Ignition system

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Ignition system

  1. 1. Presented byAsheem Kumar PaloCenturion University, INDIA
  2. 2. INTRODUCTIONIgnition systems are mainly of two types;I. Spark ignition systemII. Compression ignition systemAn ignition system obeys laws of conservation of energy.Hence it can be treated as a balance of energy between;i. That provided by an external sourceii. That released by chemical reactioniii. That dissipated to the surroundings as thermal energy
  3. 3. REQUIREMENTS OF AN IGNITION SYSTEMIt should provide a good spark between theelectrodes of the plugs at the correct timingIt should function efficiently over the entire range ofengine speed.It should be light, effective & reliable in service.It should be compact and easy to maintain.It should be cheap and convenient to handle.
  4. 4. TYPES OF IGNITION SYSTEMSThe ignition systems are classified dependingupon how the primary energy for operating thecircuit is made available as:I. Battery Ignition SystemII. Magneto ignition system
  5. 5. Battery Ignition SystemComponents of Battery Ignition Systemo Batteryo Ignition switcho Ballast resistoro Contact breakero Capacitoro Distributor
  6. 6. o Ignition Coil
  7. 7. o Spark Plug
  8. 8. Operation of Battery Ignition Systemcamswitchballast IgnitiondistributorSparkplugcylinderprimary
  9. 9. Magneto Ignition SystemdistributorcoilcamcondenserSpark plugSecondary windingPrimary windingRotating magnetTwo poles shownContact breakerIgnition switch1234
  10. 10. Modern Ignition SystemsI. Capacitive discharge ignition system(CDI system)II. Transistorized coil ignition system(TCI system)
  11. 11. Capacitive discharge ignition system(CDI system)
  12. 12. Transistorized coil ignition system(TCI system)
  13. 13. AdvantagesReduced ignition system maintenanceReduced wear of the componentsIncreased reliabilityExtended spark plug lifeImproved ignition of lean mixture

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