Common Rail Fuel Quantity Control Valve Relocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing common rail systems for internal combustion engines lack a compact and maintenance-friendly structure, with the fuel quantity control valve integrated into the high-pressure feed pump, making it difficult to access and maintain.
Innovation Solution
The common rail system relocates the fuel quantity control valve to the rail body, allowing for electrical control and integration with a pressure sensor and pressure relief valve on a flat control surface, while maintaining all hydraulic connections on a separate connection surface, enabling a compact and service-friendly design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fuel quantity control valve is integrated into the high-pressure feed pump, then the pump structure is compact, but the valve becomes difficult to access and maintain
Solution Approach 1:
The system is divided into separate functional modules: the high-pressure feed pump and the fuel quantity control valve are positioned as distinct components rather than being integrated. This segmentation allows the pump to remain compact while the valve is independently accessible on the rail body for maintenance purposes.
Solution Approach 2:
The patent introduces an intermediary electrical connection system that allows the fuel quantity control valve to be electrically controlled while being physically separated from the feed pump. This enables the valve to be positioned for easy accessibility while maintaining functional integration through electrical control signals.
2Adaptability or versatility
If control elements are distributed throughout the system, then functionality is enhanced, but the system structure becomes more complex
Solution Approach 1:
Multiple control and safety elements (fuel quantity control valve, pressure sensor, pressure relief valve) are merged onto a single flat control surface of the rail body. This consolidation provides enhanced functionality while maintaining a structured, organized layout that reduces overall system complexity compared to distributed placement.
Solution Approach 2:
The flat control surface serves as a universal mounting platform for multiple different control elements, allowing them to be integrated into a cohesive structure. This multi-functional surface design enables various components to share a common interface and mounting system, simplifying the overall structure.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a common rail (16) having a preferably cube-shaped rail body (26) with a connection surface (44) and a control surface (62). All the hydraulic connections, such as the high-pressure inlet (30), the high-pressure outlets (32), the low-pressure feed inlet (38), the low-pressure feed outlet (40), and the return flow connection (46), are formed on the connection surface side. The fuel quantity regulating valve (64) which is connected between the low-pressure feed inlet (38) and the low-pressure feed outlet (40) is located on the control surface side. Furthermore, the pressure sensors (68), the pressure control valve (70), and the relief valve (72) are arranged on the control surface side. The protective cover (54) closes and protects the connection surface (62) and the elements arranged thereon from the surroundings.