ABC's of Carburetion



	THE CARBURETOR'S JOB Continued

	ATOMIZATION Spray of line particles great air contact

	ATOMIZATION "Atomization" simply means breaking the liquid fuel up into very small particles, so that it can more easily vaporize and mix with the air. With the fuel broken into small particles, there is much more chance for air contact; the more air contact, the better the vaporization. METERING Another "must" for good combustion is a correct mixture ratio between the fuel and air, commonly called the "air-fuel ratio." To release all possible energy by combustion, a given amount of fuel must be mixed with a	given amount of air. The metering job of the carburetor is to furnish the proper air-fuel ratio for various conditions, so that engine operation will be neither too lean for power requirements nor too rich for economy. DISTRIBUTION For good combustion and smooth, even operation, the air and fuel must be thoroughly and uniformly mixed, delivered in equal quantities to each cylinder and evenly distributed within the combustion chamber. The carburetor must furnish a properly distributed mixture to the intake manifold; from that point on, distribution depends mostly on engine design.

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