Engine Conctruction and Principles of Operation by iqbiU0h7

VIEWS: 4 PAGES: 9

									                              Small Engine                     Ch 9
                            Ignition Systems

Chapter Objectives - Upon completion of this chapter you should be able to:
     Explain theory of operation of ignition systems.
     I.D. the components of an ignition system and
      understand the function of each.
     Perform ignition system installations and adjustments.
     Explain sparkplug identification and construction.
     Explain the differences between a Magneto Ignition
      System and a Battery Coil Ignition System.
     Troubleshoot common ignition system problems and
      perform common repairs.
                     Small Engine         Ch 9
                   Ignition Systems

The primary function of
an ignition system is to:

Provide a properly
timed spark in the
combustion chamber of
the engine that will
ignite the air-fuel         Points open

mixture from the
carburetor.
                         Small Engine                   Ch 9
                       Ignition Systems




                              Point gap effects spark timing and
                                     Voltage Magnitude



Condenser Absorbs current
flow to reduce point arcing
                       Small Engine                Ch 9
                     Ignition Systems


Electromagnetic Induction




                            The Coil is a Step up Transformer
                 Small Engine     Ch 9
               Ignition Systems
        Spark Plug ID




Ribs Prevent
 Flashover
                        Small Engine             Ch 9
                      Ignition Systems
                                  Gapping sparkplugs




Selecting proper plug reach
      Small Engine                  Ch 9
    Ignition Systems

Determine proper Air Fuel Ratio under load
         by sparkplug coloration


       Photo of
       Spark Plug
       Colors
         Small Engine                   Ch 9
       Ignition Systems
Transistor Controlled Ignition System

              TCI
    Small Engine               Ch 9
  Ignition Systems
Battery Coil Ignition System

								
To top