Which device mixes air and fuel according to the Bernoulli principle?

Which device mixes air and fuel according to the Bernoulli principle?

• A. Carburetor
• B. Injector
• C. Piston
• D. Compressor

Answer: (A)

The correct choice is a carburetor because it is specifically designed to mix air with fuel in internal combustion engines, utilizing the Bernoulli principle. According to this principle, as the speed of a fluid increases, its pressure decreases. In a carburetor, the air flows through a narrow passage, increasing its velocity and reducing its pressure. This drop in pressure allows fuel from the fuel bowl to be drawn into the airstream, achieving the necessary mixture of air and fuel for combustion.

Carburetors can vary in design, but the fundamental operation relies on creating this differential pressure to ensure the proper mixture is supplied to the engine, which is essential for effective combustion and performance. In contrast, injectors atomize fuel directly into the air stream but do so through a different mechanism, typically relying on fuel pressure rather than the Bernoulli principle. A piston is a component of an engine that compresses air and fuel but does not mix them. A compressor increases the pressure of air but does not mix it with fuel. Thus, the carburetor is uniquely suited for mixing air and fuel using the Bernoulli effect.