state stroke odrer of a four stroke, four cylinder, spark ignition engine
1. Intake stroke - The intake valve opens and the piston moves down, drawing air and fuel into the combustion chamber.
2. Compression stroke - Both valves are closed, and the piston moves up, compressing the air and fuel mixture.
3. Power stroke - The spark plug ignites the compressed mixture, causing it to rapidly expand and push the piston down.
4. Exhaust stroke - The exhaust valve opens, and the piston moves up, pushing the burnt gases out of the combustion chamber and into the exhaust system.
The stroke order of a four-stroke, four-cylinder, spark ignition engine is as follows:
1. Intake Stroke: In this stroke, the piston moves downward, away from the cylinder head, creating a vacuum inside the cylinder. The intake valve opens, and a mixture of air and fuel is drawn into the cylinder.
2. Compression Stroke: After the intake stroke, the piston moves upward, compressing the air-fuel mixture. Both the intake and exhaust valves are closed during this stroke.
3. Power Stroke: At the top of the compression stroke, a spark plug ignites the compressed air-fuel mixture. The resulting explosion forces the piston downward with a great amount of pressure. As the piston moves down, it transfers mechanical energy to the crankshaft, which converts it to rotational motion.
4. Exhaust Stroke: Finally, the piston moves back up, expelling the burned exhaust gases from the previous power stroke. The exhaust valve opens, and the piston pushes the gases out of the cylinder and into the exhaust system.
This four-stroke cycle repeats continuously as the engine runs, with each cylinder going through the same sequence of intake, compression, power, and exhaust strokes.