Fuel Injector Fixing Structure for Common Rail Pressure Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel rail structures face challenges in preventing the departure of fuel injectors during transfer, assembly, removal, and replacement while maintaining the absorption of high pressures applied to the fuel injectors, leading to potential impacts and inefficiencies.
Innovation Solution
An additional fixing member is introduced, which is elastically supported by a damping member and fixed to the fuel injector through a via hole, ensuring secure attachment and preventing departure by engaging bumps and a modifiable connection unit between the mounting lug and injector holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a damping member is used to absorb high pressure applied to the fuel injector, then the fuel injector can withstand injection pressure, but the fuel injector may depart from the injector holder during transfer, assembly, removal, or replacement
Solution Approach 1:
The patent combines the damping member and fixing member into a single integrated component. The fixing member includes a holding part that surrounds the fuel injector body and a fixing part that engages with the injector holder, while the damping part absorbs high pressure. This merging allows the component to simultaneously provide both pressure absorption and secure retention, resolving the contradiction between these two functions.
Solution Approach 2:
The fixing member is designed to perform multiple functions: it acts as both a damping member for absorbing high pressure during fuel injection and a fixing member for securing the fuel injector to the injector holder. The integrated structure includes a holding part for retention and a damping part for pressure absorption, making it a universal component that addresses both requirements in one element.
2Reliability
If the fuel injector is securely fixed to prevent departure, then retention reliability improves, but the damping member's pressure absorption function may be compromised
Solution Approach 1:
The patent merges the fixing function and damping function into a single integrated fixing member. The holding part provides secure retention by surrounding the fuel injector and engaging with the injector holder, while the damping part simultaneously absorbs high pressure. This integration ensures that both retention reliability and pressure absorption capability are maintained without compromise.
3Reliability
If additional fixing members are added to prevent fuel injector departure, then retention reliability improves, but device complexity increases
Solution Approach 1:
Instead of adding separate fixing members and damping members as distinct components, the patent merges them into a single integrated fixing member. This reduces the number of parts and assembly steps while maintaining both the retention and pressure absorption functions, thereby improving reliability without significantly increasing device complexity.
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 effectively absorbs high pressures and prevents fuel injector departure during handling and operation, ensuring reliable operation and easy replacement while maintaining the damping member's pressure-absorbing function.
Implementation Method 1
each mainly includes a fixing part surrounding and fixing the fuel injector 50, and damping parts integrally formed at a side of the fixing part, having elasticity, and absorbing the pressures transferred from the fuel injector 50
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fuel injector fixing structure of a fuel rail of a vehicle includes a main pipe having two ends connected to a plug and an end cap; a plurality of injector holders fixed onto an outer surface of the main pipe at predetermined intervals; a mounting lug disposed adjacent to the injector holder; a fuel injector detachably fixed into the injector holder; a damping member detachably attached to the fuel injector and elastically supporting the fuel injector with respect to the injector holder; and a fixing member for detachably fixing the fuel injector on to the injector holder. Accordingly, since a fuel injector is elastically supported by a damping member and is fixed by an additional fixing member, a high pressure applied to the fuel injector when the fuel injector injects fuel may be absorbed and departure of the fuel injector when a fuel rail is transferred, assembled, removed, or replaced may be prevented while the role and function of the damping member is maintained.