A Complete Process of a 4 Stroke Cycle In An Internal Combustion Engine

Now, before you understand this cycle. A car engine is a mechanical, electronic and chemical engineered system, meaning every single part is needed for it's complete smooth functioning and performance. This cycle was invented By Nikolaus A. Otto a German engineer in 1876 and was known as the Otto Cycle

#Fisrt Stroke INDUCTION / INTAKE The inlet valve is open (Caused by the kick starter connected to the flywheel to the crankshaft and camshaft linked to the tappets and push rods. Systematically balancing the timing of the inlet and outlet valves) and the piston is descending in the cylinder, a charge ( A mixture of fuel and air ) is being induced in the cylinder by virtue of the fact that pressure in the cylinder behind the descending piston is reduced slightly below that in the induction manifold. The pressure in the cylinder may still remain constant during this stroke.

#Second stroke COMPRESSION The piston is returning up in the cylinder and both valves are closed. The charge is being compressed , the pressure now increase as the piston rises and the volume decreases.

#Third Stroke EXPANSION The charge is ignited by the spark plug and an explosive combust energy is form that gives a strong pressure due to the heating of the gases pushing the piston down. The pressure of the Burning gases decrease as the piston descent and the burning gases expand. Both valves are still closed.

#Fouth Stroke EXHAUST The exhaust valve is open and the piston is returning up into the cylinder, in which the pressure is now just above that of the atmosphere, and assumed constant. The blunt charge is been pushed out through the exhaust manifold. The stroke is complete. The engine is ready to take back the cycle as mention above. Please leave comments base on your thoughts understanding and questions.