four stroke order
1. Intake stroke: The piston moves down and the intake valve opens, allowing a mixture of air and fuel to enter the cylinder.
2. Compression stroke: The piston moves up, compressing the air-fuel mixture in the cylinder. Both the intake and exhaust valves are closed during this stroke.
3. Combustion stroke: The compressed air-fuel mixture is ignited by the spark plug, causing a rapid expansion of gases that pushes the piston down.
4. Exhaust stroke: The piston moves back up, pushing the exhaust gases out of the cylinder through the open exhaust valve. The intake valve remains closed during this stroke.
The four-stroke order refers to the sequence of events in a four-stroke internal combustion engine cycle. The four strokes are intake, compression, power, and exhaust. Here is the step-by-step order:
1. Intake Stroke: The piston moves downward while the intake valve opens, allowing a mixture of air and fuel to enter the combustion chamber. The piston creates a vacuum, drawing in the air-fuel mixture.
2. Compression Stroke: After the intake stroke, the intake valve closes, and the piston moves upward, compressing the air-fuel mixture. This reduces the volume inside the combustion chamber and increases its pressure.
3. Power (Combustion) Stroke: Once the air-fuel mixture is compressed, a spark plug ignites it, causing a controlled explosion. This explosion rapidly expands the gases, forcing the piston back down with great force. This downward movement of the piston is harnessed as power.
4. Exhaust Stroke: As the power stroke completes, the exhaust valve opens, and the piston moves upward once again. This upward movement pushes out the burned gases and residual combustion byproducts from the combustion chamber through the exhaust valve. The leftover energy from the power stroke is used to complete the rotation of the crankshaft.
After the exhaust stroke, the cycle repeats with the intake stroke, and the process continues in a continuous loop as long as the engine is running.