Fuel Injector Composite Assembly for Large Diesel Engine Maintenance
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Solution Overview
Problem
The assembly and disassembly of injectors in fuel supply systems for large diesel internal combustion engines are time-consuming and require highly skilled personnel due to the complexity and delicacy of individual parts, particularly the mounting of the injection nozzle, solenoid valve, and throttle plate on the retaining body.
Innovation Solution
The injection nozzle and control valve are integrated as a clamped composite, allowing them to be mounted and disassembled as a unit on the retaining body, reducing the complexity and effort required, and enabling easier replacement of worn components with a new unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the injection nozzle, solenoid valve, and throttle plate are mounted as separate individual parts on the retaining body, then the injector can be assembled with precise positioning of each component, but the assembly process becomes time-consuming and requires highly skilled personnel
Solution Approach 1:
The injection nozzle and control valve are merged into a single integrated component assembly. This allows the two previously separate parts to be mounted together as one unit on the retaining body, reducing the number of assembly steps while maintaining precise positioning through the unified mounting structure.
Solution Approach 2:
The injector assembly is segmented into two main parts: the integrated injection nozzle-control valve assembly and the retaining body. This segmentation allows the complex multi-component assembly to be simplified into fewer modular units that can be assembled more efficiently while preserving the precision requirements of individual components.
2Reliability
If multiple delicate individual parts are assembled on the retaining body, then the injector achieves proper functionality, but the assembly requires great precision and skill
Solution Approach 1:
The injection nozzle and control valve are combined into a single integrated assembly, reducing the number of delicate parts that need to be handled separately during assembly. This maintains the functional reliability of both components while significantly improving ease of operation, as fewer precision-critical assembly steps are required.
Solution Approach 2:
The integrated assembly structure acts as an intermediary that pre-positioned the injection nozzle and control valve in their correct functional relationships. This intermediary structure transfers the complexity from the assembly process to the manufacturing process, making field assembly much easier while preserving functional reliability.
3Adaptability or versatility
If the injection nozzle and control valve are mounted separately on the retaining body, then each component can be individually positioned, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The injection nozzle and control valve are merged into a single integrated assembly, reducing assembly complexity from mounting multiple separate parts to mounting one unified component. This maintains adaptability in positioning through the integrated design while dramatically simplifying the overall assembly process.
Data Source
AI summary
An injector for a fuel supply system of an internal combustion engine, namely for a common rail fuel supply system of an internal combustion engine which is formed in particular as a large diesel internal combustion engine or ship's diesel internal combustion engine, having an injection nozzle, a control valve and a retaining body. The injection nozzle and the control valve form a clamped composite, and the composite formed of the injection nozzle and control valve can be mounted on the retaining body as a unit and disassembled from the retaining body as a unit.