Introduction To Carburetor

Carburetor is also called "carburetor". It is a component in the engine used to make fuel and air form a combustible mixture. Simple carburetor is mainly composed of float chamber, metering hole, nozzle, throat, throttle (commonly known as throttle), etc. The part above the throat is called the intake chamber, and the part below the throat is called the mixing chamber.
The air enters the upper part of the throat through the air filter, forming a high-speed airflow at the throat, generating a negative pressure area; the gasoline in the float chamber is ejected from the nozzle through the metering hole under the pressure difference between the float chamber and the throat, and is atomized by the high-speed airflow to form a mixture. The process of forming a combustible mixture begins in the carburetor. During the intake and compression process, the oil droplets continue to evaporate and mix with the air until the end of the compression stroke and the start of ignition; but the atomization degree of gasoline at the throat of the carburetor plays a key role in forming a uniform and good combustible mixture. With the change of engine operating conditions, the carburetor is required to change the concentration and quantity of the combustible mixture accordingly.
The carburetor is equipped with compensation devices for idling, starting, enrichment, acceleration, etc. The types of carburetors are divided into three types according to the air flow mode: updraft, downdraft and parallel suction; according to the number of throats, they are divided into three types: single throat, double throat and triple throat; according to the number of mixing chambers, they are divided into single chamber and double chamber.