Complementary Smooth Surface Fuel Injector Connection
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Solution Overview
Problem
High pressure fluid systems in vehicle engines, particularly fuel injection systems, face challenges in accessibility and ease of assembly due to multiple tightly interconnected devices, making servicing difficult in confined spaces.
Innovation Solution
A fuel injection system design featuring injectors with complementary smooth surfaces and a screw clamping plate that securely connects pipes, allowing for efficient assembly and maintenance by transmitting tightening forces to ensure a sealed connection between orifices, enabling multiple injectors to be connected via intermediate pipes with balanced forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional flange and threaded nut connections are used in fuel injection systems, then reliable sealing and high-pressure resistance are achieved, but accessibility for assembly and servicing is poor in confined engine spaces
Solution Approach 1:
The connection system is divided into separate functional elements: a clamping plate for positioning and sealing, and a screw for tightening. This segmentation allows each component to be optimized independently and simplifies assembly by enabling modular installation in confined spaces.
Solution Approach 2:
The sealing function is extracted from the traditional threaded connection and implemented through complementary smooth surfaces that are pressed together by the clamping plate. This extraction eliminates the need for complex threading operations in tight spaces while maintaining reliable sealing.
2Reliability
If multiple tightly interconnected devices are used in fuel injection systems, then high-pressure fluid transmission is achieved, but ease of maintenance is reduced due to confined accessibility
Solution Approach 1:
The connection system transitions from static threaded joints to a dynamic clamping mechanism where the screw can be independently tightened or loosened. This dynamic adjustment capability allows for easy maintenance and servicing of individual components without disassembling the entire high-pressure fluid system.
3Manufacturing precision
If complementary smooth surfaces are pressed together by a screw clamping plate, then sealed connection is achieved with balanced forces, but manufacturing precision requirements increase
Solution Approach 1:
The complementary smooth surfaces are applied locally at the critical sealing interfaces around the orifices, rather than requiring high precision across the entire component. This localized approach maintains sealing reliability while reducing overall manufacturing complexity and cost.
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 system facilitates easy assembly and maintenance of high-pressure fuel injection systems by providing a secure, sealed connection between injectors and pipes, reducing complexity and space requirements in the engine environment while maintaining high-pressure fuel integrity.
Implementation Method 1
the tightening force being transmitted to the collar so that the smooth surfaces of the pipe and of the injector are sealingly pressed against each other
Data Source
AI summary
A fuel injection system for an internal combustion engine includes an injector having a first orifice to which is tightly connected a pipe having a matching first orifice. Both orifices are surrounded with peripheral smooth surfaces that are complementary surfaces sealingly pressed against each other by a clamping plate.