PRINCIPLES OF CARBURETION
OBJECTIVE: Describe the operating systems and principles of a simple carburetor and a
computerized controlled carburetor. Identify the different carburetor accessories and
their functions. Identify and describe possible carburetor troubles and quick system
of carburetion are presented so you may better understand the inner workings of a
carburetor and how the other components of the fuel system function to provide a
combustible mixture or air and fuel to the engine cylinders.
composed of various gases, mostly nitrogen and oxygen (78 percent nitrogen and 21 percent
oxygen by volume). These gases are, in turn, made up of tiny particles called molecules.
All substances, whether solid, liquid, or gas, are made up of molecules. In solids, such
as ice or iron, the particles are held closely together so that they seem to have no
motion. In liquids, the molecules are not held together tightly, so they can move freely
with respect to each other. In gases, there is still less tendency for the molecules to
bond; therefore, the molecules can move quite freely. The molecules of gas are attracted
to the earth by gravity or by their weight. It is the combined weight of the countless
molecules in the air that make up atmospheric pressure.