How to Clean and Adjust Carburetor

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The carburetor is the device that provides the gas-air mixture that will burn in the cylinders of the engine in internal combustion engines.
The air absorbed by the suction power of the pistons in the cylinder passes through the carburetor, dragging some gasoline along with it, and evaporates it, and the gas mixture formed enters the cylinders and is ignited by the spark from the spark plugs. The carburetor automatically adjusts the air to be sucked in and the ratio of the gasoline to mix with additional devices.
Working method and structure:
The carburetor simply consists of a narrowing of the air in the middle section and the gas chamber connected to this pipe by several thin channels. The air pipe is called the throat and the narrowing part of the throat is called venturi. The air sucked into the engine gains speed as it passes through the venturi according to the physics rules and creates low pressure in this section. The low pressure (vacuum) created enables the fuel in the gasoline chamber to be sucked and mixed with air and travel towards the cylinder or cylinders. Therefore, the main fuel channel opens to the venturi. The throttle has a throttle for adjusting the amount of air to be fed into the engine, and thus the amount of air-fuel mixture, in the section after the venturi according to the direction of air flow. The throttle works by the movement of the gas pedal in cars. The driver actually increases the clearance of the throttle by pressing the accelerator pedal. Gasoline is either sent to the reservoir in the carburetor by a gas pump or it fills with its own weight, as in some motorcycles. There is a float valve here to keep the amount of gasoline in the reservoir at a constant level. Modern carburetors are equipped with many complex systems in order to ensure that the gasoline engines used in motor vehicles and other areas can operate at desired power and speed according to changing conditions. Since the core masses and other physical properties of gas and air are different, the quantity and ratio of the air-fuel mixture cannot be controlled only with the throttle. Despite the many systems developed, it has been understood that the carburetors will not be able to get excellent efficiency and fuel injection system has taken its place in most modern vehicles today.
Varieties:
1. Carburetors are of two types according to the air flow direction:
a) Vertical flow carburettors. Used in standard cars. The throat is in a vertical position. The fuel tank is located on the side of the throat. Often there is an air filter at the top and an intake manifold at the bottom. Some models with air flow direction from bottom to top have also been used in aircraft engines.
b) Horizontal flow carburetors. It is used in motorcycles. In addition, this type of carburetor is preferred in machines such as small generator, lawn mower, chainsaw and spraying engine. The throat is in a horizontal position and the gas chamber is at the bottom of the throat. Instead of the throttle, there may be a gas piston performing the same job. Since they can be attached directly to the cylinder head without the intake manifold, it has also been used in some sports cars, one for each cylinder.
2. There are two types of carburetors according to the number of throats:
a) Single throat carburetor. In cars, when it is desired to exceed a certain speed; When it is necessary to go uphill or in cases requiring extra force like this, the amount of gas in the mixture should be increased together with the amount of air - fuel entering the engine. For this, in single throat carburetors, with the throttle opening by 3/4, more gas flows into the throat through a second channel. In multi-throat carburetors, there is a second throat that comes into play here.
b) Multi-throat carburetors. The number of throat can be 2, 4, 6 or more. In motorcycles and multi-cylinder racing vehicles, carburetors are used, which are usually manufactured with one throat per cylinder. In these, all gas butterflies operate simultaneously. However, in carburetors used in standard cars, half of the throats are engaged only when a high amount of power is required, that is, in the last quarter of the accelerator.
Engine body
Cylinder head, Engine, Cylinder head gasket, Cylinder liner
Crank system
Piston, Piston ring, Piston pin, Connecting rod, Crankshaft, Crankshaft bearing, Flywheel
Timing system
Camshaft, Timing Belt, Engine valve, Rocker Arm
Gasoline engine fuel system
Air filter, Carburetor, Fuel injection, Gas filter, Intake manifold
Diesel engine fuel system
Fuel tank, Fuel feed pump, Diesel filter, Injection pump, Common rail, Combustion chamber, Diesel injector
Gasoline engine ignition system
Accumulator, Induction coil, Distributor, Spark Plug
Electric system
Alternator, Accumulator, Charger, Starter motor, Ignition key
Lubrication system
Oil pump, Crankcase, Oil filter, Oil cooler, Engine oil
Cooling system
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