Ignition Coil Technologies
The continuous development of an ignition system has advanced over the years – and with it, the ignition coils used by car manufacturers. In general, ignition coil technology can be split into two fundamental operating principles: ‘single spark technology’ and ‘dual spark technology’. With single spark technology, there is an individual coil for each spark plug supplied. With dual spark technology, two cylinders are always actuated simultaneously by one coil.
- NGK ignition coils use the technology required by the car manufacturers
- The vacuum molding process is used to ensure a blister-free encapsulation
- Each ignition coil is produced in strict compliance with OE specifications
Ignition Coil Requirements
Due to the high demands placed on ignition coils, the design and the materials used must be resistant to heat and moisture in the engine bay and function reliably. Oil and petrol vapors mustn’t be able to harm the housing, as damage to the housing would impair the function.
Types of Ignition Coils
Distributor ignition coils
With a distributor ignition coil, the high-voltage pulse generated by the ignition coil passes through an ignition cable to a mechanical ignition distributor. This, in turn, distributes the high-voltage pulse to the corresponding ignition cable, which provides voltage to the cylinder. This ignition coil type can be found in older vehicles; it was in use well into the 1990s.
Block ignition coils
A block ignition coil contains multiple ignition coils that supply the spark plugs with the necessary high-voltage pulse through their respective individual high-voltage outputs and via ignition cables. Block ignition coils are offered with single and dual spark technology.
Pencil coils require no ignition cables; they are attached directly to the spark plug and the high-voltage pulse is generated directly at the spark plug. The advantage: There is essentially no voltage loss caused by the cable. In addition, this compact design provides for valuable additional space, which is particularly important in modern engines.
Ignition coil systems (“rails”)
This ignition coil type is comprised of multiple ignition coils, which are combined to form a single, compact component. All ignition components are connected to the spark plugs in one step. This type also includes so-called “rails”.