With the help of a well-labeled diagram, describe the working a carburetor 

A carburetor is a device that mixes air and fuel for internal combustion engines in the proper ratio for combustion.

Working of a Carburetor

drawing of carburetor

• Air Intake: Air enters the carburetor through the air filter, which removes any dust or debris.
• Choke Valve: This valve restricts the air intake to enrich the fuel mixture, which is useful for starting a cold engine.
• Venturi: As air passes through the narrow section called the venturi, its speed increases, and pressure decreases, creating a vacuum.
• Fuel Jet: The vacuum draws fuel from the float chamber through the fuel jet into the airstream.
• Throttle Valve: This valve controls the amount of air-fuel mixture entering the engine. When you press the accelerator, the throttle valve opens wider, allowing more mixture to flow in.
• Float Chamber: This chamber maintains a constant level of fuel, ensuring a steady supply to the fuel jet.

Steps in Operation

• Starting: When the engine starts, the choke valve is partially closed to provide a richer fuel mixture.
• Idling: At low speeds, the throttle valve is nearly closed, and the engine runs on a small amount of fuel.
• Acceleration: When you accelerate, the throttle valve opens, allowing more air and fuel to enter the engine.
• Cruising: At steady speeds, the throttle valve maintains a constant position, providing a consistent air-fuel mixture.
• Deceleration: When you decelerate, the throttle valve closes, reducing the air-fuel mixture entering the engine.

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