Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Battery Ignition System

8,281 views

Published on

Mechanically timed Battery Ignition System

Published in: Automotive
  • Be the first to comment

Battery Ignition System

  1. 1. A SEMINAR ON BATTERY IGNITION SYSTEM
  2. 2. Index Objective Construction Working Advantages Disadvantages Applications Conclusion
  3. 3. Objectives To understand the construction and working of a battery ignition system. To locate and identify parts of a battery ignition system. To know the application, merits and demerits of a battery ignition system.
  4. 4. Construction It consists of the following parts: Battery(Lead Acid type)  Stores the Electrical Energy.  Charges using the Dynamo driven by the engine
  5. 5. Ignition switch  Helps in turning the system ON or OFF
  6. 6. Ballast Resistor  Under prolonged conditions it helps to maintain the temperature of Ignition Coil
  7. 7. Ignition coil  Steps up the Low Voltage to High Voltage to induce an electric spark in the spark plug.
  8. 8. Contact breaker  Making and breaking the primary circuit.
  9. 9. Capacitor  Prevents the burning and possible welding of metal points.
  10. 10. Distributor  Distributes the Ignition surge to individual spark plugs.
  11. 11. Spark plug  Creates the spark due to ionisation of gap
  12. 12. Working Ignition switch is turned on, the current starts flowing through primary circuit. This current sets up a magnetic field around the soft iron core of the ignition coil.  When the breaker points opens, the current which was flowing through the contact breaker starts flowing through the condenser As the condenser charges, the primary current falls and the magnetic field collapses. This change in the magnetic field induces a current in the primary winding which flows in the same direction as the primary current and changes the condenser to a voltage much higher than battery voltage thus stooping the current flow from the battery.
  13. 13. Due to this, the condenser then discharges into the battery, thus reversing the direction of both primary current and magnetic field. This rapid collapse and reversal of the magnetic field induces a very high voltage in the secondary winding of the ignition coil.  This high voltage is then carried through the high tension wires to the distributor rotor, where it passes through one of the ignition harnesses into the spark plug and produces a spark. CONTINUED..
  14. 14. Advantages  Moving parts are absent-so no maintenance.  Contact breaker points are absent-so no arcing.  Spark plug life increases by 50% and they can be used for about 60000 km without any problem.  Better combustion in combustion chamber, about 90-95% of air fuel mixture is burnt compared with 70-75% with conventional ignition system.  More power output.  More fuel efficiency
  15. 15. Disadvantages  Because of arcing, pitting of contact breaker point and which will lead to regular maintenance problems.  Poor starting: After few thousands of kilometres of running, the timing becomes inaccurate, which results into poor starting (Starting trouble).  At very high engine speed, performance is poor because of inertia effects of the moving parts in the system  Sometimes it is not possible to produce spark properly in fouled spark Ignition Systems plugs.
  16. 16. Application  It is used in all S.I. engines used in modern vehicles.  It is used in engines in industries which requires sparking for combustion.
  17. 17. Conclusion Ignition system is very important component of a vehicle. It harnesses the energy of collapsing magnetic field. Condenser is used to create voltage much higher tan the battery voltage.
  18. 18. ANY QUESTIONS?

×