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The four-stroke engine. Spark plug. Exhaust valve. Inlet valve. Cylinder. Piston. The four-stroke engine. Inlet valve open. INDUCTION STROKE. The four-stroke engine. Inlet valve open. INDUCTION STROKE. Piston down. The four-stroke engine. Fuel in. Inlet valve open.
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The four-stroke engine Spark plug Exhaust valve Inlet valve Cylinder Piston
The four-stroke engine Inlet valve open INDUCTION STROKE
The four-stroke engine Inlet valve open INDUCTION STROKE Piston down
The four-stroke engine Fuel in Inlet valve open INDUCTION STROKE Piston down
The four-stroke engine Fuel in Inlet valve open INDUCTION STROKE Piston down
The four-stroke engine Fuel in Inlet valve open INDUCTION STROKE
The four-stroke engine Piston up Inlet valve closed COMPRESSION STROKE
The four-stroke engine Piston up Inlet valve closed COMPRESSION STROKE
The four-stroke engine Piston up Inlet valve closed COMPRESSION STROKE
The four-stroke engine Inlet valve closed BANG POWER STROKE
The four-stroke engine Inlet valve closed Piston down powerfully POWER STROKE
The four-stroke engine Inlet valve closed POWER STROKE Piston down powerfully
The four-stroke engine Inlet valve closed POWER STROKE
The four-stroke engine Inlet valve closed Exhaust valve open EXHAUST STROKE
The four-stroke engine Piston up Inlet valve closed Exhaust valve open Exhaust gases out EXHAUST STROKE
The four-stroke engine Piston up Inlet valve closed Exhaust valve open Exhaust gases out EXHAUST STROKE
The four-stroke engine Inlet valve open Exhaust valve closed INDUCTION STROKE
And so the cycle continues!!