kaasuttimista

A carburetor is a device that mixes air and fuel in the correct ratio for combustion in an internal combustion engine. It achieves this by using the Venturi effect, where a constriction in the airflow causes the air velocity to increase and its pressure to drop. This low-pressure area draws fuel from a reservoir (the float bowl) through a jet. The fuel then atomizes and mixes with the incoming air before entering the engine's intake manifold.

Carburetors control the amount of air-fuel mixture entering the engine through a throttle valve, which is connected to the accelerator pedal or lever. As the throttle opens, more air-fuel mixture enters, increasing engine speed and power. Different types of carburetors exist, varying in complexity and the number of barrels (passages for air and fuel). Common types include simple downdraft, sidedraft, and multi-barrel designs.

The fuel mixture is regulated by jets, which are precisely sized orifices that control the flow of fuel. The float bowl maintains a constant level of fuel, ensuring a consistent supply to the jets. Modern vehicles have largely replaced carburetors with fuel injection systems, which offer greater precision, efficiency, and emissions control. However, carburetors remain common in older vehicles, motorcycles, small engines, and some specialized applications due to their simplicity and cost-effectiveness.