Engine Basics

							Supreme Power
Engine Basics



       The
four cycle engine
Engine Operation
 The Otto Cycle engine
       Properties of Combustion

Air


Fuel


Spark/heat
source
Intake Stroke
    -As the piston descends
    vacuum is created
    drawing in fuel and air

    -Air and fuel are mixed
    by carb or via injector
    and throttle body
Air/Fuel Mixture
Intake Stroke

     -Atomized fuel enters the
     combustion chamber
     via the intake valve the
     exhaust valve remains
     closed
        Compression Stroke

As the piston returns to top of cylinder or
Top Dead Center the atomized fuel/air
mixture is compressed
Both the intake and exhaust valves are held
shut to increase pressure
Power Stroke
       As the piston returns to
       the top an electronically
       fired spark ignites the
       air/fuel mixture

       The resulting explosion
       creates pressure and
       forces the piston down
       to Bottom Dead
       Center
          Exhaust Stroke

As the piston returns to Top Dead Center the
exhaust valve opens allowing the burnt fuel
to vent into the exhaust system
              Engine Timing

The entire cycle take
two revolutions of the
Crankshaft
Timing is controlled by
chain, belt or gears
              Four Cycles in Motion
  Intake


Compression


  Power


  Exhaust
              Four Cycles in Motion
  Intake


Compression


  Power


  Exhaust
Linear Motion into Rotational
           Force
Other Engine Types
Other Engine Types Continued
           Internet Sources




From:
http://science.howstuffworks.com/engine.htm
         Internet Sources




From http://www.autoshop-
online.com/auto101/eng1.html
       Video Internet Sources
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