![]() ![]() The fuel jets are much smaller and fuel flow is limited mainly by the fuel's viscosity so that the fuel flow tends to be proportional to the pressure difference. 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, however 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. ![]()
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