Working Principle of Four stroke engine

• All events are completed in four strokes of engine.
• Has valve for controlling inlet and outlet of exhaust gases.
• Opening and closing of valve is controlled by cams, fitted on camshaft.
• The camshaft is driven by crankshaft with the help of suitable gears.
• The camshaft runs at half the speed of crankshaft.

Events in IC Engine

• Air (Charge) is taken in cylinder.
• Charge is compressed in cylinder by the piston.
• If charge is only air, the fuel is injected at the end of compression.
• The charge is ignited at a predetermined time under specified pressure inside the cylinder.
• The power developed is transferred to the crankshaft through the connecting rod.
• Exhaust gas go out the cylinder at a regular interval.