presentation on Diseal engine

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working, efficiency, diseal vs gasoline

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presentation on Diseal engine

  1. 1. Introduction Diesel Engine
  2. 2. Brief History  In 18th century gasoline and steam engines have low efficiency.  Low efficiency in these engines inspired Rudolf to make engine with high efficiency.  In 1878, Rudolf diesel invented the compression-ignition engine.  By 1893 Diesel had obtained a patent for his engine what we know called the diesel engine.
  3. 3. Types of Diesel Engine • Two Stroke • Four Stroke
  4. 4. Working (Two Stroke)  When the piston is at BDC, it uncovers the air intake valves. Air fills in the cylinder. Piston compresses the air. Diesel fuel is sprayed into the cylinder, it ignites. This is the compression stroke.  The pressure created by the combustion of the fuel drives the piston downward. This is the power stroke.  As the piston nears the bottom of its stroke, all of the exhaust valves open. Exhaust gases rush out of the cylinder. Engine Demo
  5. 5. Working(Four Strokes)  Intake stroke: Intake valves open letting in air moving the piston down.  Compression stroke: Piston moves back & compresses air.  Combustion stroke: As the piston reaches the top, fuel is injected at the right time, ignited, forces the piston move back.  Exhaust stroke: Piston moves back to the top, pushing out the exhaust created from the combustion out of the exhaust value. Engine Demo
  6. 6. Two Stroke V/S Four Stroke Two Stroke Four Stroke • Two stroke engines has to make one revolution to produce a power stroke. This gives two stroke engine more power. • More polluting. • Fuel efficiency is less. • Four stroke engines has to make two revolutions to produce power stroke. • Less polluting. • Fuel efficiency is more.
  7. 7. Diesel Engine V/S Gasoline Engine Diesel Engine Gasoline Engine • The air is compressed first, and then the fuel is injected. • Fuel is mixed with air, compressed by pistons and ignited by sparks from spark plugs. • Has spark plug for ignition. • Has no spark plug combustion is due to the heat of compressed air. • High compression ratio. • Produce more noise pollution. • Gives maximum 35-40% efficiency. • Low compression ratio. • Produces less noise pollution. • Gives mximum25% efficiency.

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