What is atomization in relation to carburetors?
Even the earliest Pontiac carburetors had an idle or low-speed circuit and a high-speed or main-metering fuel-delivery path. As the fuel enters the air stream, it is pulled apart and broken into even smaller particles (atomization). This process can be likened to spraying an aerosol can into the atmosphere.
What is used to regulate air flow in a carburetor?
The carburetor has two swiveling valves above and below the venturi. At the top, there’s a valve called the choke that regulates how much air can flow in. If the choke is closed, less air flows down through the pipe and the venturi sucks in more fuel, so the engine gets a fuel-rich mixture.
What causes air to flow through the carburetor?
The air may flow either up or down the venturi, depending on the design of the engine and the carburetor. Due to this low pressure area caused by the piston moving down, the higher pressure air in the atmosphere flows in to fill the low pressure area. As it does, the airflow must pass through the carburetor venturi.
What are the 3 types of carburetors?
There are three general types of carburetors depending on the direction of flow of air.
- Types of Carburetors.
- Constant Choke Carburetor:
- Constant Vacuum Carburetor:
- Multiple Venturi Carburetor:
What is the meaning of atomisation?
Atomization is the process of converting an analyte in solid, liquid or solution form to a free gaseous atom. It is the transformation of a bulk liquid into a spray of liquid droplets in a surrounding gas or vacuum.
Why does gas need to be atomized?
The carburetor’s job is to prepare the gasoline to make that phase change from a liquid to a vapor. If the fuel is not atomized sufficiently, then the other steps cannot take place properly. So first and foremost, the gasoline needs to be broken into small particles.
How do you tell if a carburetor is rich or lean?
This method involves looking at the base of the spark plug insulator (white part of the plug) for a slight coloring on the insulator just above where the insulator comes through the steel case. If the mixture is too lean, it will leave no color, while a rich mixture will cause the fuel ring to become more prominent.
How many circuits does a carburetor have?
In terms of the basic circuits, all carburetors, not just Holleys, utilize the same techniques. The five most basic circuits in the carburetor are the float, idle, main-metering, power-enrichment, and the accelerator-pump circuits.
What are the Jets in a carburetor?
Carburetors contain tiny nozzles—these are the “jets”—that have holes. Fuel passes through these holes to mix with air. This creates mist, which then travels to the combustion chamber, where it’s used as energy to run your engine.
Why must fuel be atomized?
The more surface area, the faster the conversion to gas. As the engine speed increases, the velocity through the intake manifold also goes higher, and more of the fuel is atomized than would be at low speeds. Thus, it’s very important for the fuel to be completely atomized.
What is fuel atomization and how does it work?
Fuel atomization is the process of breaking down liquid fuel into a mist-like spray to prepare it for emulsification, vaporization, and combustion.
Is a carburetor or injector better for fuel atomization?
There was and still is much thought given to injector placement in development, since, in many ways, a carburetor does a better job of atomizing the fuel, and provides a longer path for the emulsification and vaporization steps to occur.
What is the powder size distribution in gas atomisation?
In gas atomisation the powder size distribution strongly depends on the nozzle design (‘free-fall’ configuration or ‘confined’).
What is Ultrasound-assisted atomization and how does it work?
Overall, ultrasound-assisted atomization can improve the process performance significantly, although additional scale up work is required to achieve efficient application on a commercial scale. Atomisation breaks liquid metal into droplets, which then cool to form powder and can be processed further.