working of corburator

Asked by Venkat phy lect | 13th Dec, 2013, 07:56: PM

Expert Answer:

A carburetor consists of a tube with an adjustable plate across it. This plate is called the throttle plate and controls the amount of airflow. A narrowing in the tube is called the venturi, which creates the carburetor's vacuum. Within the vacuum is a jet, which is a hole that allows the vacuum to pull in the fuel.
To understand how a carburetor works, you have to look at Bernoulli's principle. This principle explains that the speed of air affects its pressure. When it moves faster, its pressure is lowered. Some people think the throttle pedal or accelerator controls the flow of fuel when a carburetor is used. Instead, the accelerator starts certain carburetor actions, leading to the measuring of air as it is drawn into the engine.
The speed of the airflow, as regulated by the carburetor, influences the pressure and regulates the amount of fuel that is supplied to the engine's air stream. The job of the carburetor is not at all trivial. If the device fails to get the mix just right, the engine will not run properly. When too little fuel is blended with the air, the engine runs lean, fails to run at all, or suffers damage. When too much fuel is allowed in, the engine floods, wastes fuel, emits too much smoke, or gets bogged down and stalls.

Answered by  | 22nd Dec, 2013, 10:39: PM

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