What is the working principle of carburetor?

The carburetor works on Bernoulli’s principle: the faster air moves, the lower its static pressure, and higher the dynamic pressure is. The throttle (accelerator) linkage does not directly control the flow of liquid fuel.

What do you know about working principle of carburetor and its types?

Working of a Carburetor:

The Float and needle valve system maintains a constant level of gasoline in the float chamber. If the amount of the fuel in the float chamber falls below the designed level, the float goes down, thereby opening the fuel supply valve and admitting fuel.

What is simple carburetor explain its working?

Working of a simple carburetor:

It keeps atmospheric pressure in the float chamber. Fuel from the external fuel tank is supplied to the float chamber with the help of the fuel pump. This fuel from the fuel tank is filtered using the strainer which removes any solid particles from the fuel.

What is the working principle of a carburetor name the major parts in it?

Carburetor Components – The function of the carburetor is to mix air and fuel ideally at any RPM. In addition, the carburetor is also used to regulate engine RPM and generate a vacuum inside the intake. The working principle of the carburetor is by using a vacuum or air pressure difference in two spaces.

IT IS INTERESTING:  Which type of motor is used in electric train?

What is the function of carburettor?

Carburetor, also spelled carburettor, device for supplying a spark-ignition engine with a mixture of fuel and air. Components of carburetors usually include a storage chamber for liquid fuel, a choke, an idling (or slow-running) jet, a main jet, a venturi-shaped air-flow restriction, and an accelerator pump.

What are the 3 types of carburetors?

There are three general types of carburetors depending on the direction of flow of air.

  • Types of Carburetors.
  • Constant Choke Carburetor:
  • Constant Vacuum Carburetor:
  • Multiple Venturi Carburetor:


What are the defects in simple carburetor?

Limitations of simple carburetor

  • At low speed, the amount of fuel in air-fuel mixture is very low. …
  • It gives stoichiometric mixture only at one specific speed and load. …
  • Fuel economy is very low. …
  • The working of simple carburetor will be affected by the atmospheric pressure.

How do you clean a carburetor?

Directions for How To Clean A Carburetor:

  1. Dilute cleaner. In a large container, mix 1 part Simple Green Pro HD Heavy-Duty Cleaner to 3 parts water.
  2. Clear air filter. …
  3. Remove the carburetor. …
  4. Remove carburetor float. …
  5. Remove other removable components. …
  6. Soak and scrub components. …
  7. Rinse and dry. …
  8. Reassemble and replace.

What are the limitations of carburetor?

Disadvantages of Carburettor:

  • Cannot provide a perfect air-fuel ratio consistently.
  • Cannot control the wastage of fuel effectively.
  • More number of parts in some complex designs which makes diagnosis difficult.
  • Some designs develop the problem of vapour lock resulting in engine stalling.


Where is a carburetor used?

Carburetor prepares a mixture of air and fuel (which is suitable for combustion) for an spark ignition engine. Carburetor is also used to control the speed of the vehicle. It converts petrol into fine droplets and mixes it in air in such away that it burns smoothly in engine, without any problem.

IT IS INTERESTING:  How does a DC motor work in an elevator?

What is rich mixture?

A rich mixture is a fuel/air mixture containing an excessive proportion of fuel. … A rich mixture provides enough fuel to use up all of the oxygen in the cylinder. A rich mixture has too much gasoline and not enough air.

Are carburetors reliable?

Carburetors are precise, but not accurate, in that they cannot account for changes in air or fuel temperature or atmospheric pressure. Cost and complexity. Being purely mechanical devices, carburetors have it hands down over fuel injection with regard to cost and complexity.

What are the three main functions of a carburetor air bleed system?

4)What are the three main functions of a carburetor air bleed system? 1. Air bleed helps provide an even air/fuel ratio as airflow through the carburetor changes(different throttle settings)2. It helps atomize the fuel as it enters the air stream (causes tiny bubbles called emulsions)3.

Why do carburetors go bad?

There are several reasons , Bad gas or old gasoline that has sat in a carb for a while, its turns to varnish and it stinks . Ethanol based fuels are carburetor killers especially in small gas engines that are gravity fed fuel. The ethanol grabs moister from the air all the time, more so in humid areas.

What is difference between fuel injection and carburetor?

Unlike carburetors, a Fuel Injection system is comprised of a complex set of electronics and sensors. In carbureted systems the fuel gets drawn from the tank, while in a Fuel Injected system it depends on a fuel pump installed inside the tank for a fine-grained control over fuel flow.

IT IS INTERESTING:  Frequent question: How does PLC control motor speed?