Question
Download Solution PDFA four-stroke engine produces one power stroke in ________ revolutions of the crankshaft.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFour-stroke engine:
- To produce power in a four-stroke engine the following operations take place in the sequence given.
- In this type of engine, one power stroke is obtained in two revolutions of the crankshaft.
- The piston moves from TDC to BDC.
- A vacuum is created inside the cylinder.
- The inlet valve opens while the exhaust valve remains closed.
- The charge air enters into the cylinder,
- The inlet and exhaust valves are closed.
- The piston moves from BDC to TDC.
- The charge air is compressed in the cylinder & air pressure and temperature is increased.
- At the end of the compression stroke diesel fuel is injected into the hot compressed air in the combustion chamber; result burning of diesel with an explosion the gas expand and pressure develops inside the cylinder.
- The piston moves from TDC to BDC.
- Both the valves remain closed. Power is supplied to the fly wheel.
- The inlet valve remains in closed position.
- The exhaust valve opens, the piston moves from BDC to TDC due to the energy stored in the flywheel.
- The burnt gases inside the cylinder go out through the exhaust valves.
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