Mechanical Basics

What Is Carburetor?

A Carburetor is a device that sucks the air from the surroundings, fuel from the fuel tank and mixes them in a specific ratio so that the mixture is sucked and used for the engine function. The process of sucking and mixing the air-fuel ratio in a specific ratio according to the condition of the engine function is called Carburetion or Carburetion Process.

Carburetor-Types Of Carburetor, Working, Advantages, and Applications

Let us start the post and read about carburetor and types of carburetor, Carburetor working, advantages and applications.

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The Carburetor is an essential and key role player in every millisecond of engine function (or specifically petrol engine). As we know that the petrol engine is the one that sucks the air-fuel mixture in its intake process so, it can be said that the carburetor is the device that uses only in the petrol engine function and not in the diesel engine function.

What can you learn from this post?

  • Factors That Affect Carburetion
  • Types Of Carburetor
  • Types Of Air-Fuel Mixtures
  • Essential Parts Of Carburetor
  • Working Of Simple Carburetor
  • Advantages Of Carburetor
  • Applications Of Carburetor
  • Conclusion
  • Frequently Asked Questions

Factors That Affect Carburetion:

If we observe the motorcycles carefully, the engine function will not be linear; it will be slow, medium, and sometimes higher than the economy class. The required speeds and modes are achieved by the motorcycles only when the motorcycle carburetor discharges the air-fuel mixture as per the required speed.

So, we can say that the carburetion is affected by few factors, and the factors that affect carburetion are

  • Speed of the Motorcycle Engine (Low, Medium, and High Speeds)
  • Temperature Of The Air That Suck For The Engine Function.
  • The Design Of The Carburetion.
  • The Vaporization Characteristics.

So, these are the factors that affect Carburetion Process.

Types Of Air-Fuel Mixtures:

The motorcycle or petrol engine will be acquiring its different speeds according to the carburetor air-fuel mixture input. The air-fuel mixture is divided into three types according to the speed requirement. They are

  • Stoichiometric Mixture or Chemically Correct Mixture
  • Rich Mixture
  • Lean Mixture

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Types Of Carburetor:

A lot of bikes and even four-wheelers are introducing in the market; lots of upgrades and lots of technology are being reinvented. Similarly, new carburetors are being introduced in the market. Each type of Carburetor may be opted for few features and failed at another so, the different types of carburetor in the market are

  • Constant Vacuum type of  Carburetor
  • Constant Choke type of Carburetor
  • Multi-Venturi type of Carburetor

The types of carburetor do consist of several carburetor brands; we will going to discuss bout these types of carburetor in the upcoming posts.

Essential Parts Of Carburetor:

Every type of Carburetor do consists of few similar and essential parts that perform the required operations so, the essential parts of carburetor are

  • Venturi

The venturi is the narrow path in the tube or pipe that increases the pressure of the air-fuel mixture due to the compression of the molecules.

  • Throttle Valve

The throttle valve is an opening and closing tap that is linked to the accelerator of the motorcycle.

  • Choke

The choke is a valve that allows and restricts the airflow into the carburetor.

  • Float Chamber

The float chamber is a chamber in the fuel tank.

  • Fuel Strainer or Fuel Filter

The fuel strainer or fuel filter is a type of filter that will restrict the dust particles in the fuel to enter into the carburetor.

  • Idling Nozzles

The nozzle is a tube or pipe that will remain idle.

Working Of Simple Carburetor:

The sole and whole aim of the Carburetor is to mix the air-fuel in a respective ratio according to the motion of the motorcycle. So, the carburetor will be linked to the fuel tank whereas; the fuel can be taken into the carburetor for mixing.

The carburetor will suck the surrounding air and the fuel into it. Before observing and mixing, this air and fuel are filtered using strainers so, any dust particles will not be stuck and disturb the process or flow. The choke valve is opened freely for allowing airflow.

A venturi or narrow path is designed in the Carburetor so, the air-fuel mixture flow can be increased according to the process. The throttle valve is linked or connected to the accelerator of the motorcycle or four-wheeler.

Carburetor-Types Of Carburetor, Working, Advantages, and Applications

If the vehicle is accelerated, the throttle valve will be opened and allows the air-fuel mixture into the engine. As much as we accelerate, the throttle valve will open and allows a more quantity of the air-fuel mixture into the engine. So, the amount of air-fuel mixing depends upon the acceleration and accelerator.

Once the mixture is ready, the inlet ports or valves of the engine will be open and sucks the air-fuel mixture into the engine which we called the process as Suction or Intake Process. At the time of the suction process, the piston in the engine will be at the bottom dead center (BDC).

Advantages Of Carburetor:

The advantages of Carburetor and types of carburetor are as follows

  • The main advantage of Carburetor is that it will help the motorcycles and wheelers to supply the air-fuel mixture in correct ratio according to the situation.
  • It will not allow the dust particles to enter the engine.
  • The choke in the carburetor will help the engine to start in critical conditions like cold weather.

Applications Of Carburetor:

The applications of Carburetor and its types are as follows

  • The applications of Carburetor mainly found in Automobiles like Motorcycles, cars, etc.
  • The Carburetor also uses in many machines those works under petrol engines.


The Carburetor and types of carburetors are one of the essential components of a petrol engine. We cannot imagine a petrol engine functioning without a carburetor. For suppose, an engine is running at 1000 rpm (revolutions per minute), then the time taken by the carburetor to mix the air and fuel will be in milliseconds.

Similarly, if the engine speed is increased to 3000 rpm (revolutions per minute) then the time of mixing the air-fuel by carburetor will be decreased by 3 times that of 1000 rpm. So, the faster the carburetor works, the faster the engine function and motorcycle run. So, this example will explain the air-fuel mixing time and how fast the carburetor will work

Frequently Asked Questions:

The Carburetor is a device that uses in the bike to mix the air and fuel in correct mixture for engine working. The carburetor is an essential part that will mixes the air and fuel that required in the petrol engine.

The types of carburetor are

  • Constant Volume Carburetor type
  • Multi-Venturi Carburetor type
  • Constant Choke Carburetor type

The essential parts of a Carburetor are

  • Choke
  • Idling Nozzle
  • Throttle Valve
  • Float Chamber
  • Venturi
  • Fuel Filter

In the petrol engine, the air-fuel mixture is taken into the cylinder for its suction process which require a carburetor whereas; only air is sucked into the diesel engine for its suction process which does not require any device or component for mixing the fuels.

So, the Carburetor is used only for petrol engine and not for diesel engine.

The throttle valve in the Carburetor is the valve that allows and restricts the air-fuel mixture into the cylinder.

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