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Diesel Engine

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					             Diesel Engine

The only difference between diesel engine and a four-stroke
gasoline engine is:
•No sparkplug on Diesel engine.
•Has a higher compression ratio.
  (14:1 to 25:1)
•Better fuel mileage.
            Diesel Engine
Intake Stroke:

•Piston moves from TDC to BDC
 creating vacuum in the cylinder

•Intake valve opens allowing only
 air to enter the cylinder and
 exhaust valve remains closed
              Diesel Engine
Compression Stroke

•Both valves stay closed


•Piston moves from BDC to TDC,
 compressing air to 22:1

•Compressing the air to this extent
 increases the temperature inside the
 cylinder to above 1000 degree F.
              Diesel Engine
Power Stroke

•Both valves stay closed

•When the piston is at the end of
 compression stroke(TDC) the injector
 sprays a mist of diesel fuel into the
 cylinder.

•When hot air mixes with diesel fuel
 an explosion takes place in the cylinder.

•Expanding gases push the piston
 from TDC to BDC
          Diesel Engine
Exhaust Stroke

 •Piston moves from BDC to
  TDC

 •Exhaust valve opens and the
  exhaust gases escape


  •Intake valve remains closed
       Diesel Engine
Four Strokes of Diesel Engine

				
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posted:9/8/2011
language:English
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