Combustion Aerosol Generator With Controlled Fuel Dripping
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Solution Overview
Problem
Existing methods for generating combustion aerosols from liquid fuel lack control over particle size distribution and concentration, especially when using actual vehicle exhaust, which results in inconsistent output and changes during transport.
Innovation Solution
A system comprising a furnace with a heating tube wrapped in heating tape, a fuel line for dripping liquid fuel onto the tube's inner surface, and an air line for directing compressed air to mix with combustion products, allowing for controlled vaporization and aerosol formation with adjustable parameters like fuel feed rate and air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If actual vehicle exhaust is used to generate combustion aerosols, then the aerosols can be produced, but the particle size distribution and concentration change during transport through long tubes and there is very little control over the output
Solution Approach 1:
The patent extracts the aerosol generation process from the complex vehicle exhaust system and isolates it in a controlled laboratory furnace. By taking out the essential combustion function and separating it from the vehicle exhaust system, the invention eliminates the transport issues and gain control over particle size and concentration without requiring long tube transport.
Solution Approach 2:
The patent creates a simplified copy of the combustion process that replicates the essential aerosol generation function without the complexities of actual vehicle exhaust systems. The furnace with heating tape and controlled fuel delivery provides a controlled copy of combustion conditions, allowing reproducible aerosol generation without transport-induced variations.
2Reliability
If small engines are located inside or outside a test chamber to generate aerosols, then aerosols can be produced, but there is very little control of the output and particle size distribution changes during transport
Solution Approach 1:
The patent incorporates feedback control mechanisms through controlled fuel delivery and air supply to the heating tube. By monitoring and adjusting fuel flow rate and air intake, the system maintains consistent combustion conditions and aerosol output, providing reliable control over particle size distribution and concentration without the operational complexities of engine-based systems.
Solution Approach 2:
The patent enables precise control by allowing independent adjustment of key parameters including fuel flow rate, heating temperature, and air flow rate. These parameter changes allow the system to optimize aerosol generation conditions and maintain consistent output, overcoming the lack of control inherent in engine-based aerosol generators.
3Productivity
If liquid fuel is dripped onto the inner surface of the heating tube, then vaporization and combustion occur immediately, but the system requires precise control of fuel delivery and heating temperature
Solution Approach 1:
The patent applies preliminary action by pre-heating the heating tube to the required temperature before fuel delivery begins. This ensures that when fuel is introduced, vaporization and combustion occur immediately and consistently. The preliminary temperature preparation eliminates delays and ensures reliable, controlled aerosol generation from the start.
Solution Approach 2:
The patent replaces complex mechanical fuel injection systems with a simpler controlled dripping mechanism. By substituting the mechanical precision requirements of injection systems with a controlled liquid delivery approach, the system achieves reliable fuel atomization and combustion while simplifying the overall control requirements for fuel delivery precision.
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
Enables precise control over particle size and concentration of combustion aerosols, maintaining consistency without the need for actual vehicle exhaust, and allows for laboratory-scale generation of aerosols with varied properties.
Implementation Method 1
a power supply to heat the heating tape and the inner heating tube to vaporize the liquid fuel dripped onto the inner surface
Implementation Method 2
a power supply to heat the heating tape and the inner heating tube to vaporize the liquid fuel
Implementation Method 3
an air line connected to the heating tube for directing compressed air through the inner heating tube to mix with the combustion products and transport the formed combustion aerosols
Implementation Method 4
vaporize the liquid fuel dripped onto the inner surface of the inner heating tube whereby there is an immediate combustion to form combustion products
Data Source
AI summary
A system and method for generating combustion aerosols from liquid fuel. The system includes a furnace with an inner heating tube having a heating tape wrapped thereabout. Further, the system includes a fuel line extending through an inlet end of the heating tube and into the heating tube, and a means for dripping the liquid fuel onto a plurality of different locations on an inner surface of the heating tube. The system further includes a power supply to power the heating tape to heat the inner heating tube to a temperature which can ignite the liquid fuel dripped onto the inner surface of the inner heating tube whereby there is an immediate combustion to form combustion products. Finally, the system includes an air line connected to the heating tube for directing compressed air through the inner heating tube to mix with the combustion products and transport the formed combustion aerosols out of an outlet end of the inner heating tube.