Stroke
1:
The downward moving piston sucks a mixture of air and petrol vapour into the cylinder through the inlet valve.
The downward moving piston sucks a mixture of air and petrol vapour into the cylinder through the inlet valve.
Stroke
2:
The piston then moves upwards, compressing the gas mixture.
The piston then moves upwards, compressing the gas mixture.
Stroke
3:
Just before the piston reaches the top of the cylinder a spark from the spark plug explodes the gas mixture. The pressure from the rapidly expanding gas pushes the piston down and causes a flywheel that it is connected to by the crankshaft to rotate. It is this rotation that is used to drive the wheels of the car.
Just before the piston reaches the top of the cylinder a spark from the spark plug explodes the gas mixture. The pressure from the rapidly expanding gas pushes the piston down and causes a flywheel that it is connected to by the crankshaft to rotate. It is this rotation that is used to drive the wheels of the car.
Stroke
4:
The piston moves upwards in the cylinder again to push out the gases
through the exhaust valve into the exhaust system of the vehicle. As
the piston moves down, it pulls more fuel/air mixture in to begin the
cycle again.
