During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber,
During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, it is known as the Compression Stroke. This stroke is one of the four strokes in the four-stroke combustion cycle that takes place inside the engine.
To understand this process, let's break it down step by step:
1. Intake Stroke: During this stroke, the piston moves downward, creating suction in the combustion chamber. The intake valve opens, and the fuel-air mixture from the intake manifold enters the combustion chamber.
2. Compression Stroke: After the intake stroke, the piston starts moving upwards, which compresses the fuel-air mixture inside the combustion chamber. Both the intake and exhaust valves are closed during this stroke to prevent any leakage.
3. Power Stroke: Once the compression stroke is complete, the spark plug fires, igniting the compressed fuel-air mixture. This combustion creates a rapid expansion of gases, which pushes the piston downward, generating power to rotate the crankshaft.
4. Exhaust Stroke: As the piston reaches the bottom of the power stroke, the exhaust valve opens, and the waste gases from the combustion process are expelled out through the exhaust manifold. The piston then starts moving upwards again, pushing the remaining exhaust gases out of the cylinder.
To answer the initial question, the stage when the piston rises and compresses the fuel in the combustion chamber is specifically referred to as the Compression Stroke.