How carborator works in automobiles?

Answer 1

thats easy....a carb mixes right proportions of air and fuel before injecting it into the engine cylinders...in order to generate power

Answer 2

A carburetor is essentially a tube. There is an adjustable plate across the tube called the throttle plate that controls how much air can flow through the tube. At some point in the tube there is a narrowing, called the venturi, and in this narrowing a vacuum is created. In this narrowing there is a hole, called a jet, that lets the vacuum draw in fuel.

The carb is operating "normally" at full throttle. In this case the throttle plate is parallel to the length of the tube, allowing maximum air to flow through the carb. The air flow creates a nice vacuum in the venturi and this vacuum draws in a metered amount of fuel through the jet. One of these screws controls how much fuel flows into the venturi at full throttle.

When the engine is idling, the throttle plate is nearly closed. There is not really enough air flowing through the venturi to create a vacuum. However, on the back side of the throttle plate there is a lot of vacuum (because the throttle plate is restricting the airflow). If a tiny hole is drilled into the side of the carb's tube just behind the throttle plate, fuel can be drawn into the tube by the throttle vacuum. This tiny hole is called the idle jet. The other screw of the pair is labeled "Lo" and it controls the amount of fuel that flows through the idle jet.

Both the Hi and Lo screws are simply needle valves. By turning them you allow more or less fuel to flow past the needle. When you adjust them you are directly controlling how much fuel flows through the idle jet and the main jet.

When the engine is cold and you try to start it, the engine is running at an extremely low RPM. It is also cold, so it needs a very rich mixture to start. This is where the choke plate comes in. When activated, the choke plate completely covers the venturi. If the throttle is wide open and the venturi is covered, the engine's vacuum draws a lot of fuel through the main jet and the idle jet (since the end of the carb's tube is completely covered, all of the engine's vacuum goes into pulling fuel through the jets). Usually this very rich mixture will allow the engine to fire once or twice, or to run very slowly. If you then open the choke plate the engine will start running normally.

Answer 3

Carborator is the heart of the Automobile. It has an inlet and outlet, infact there are two inlets. One inlet pumps in gas and the other filtered air. The filtered air is pumped in through the air screw and the gas through the inlet orifice which admits gas into a chamber. Here the gas and the air mix together. The flow of this mixture is controlled by a butterfly valve which is directly connected to the accelarator. When you pump the accelarator the butterfly valve opens and the mixture goes out through the outlet to the cylinder head from where the valves on the head accoding to timed cycles admits it into the cylinder. From there the Rankine cycle takes over the inlet stroke, the compression stroke, the power stroke and last the exhaustion stroke which makes the fly wheel go and the connecting road the power developed is transmitted to the wheels with some losses at all levels.

Answer 4

A carburetor basically consists of an open pipe, a "throat" or "barrel" through which the air passes into the inlet manifold of the engine. The pipe is in the form of a venturi — it narrows in section and then widens again, causing the airflow to increase in speed in the narrowest part. Below the venturi is a butterfly valve called the throttle — a rotating disc that can be turned end-on to the airflow, so as to hardly restrict the flow at all, or can be rotated so that it (almost) completely blocks the flow of air. This valve controls the flow of air through the carburetor throat and thus the quantity of air/fuel mixture the system will deliver, thereby regulating engine power and speed. The throttle is connected, usually through a cable or a mechanical linkage of rods and joints or rarely by pneumatic link, to the accelerator pedal on a car or the equivalent control on other vehicles or equipment.

Fuel is introduced into the air stream through small holes at the narrowest part of the venturi. Fuel flow in response to a particular pressure drop in the venturi is adjusted by means of precisely-calibrated orifices, referred to as jets, in the fuel path.

Answer 5

yep