Which of the following components is responsible for atomising the fuel in a diesel engine?

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Answer 1

Diesel Engine

In a diesel engine, the component responsible for atomizing the fuel (i.e., breaking it into a fine mist) is the Fuel Injector.

In a diesel engine:

Fuel is injected directly into the combustion chamber at high pressure.
The fuel injector sprays the diesel fuel in the form of tiny droplets (atomization), ensuring better mixing with air and more efficient combustion.
Atomization is critical for proper ignition since diesel engines rely on compression ignition, not spark plugs.

Fuel System

In an engine, fuel reaches the cylinder bore through the following path: Fuel tank > Water separator > Feed pump > Filter > Injection pump > Injector nozzle > Cylinder

Turbocharger

A turbocharger in a diesel engine is a device that increases power and efficiency by compressing intake air before it enters the combustion chamber.
This compressed air, with a higher density of oxygen, allows the engine to burn more fuel, resulting in more power output and improved fuel economy.
The turbocharger uses the energy from the exhaust gases to spin a turbine, which in turn drives a compressor that compresses the intake air.

Carburetor

Diesel engines do not use carburetors. They operate on a compression ignition principle where air is compressed to high pressure and fuel is injected into the compressed air, causing it to ignite.
Instead of a carburetor, diesel engines utilize fuel injection systems, often direct injection (DI) for better fuel efficiency and lower emissions.