The carburetor is a piece that is part of internal combustion engines, whose function is to mix the air with fuel. The proportions of this mixture are very important for the engine to have enough power for proper operation.
In general, the so-called stoichiometric mixture that responds to the lambda factor is used. These proportions indicate that, for each part of fuel, there should be 14.7 parts of air by weight. The mixture in question is made inside the carburetor.
In addition to the sector where the mixture is produced, the carburetor has another section that is intended for fuel storage. The storage level is accurate and must not exceed the level of the tank (the outlet opening). The mixing section and the storage section are linked through the nozzle.
When the proportions are less than 10 parts of air for each part of fuel, we speak of a rich mixture. On the other hand, if the ratio is more than 17 parts of air for each part of fuel, it is a lean mixture. In both cases the engine will not work properly: it can stall, overheat, etc.
According to DigoPaul, the carburetor, which works according to the Bernoulli principle, emerged in the middle of the 19th century. Over the years, its features were optimized and the device added various accessories. However, with the development of motorcycles and high-displacement automobiles, it fell into disuse and was replaced by injectors that save fuel consumption and offer greater power.
It is important to note that every carburetor has a total of seven differentiated parts, such as the following:
-The body, which is the part of the carburetor in which the others that give shape to it are assembled.
-The vat. It is a tank in which the gasoline is located and from there it is absorbed by the chimneys.
-The hood, which is responsible for opening the diffuser.
-The chimneys, which, as we have already explained, are the conduits that interconnect what is the tank with the diffuser.
-The butterfly, which is a fundamental piece in the operation of the hood.
-The needle. This, among other things, has the main task of allowing that when the vehicle in question is at rest, the passage of what is fuel, gasoline, is closed. It is cone-shaped and is located in the main chimney.
-The jet, which is screw-shaped and is responsible for limiting the maximum flow of gasoline for what is the chimney.
In addition to the above, we have to point out that there are two fundamental types of carburettors:
-The constant vacuum carburettor, which is appropriate for four-stroke engines. It is identified because the throttle valve is controlled by the throttle grip.
-The direct action carburetor, where the bell is started directly by means of a cable that exists in the aforementioned grip.