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2. Ignition coil - Wikipedia

   en.wikipedia.org/wiki/Ignition_coil

   The ignition coils for these can be combined into a single casing (a coil pack) and located away from the spark plugs; however it is increasingly common for coil-on-plug systems to be used, whereby the individual ignition coils are small units attached directly to the top of each spark plug. An advantage of coil-on-plug systems is that in the ...

3. Ignition system - Wikipedia

   en.wikipedia.org/wiki/Ignition_system

   An ignition magneto (also called a high-tension magneto) is an older type of ignition system used in spark-ignition engines (such as petrol engines). It uses a magneto and a transformer to make pulses of high voltage for the spark plugs.

4. Induction coil - Wikipedia

   en.wikipedia.org/wiki/Induction_coil

   Antique induction coil used in schools from around 1900, Bremerhaven, Germany. An induction coil or "spark coil" (archaically known as an inductorium or Ruhmkorff coil [1] after Heinrich Rühmkorff) is a type of transformer [2] [3] [4] used to produce high-voltage pulses from a low-voltage direct current (DC) supply.

5. Delco ignition system - Wikipedia

   en.wikipedia.org/wiki/Delco_ignition_system

   The ignition coil is a transformer. The primary winding (called the low-tension winding in early texts) is connected to the battery voltage when the points are closed. Due to the inductance of the coil, the current in this circuit builds gradually. This current creates a magnetic field in the coil, which stores a quantity of energy.

6. Inductive discharge ignition - Wikipedia

   en.wikipedia.org/wiki/Inductive_discharge_ignition

   This coil is usually much longer than the primary loop, accomplished by many more loops around the magnetic core. As the magnetic field is built, it induces a current in the secondary coil as well. When the contact breaker opens the circuit, the magnetic field collapses, causing a high electric voltage in the primary and secondary coils.

7. High energy ignition - Wikipedia

   en.wikipedia.org/wiki/High_energy_ignition

   High energy ignition, also known as H.E.I., is an electronic ignition system designed by the Delco-Remy Division of General Motors. It was used on all GM vehicles, at least in the North American market, from 1975 through the mid-1980s.