The carburetor is responsible for mixing air and fuel.
The carburetor is a part that is part of combustion engines , whose function is to mix air with fuel . The proportions of this mixture are very important so that the engine has sufficient power for proper operation.
Generally, the so-called stoichiometric mixture that responds to the lambda factor is used. These proportions indicate that for every part of fuel, there must be 14.7 parts of air by weight . The mixture in question is made inside the carburetor.
Carburetor operation
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 precise 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, it is called a rich mixture . On the other hand, if the proportion 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 correctly: it can stall, overheat, etc.
The carburetor, which works according to Bernoulli's principle , emerged in the mid- 19th century . Over the years its features were optimized and the device added various accessories. However, with the development of high-displacement motorcycles and automobiles, it fell into disuse and was replaced by injectors that save consumption and offer greater power .
Carburetors are used in combustion engines.
Its parts
It is important to note that every carburetor has a total of seven different parts:
- The body, which is the part of the carburetor into which the others are assembled.
- The vat. It is a tank in which gasoline is found and from there it is absorbed by the chimneys.
- The bell, which is responsible for opening the diffuser.
- The chimneys, which, as we have already explained, are the ducts that interconnect the tank with the diffuser.
- The butterfly, which is a fundamental piece in the operation of the bell.
- The needle. This, among other things, has the main task of allowing the fuel flow to be closed when the vehicle in question is at rest. 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, which is the chimney.
Carburetor types
In addition to the above, we have to point out that there are two types of carburetors:
- The constant vacuum carburetor , 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 a cable that exists in the grip.