Multi-Aperture Fuel Injector for High-Pressure Atomization Reliability
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Solution Overview
Problem
High-pressure fuel injectors face issues such as clogging, wear and tear, leakage, inconsistent fuel delivery, and high maintenance costs due to contamination and wear, and noise generation, which affect engine performance and emissions, and these challenges have not been adequately addressed by existing systems.
Innovation Solution
A high-pressure fuel injection system with a novel design incorporating a multi-aperture injection nozzle, high-pressure and low-pressure pistons, a volume displacement valve, and a single solenoid valve to control fluid flow, ensuring precise fuel atomization and delivery, reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure fuel injectors operate at higher pressures (25-35 ksi), then fuel atomization and combustion efficiency are improved, but maintenance costs and system reliability deteriorate
Solution Approach 1:
The injection nozzle is divided into multiple aperture groups with different diameters (first subgroup with first diameter, second subgroup with second diameter), allowing different atomization patterns for improved combustion efficiency while reducing pressure requirements on individual nozzles
Solution Approach 2:
Different aperture diameters are provided in different regions of the injection nozzle to create varied spray patterns and atomization characteristics, optimizing fuel distribution and combustion efficiency without requiring uniformly high pressure across all apertures
2Productivity
If high-pressure fuel injectors operate at higher pressures, then combustion completeness is improved, but clogging and deposits increase
Solution Approach 1:
Multiple aperture groups with different diameters distribute fuel flow across more pathways, reducing the pressure burden on individual apertures and minimizing deposit accumulation and clogging while maintaining effective atomization
Solution Approach 2:
The system uses a piston mechanism that provides variable pressure control during the injection cycle, allowing optimal pressure at the moment of injection while reducing peak pressure exposure that causes clogging and deposits
3Manufacturing precision
If high-pressure fuel injectors operate at higher pressures, then atomization quality is improved, but wear and tear increase
Solution Approach 1:
The injection nozzle is segmented into multiple aperture groups, distributing the total fuel flow across more pathways and reducing the pressure stress on individual apertures and components, thereby extending injector lifespan while maintaining atomization quality
Solution Approach 2:
The piston-based pressure control system provides dynamic pressure variation during the injection cycle, optimizing atomization quality at the moment of injection while reducing sustained high pressure exposure that causes wear and extends component lifespan
4Measurement precision
If high-pressure fuel injectors operate at higher pressures, then fuel delivery precision is improved, but leakage and drips increase
Solution Approach 1:
Multiple aperture groups with different diameters provide controlled fuel distribution pathways, improving delivery precision while the piston-controlled pressure regulation prevents excessive pressure that would cause leakage and drips
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 enhances engine efficiency, reduces emissions, and lowers operating costs by providing consistent fuel delivery and minimizing wear, noise, and maintenance requirements, while achieving complete combustion with sub-micron droplet sizes.
Implementation Method 1
a high-pressure piston configured to be in fluid communication with the injection nozzle assembly
Implementation Method 2
providing consistent fuel delivery and minimizing wear, noise, and maintenance requirements, while achieving complete combustion with sub-micron droplet sizes
Implementation Method 3
a single solenoid valve that is configured to control fluid flow into the shuttle housing
Implementation Method 4
improving atomization and thus achieve a more complete combustion, improving efficiency
Data Source
AI summary
A fuel injector is provided. The fuel injector is operable to inject fuel at extremely high pressures which creates very small droplet sizes, allowing for efficient self-ignition of the fuel and allows for clean, efficient combustion due to the small droplet sizes. The fuel injector uses pressure from within a combustion chamber to actuate the spraying of fuel from the injector, thereby solving many problems experienced by typical fuel injectors and eliminating many problem-components of prior art fuel injectors.