Kaasuttimilla

Kaasuttimilla, known in English as carburetors, are mechanical devices used in internal combustion engines to mix air and fuel in the correct proportion for combustion. They were the primary fuel delivery system for gasoline engines for many decades, predating modern fuel injection systems. A carburetor works by drawing air through a venturi, a narrowed section of the carburetor barrel. As air passes through the venturi, its speed increases, and its pressure decreases, creating a vacuum. This vacuum draws fuel from a fuel bowl, which is kept at a constant level by a float mechanism, through a jet and into the airstream. The mixture then travels into the engine's intake manifold and cylinders. The amount of fuel delivered is controlled by a throttle plate, which regulates the airflow, and thus the vacuum, into the carburetor. Different jets and adjustments allow for tuning the air-fuel mixture to suit various engine operating conditions, such as idling, acceleration, and full throttle. While largely replaced by more efficient and precise fuel injection systems in modern vehicles, carburetors are still found in many smaller engines, such as those in motorcycles, lawnmowers, and older or classic cars. Their relative simplicity and lower manufacturing cost contribute to their continued use in specific applications.