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Ignition System Requirements

 

Ignition System performance. Prevent calibration errors that may interfere with the proper operation of the Ignition System To accomplish these objectives, this manual provides the following:. A description of the components, features and requirements of the Ignition System offered by Delphi E&C. An Ignition Interlock Limited License permits an individual, if certain requirements are met, to operate a motor vehicle(s) equipped with an Ignition Interlock system during the term, or part of the term, of their suspension or revocation.

Ignition System Requirements

Ignition System

For burning any fuel we need two things. First is oxygen and second is heat.

Ignition System Requirements
  • In addition to staying below the arcing voltage, the ignition system keep the voltage across the points below the breakdown voltage for an air gap to prevent a glow discharge across the points. Such a glow discharge would quickly transition to an arc, and the arc would prevent the spark plug from firing.
  • The MSD Power Grid Ignition System is an upgraded version of the Programmable 7-Series Ignitions and consists of a central controller and an ignition that is compatible with all MSD boxes, but is specifically designed for use on the Power Grid-7 box.
  • Inspect the ignition system whenever you make a general under-bonnet check. It takes only a couple of minutes, and guards against a frequent cause of breakdown. Check that the low-tension connections are tight and free from corrosion, and that all LT wires have sound insulation and no cracks, kinks or breaks. Follow with the plug leads and plugs.

Fuels which has self ignition temperature can even be burnt with applying high pressure, like Diesel. But the case of petrol or gasoline is different.

In a spark ignition engines, compression ratio is lower, and self ignition temperature of petrol is higher. Hence to ignite the mixture for the initiation of combustion an ignition system is must.

Requirements of an ignition system

  1. It should provide good spark at correct timing.
  2. It should function efficiently for all engine speeds.
  3. It should be light, effective and reliable in service.
  4. It should be compact and easy to maintain.
  5. It should be cheap and convenient to handle.
  6. The magnetic field generated from the voltage source of the ignition system should not affect radio and television inside the automobile.

There are basically two types of ignition systems are used in automobiles. One is battery ignition system and another one is magneto ignition system.

Lets first discuss battery ignition system

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Battery Ignition System

In a battery ignition system, a battery is used as a source of energy for the spark plug. This battery is rechargeable and derives energy for its recharging from an alternator.

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This alternator is connected from the crankshaft of the engine and converts its mechanical energy into electrical energy.

Ignition System Requirements

Essential components of battery ignition system

  1. Battery
  2. Ignition switch
  3. Ballast resistor
  4. Ignition Coil
  5. Contact breaker
  6. Capacitor
  7. Distributor
  8. Spark plug

Characteristics battery ignition system

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  1. Battery is necessary. Difficult to start the engine when battery is discharged.
  2. Maintenance problem is more due to battery.
  3. Power for ignition is obtained from the battery.
  4. Good spark is available, even at low engine speed.
  5. As engine speed increases, efficiency of battery ignition system decreases.
  6. Occupies more space.
  7. Commonly employed in cars and light commercial vehicles.

Magneto ignition system

A magneto ignition system uses its own electric generator instead of a battery to derive power for electric spark.

All the parts of battery ignition system replaced except spark plug.

Characteristics magneto ignition system

  1. No battery is needed and therefore no problem of battery discharge.
  2. Maintenance problem is less, as there is no battery.
  3. The power for producing spark is obtained from magneto.
  4. At low speed efficiency of magneto ignition system is low.
  5. As speed increases the efficiency of magneto ignition system increases.
  6. Occupies less space
  7. Mainly used in racing cars and two wheeler.
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Image (also featured) attribution: By Andy Dingley (scanner) – Scan from (1911) Mechanical Transport, HMSO, Public Domain, https://commons.wikimedia.org/w/index.php?curid=9884580