Plastic Fuel Rail with Embedded Metal Reinforcement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel rail assemblies face challenges in reliability due to high temperatures, vibrations, and operational stresses, particularly when using plastic materials in high-pressure fuel injection systems, which can lead to deformation and material compatibility issues.
Innovation Solution
A fuel rail assembly formed from plastic material with discrete metal reinforcing elements integrated within specific regions to enhance strength and minimize flexing, ensuring the reinforcing elements do not contact fuel and are securely embedded during the moulding process, allowing for localized reinforcement and improved structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If plastic material is used for fuel rail body, then weight and manufacturing cost are reduced, but strength and reliability under high pressure and temperature deteriorate
Solution Approach 1:
The fuel rail is constructed as a composite structure combining plastic material for the main body with discrete metal reinforcing elements embedded in high-stress regions. This allows the fuel rail to achieve the lightweight advantage of plastic while obtaining the strength and temperature resistance of metal where needed, resolving the contradiction between weight reduction and strength maintenance.
2Ease of manufacture
If plastic material is used for fuel rail body, then manufacturing cost is reduced, but reliability under high temperature and vibration deteriorates
Solution Approach 1:
The composite construction using plastic with embedded metal reinforcing elements provides both cost effectiveness and reliability. The plastic material offers ease of manufacture and cost advantages, while the metal reinforcing elements ensure reliability under high temperature and vibration conditions by providing structural integrity in critical areas.
3Strength
If metal reinforcing elements are added to plastic fuel rail, then strength in predetermined regions is improved, but device complexity increases
Solution Approach 1:
Metal reinforcing elements are strategically placed only in predetermined high-stress regions such as injector cup areas and connection points, rather than throughout the entire fuel rail. This localized reinforcement approach provides necessary strength where needed while keeping the overall structure simple and maintaining the cost advantages of plastic construction in non-critical areas.
4Adaptability or versatility
If plastic fuel rail is used, then adaptability to space constraints is improved, but dimensional tolerances under stress deteriorate
Solution Approach 1:
The plastic fuel rail maintains excellent adaptability to space constraints through its molded construction, while metal reinforcing elements are embedded in specific regions to maintain dimensional tolerances under stress. The plastic material provides design flexibility for accommodating engine bay spaces, and the localized metal reinforcement ensures precision where dimensional stability is critical.
Data Source
Figure 1
Figure 2~3
AI summary
A fuel rail assembly (2) for a fuel injection system for an internal combustion engine is provided, the fuel rail assembly comprising a fuel rail (4) having a fuel rail body (5). The fuel rail (4) is formed of a plastic material and comprises an elongate fuel rail body (5) having an inlet port (6) to which fuel is supplied at pressure to the reservoir, and a plurality of outlet ports (8) each incorporating an injector cup adapted to receive an associated fuel injector. A reinforcing element (20) is located integrally in the fuel rail body (5) in a predetermined region to strengthen the fuel rail (4) in the predetermined region.