite the second high-pressure output in the first direction along the longitudinal axis at the predefined distance. A first and second holding element, which are used for an at least indirect fastening of the base body, are situated at the tubular base body.