What is venturi in a car?

Question

where does it exist in an IC engine and why is it requied?

Answer 1

Hi, so first of all, you must know the process of venturi and then you will be able to situate it in an IC(Internal combustion engine).

Venturi is directly associated to Bernoulli’s principle which applies in nozzles, where flow accelerates and pressure drops as the tube diameter is reduced. It is also the principle behind orifice or Venturi flow meters.

Carburetors in IC engines pull fuel into the airflow using a principle called Bernoulli’s effect. A carburetor has such a passageway, called a venturi, in its throat.The venturi is a narrowing of the carburetor’s throat and makes the throat look a little like an hourglass—narrow in the middle and wider at the ends. Air rushing through the narrow part speeds up. At the same time, air pressure against the sides of the passageway decreases, creating a partial vacuum inside the throat. This partial vacuum draws fuel through the nozzle and into the air.
In addition to the main nozzle in the venturi portion of the carburetor, two other nozzles, or ports, deliver fuel to the engine. The idle port is located below the venturi and allows the engine to get fuel when airflow through the carburetor is minimal, such as when the engine is idling at a low speed. An off-idle or transfer port located just above the idle port delivers additional fuel at low engine speeds. Fuel from these two ports is drawn into the cylinders by engine vacuum. The two ports supply enough fuel to keep the engine running at slow speeds. Fuel from the main nozzle is necessary to run the engine at normal operating speeds.

Hope that these references will help you understanding the meaning and use of venturi in internal combustion engine.

Answer 2

Its what sprays fuel into a mist ,It's usually located in a carburetor.(think of it as how a perfume sprayer works) It does that in order for the fuel to ignite in a more uniform way than if it was in a liquid form.

Answer 3

It is the tiny tube in the carburettor which sprays the fuel/air mixture.

Answer 4

in a carb