how a carburetor works? Animation video

The

carburetor

is used to mix gasoline into the intake air flow with the ideal volume and proper timing, but how does it work? The

carburetor

works

by using pressure differences when air flows, the air pressure is less than atmospheric pressure. This is called Bernoulli's principle. This principle states that the faster the airflow, the lower the air pressure. Due to this pressure drop, fuel can be sucked into the airstream, but to get faster airflow we need to add a venturi. in the middle of the air hose. The venturi is a section of the air hose. with a smaller diameter, its function is to accelerate the air flow, so, according to Bernoulli's law, the air pressure can be even lower, which makes the fuel more easily sucked into the air flow. air, so the carburetor uses the Bernoulli principle to mix gasoline with the air stream towards the intake manifold.

But how does the carburetor control engine rpm? See the anatomy of this carburetor. This is such a variable venturi carburetor. Controlling the rpm is done by adjusting the width of the venturi, so before continuing we must know some important parts of this carburetor. First, the piston functions to regulate the width of the main jet of the venturi. It is used to distribute fuel into the idle air channel of the venturi. It is an additional channel to flow air at rpm. Pilot jet functions to distribute fuel to the idle air channel. The last one is a needle jet, this is a pointed needle that adjusts the width of the main jet according to the position of the piston, so that when the engine is idle, the piston is in the lowest position, which makes the the venturi is very narrow and the main jet is also covered by a needle jet, this condition forces air to flow through the idle air channel and fuel through the pilot jet when we pull the rpm handle, the piston The venturi and fuel are also drawn in through the main jet.

The higher the position of the piston, the wider the venturi. , the wider the venturi will be, the greater the airflow will be and as a result, the faster the engine rpm will be, so we know that the fuel tank is higher than the carburetor, why not the fuel? t overflow apparently there is a float system that prevents the fuel from overflowing. This system only uses the movement of the float to shut off the fuel from the tank, so when the fuel in the float chamber is empty, the float lowers and the float needle opens. makes the gasoline fill the float chamber when the gasoline is full the float rises and the needle also closes the fuel so there is no fuel flow to the flow chamber makes the gasoline not overflow when the gasoline in the chamber of the float decreases the float drops and the gasoline returns to fill the float chamber and the last thing to be confused with the screws on the side of the carburetor.

The screws are used to control the idle rpm. First, the idle air screw is used to adjust the width of the idle air channel. so when tightened the idle air channel becomes narrower so less air passes through the second piston screw, it will adjust the height of the piston when idle, if tightened the piston lifts up and makes it flow more air through venturi, hopefully helpful and please subscribe. for more