The two-stroke engine is a special kind of internal combustion engine. It completes its power cycle within two power strokes (up and down movement) of the piston throughout its single crankshaft revolution. In this engine, the carburetor blends the air and fuel mixture in the proper ratio and supplies it for combustion. The whole process compiles around the air filter, the carburetor, and the main engine.
Basic function of carburetor
To burn the fuel in the engine, regular supply of the clean air (oxygen) is compulsory. The air filter provides a regular supply of clean air for combustion. It draws air and supplies it to the inlet of the carburetor. It passes through the venture and mixes with the fuel to form vapors (atomization).
Role of Diaphragm in Carburetor
Meanwhile, the diaphragm on the carburetor draws the fuel from the fuel tank. This increases the pressure of the fuel and allows it to come through the jets. During this operation, the diaphragm works in collaboration with the piston. The piston feeds positive and negative pressure to the diaphragm. This process helps the diaphragm to draw the fuel and deliver it to the jets continuously. Here the point of interest is the whole process of drawing and delivering the fuel occurs in seconds.
The flap valve in the fuel suction line allows only suction of the fuel. The increase in pressure in the diaphragm moves the fuel and needle valve allows it to cross through it. The pressure on the upper part of the carburetor opens the needle valve and it allows the high-pressure fuel to pass through it. Through this process, the engine gets the regular supply of fuel for atomization.
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After the atomization of the fuel by carburetor
On the atomization of the air-fuel mixture, it passes across the one-way flap valve and goes to the underside of the piston. Here we get atomized air-fuel mixture with oil to lubricate the engine. Now as the piston moves in the downward direction, it compresses the air fuel mixture and closes the flap valve.
The high-pressure air-fuel mixture needs a way to go and it passes through the transfer port above the piston. The fresh air-fuel mixture pushes the waste mixture through the exhaust valve and takes it place.The piston comes up as per the cycle and with the help of the spark, it again burns the air-fuel mixture. This process goes like way and it all happens in a split of seconds.