The main disadvantage of basing a carburetor's operation on Bernoulli's Principle is that being a fluid dynamic device, the pressure reduction in a venturi tends to be proportional to the square of the intake airspeed. Instead, the airflow through the carburetor increases, which in turn increases the amount of fuel drawn into the intake mixture.

In most cases (except for the accelerator pump), the driver pressing the throttle pedal does not directly increase the fuel entering the engine.

The carburetor works on Bernoulli's principle: the static pressure of the intake air reduces at higher speeds, drawing more fuel into the airstream. Most engines use a single carburetor shared between all of the cylinders, though some high-performance engines have used multiple carburetors. Air from the atmosphere enters the carburetor (usually via an air cleaner), has fuel added within the carburetor, passes through the inlet valve(s) and then enters the combustion chamber. The carburetor is located upstream of the inlet manifold. Operating principle ġ979 Evinrude Type I side draft carburetor Colloquial abbreviations include carb in the UK and North America or Carby in Australia. The name is spelled 'carburetor' in American English and 'carburettor' in British English. Thus a carburetor mixes intake air with hydrocarbon-based fuel, such as petrol or AutoGas (LPG). The name 'carburetor' is derived from the verb carburet, which means 'to combine with carbon', or, in particular, 'to enrich a gas by combining it with carbon or hydrocarbons'. Diesel engines have always used fuel injection instead of carburetors. lawnmowers, generators and concrete mixers) and motorcycles. Since the 1990s, carburetors have been largely replaced by fuel injection for cars and trucks, but carburetors are still used by some small engines (e.g.

The primary method of adding fuel to the intake air is through the Venturi tube in the main metering circuit, though various other components are also used to provide extra fuel or air in specific circumstances. A carburetor (also spelled carburettor or carburetter) is a device used by an internal combustion engine to control and mix air and fuel entering the engine.

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