Simple Carburettor and Auxiliary Circuits - S.I. Engines - Internal Combustion Engines

TL;DR

Carburetors are essential in engines as they supply a pre-mixed air fuel mixture, but they have limitations such as ice formation, vapor locking, backfiring, and non-uniform fuel distribution.

Transcript

hello everyone welcome back so last time we have seen what is an aero fuel mixture how why is it required what are the limits of the air fuel mixture that are permissible to be inducted inside the combustion chamber and what are the different requirements of the air fuel mixture when the engine is operating under different riding conditions so that... Read More

Key Insights

• 🖐️ Carburetors play a crucial role in supplying the air fuel mixture to the combustion chamber of an engine.
• 💦 The design of a carburetor involves creating a drop in pressure to atomize the fuel and mix it with the incoming air.
• 🥳 Different driving conditions require different air fuel ratios, which can be achieved through various mechanisms in the carburetor.

Questions & Answers

Q: What is the main function of a carburetor?

The main function of a carburetor is to supply a pre-mixed air fuel mixture, also known as charge, to the combustion chamber of an engine.

Q: How does a carburetor create an air fuel mixture?

By creating a drop in pressure, the carburetor causes the liquid fuel to expand and atomize into a spray, allowing for better mixing with the incoming air.

Q: How does a carburetor handle different driving conditions?

A carburetor can adjust the air fuel mixture through mechanisms like idling screws, venturis, and acceleration pumps, ensuring the correct ratio for idle, partial load, and full load conditions.

Q: What are some drawbacks of carburetor systems?

Carburetors are prone to ice formation, vapor locking, backfiring, and non-uniform distribution of fuel air mixture in multi-cylinder engines.

Summary & Key Takeaways

• A carburetor is responsible for forming the air fuel mixture required for combustion in engines.

• The carburetor operates by creating a drop in pressure, which causes the liquid fuel to expand and convert into a spray or mist.

• Different driving conditions require different air fuel ratios, which can be achieved through the use of idling screws, venturi, and acceleration pumps.