User:Ajay77

Diesel engine:-As is the case of Otto four stroke;this cycle too is completed in four-stroke as follows.

1.Suction stroke:-With the movement of the piston from T.D.C. to B.D.C. during this stroke,the inlet valve opens and the at atmospheric pressure is draw inside the engine cylinder;the exhaust valve however remains closed.

2.Compresssion stroke:-The air at atmospheric pressure during the suction stroke is compressed to high pressure and temperature(to the value of 30 bar and 600°C respectively)as the piston moves from B.D.C. to T.D.C. Both the inlet and exhaust valves do not open during any part of this stroke.

3.Expension or working stroke:-As the piston starts moving from T.D.C. a matered quantity of fuel is injected into the hot compressed air in fine sprays by the fuel injector by it(fuel)starts burning at constant pressure.The fuel is injected at the end of the compression stroke but in actual practice the ignition of the fuel starts before the end of the compression stroke.

4.Exhaust stroke:-The piston from B.D.C. to T.D.C. and the exhaust gases escape to the atmosphere through the exhaust valve.When the piston reaches the T.D.C. the exhaust valve closes and the cycle is completed.

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Name:-Ajay Singh Village:-Tatarpur Post:-Sithal Teh.:-Tijara District:-Alwar State:-Rajasthan Pin Code:-301018 e-mail id ajaytatarpur@yahoo.com