Coils

The ignition coil transforms the low voltage energy of the battery into a high voltage signal, in order to create a spark at the terminal of the plug. As a result, it plays a direct role into the smooth running of all petrol-powered combustion engines. Several technologies are available nowadays, from the “classical” coils filled with oil or asphalt to the latest “pencil and top-plug” coils – fitted directly in the spark plug well – and also including the twin-static or the “ramp coil”. For each kind of coil, Bougicord possesses a recognized expertise, stemming from its OE experience
 

COILS TECHNOLOGIES

Six kinds of coils exist :

 

  • Directed Ignition Coil (DIS)​

Bobine-seche

As a static tension transistor, the DIS is part of the ignition circuit  for preliminary carburation engines.
It consists in a primary circuit supplied, a secondary circuit inducted and magnetic circuit.

 

 

  • Bougicord integrated ignition wire set​

bobine-faisceau

Developed by Electricfil, It's suitable for mono or twin static applications. The ignition wire set and coil function are associated in one unit.
Of modular design, it insures connection liability and it is suitable for all engines  configurations.
This solution is the best compromise from the technical and economic point of view when the coil function has to be displaced : hostile environment surrounding plugs, lack of space and/or accessibility.

 

  • Integrated Ignition Unit​

bloc-allumage-integre-bobine-cassette

The integrated ignition unit , developed and patented by EFI Automotive,  is suitable for all engines working with mono or twin static  ignition strategy. It can be inserted in the space between the two camshafts for 16 valves engines or fixed vertically for 8 valves engines.
All high voltage connections are carried out in one  single operation during assembly. The assembly on the engine is facilitated, weight and place of ignition system reduced, energetic output increased and HT connections in framework  of ODB reliable

 

 

  • Top plug coil (mushroom coil)

bobine-top-plug-bobine-champignon

This technic, integrates one coil per plug. The active part is most of the time on the top of the  plug (top plug)
It was used in plane engines for safety  reason, and is now adapted to car engines. 

 

 

  • Pencil coil

bobine crayon

This coil is reserved for mono static ignition applications. It meets new generation engine requirements: mono and multi-sparks. This coil is fitted directly in each spark plug well of 18 to 24 mm diameter.
Compare to the top plug coil, the "active" part is situated inside the plug

 

  • Pencil or top plug coil in rack​

top-plug-en-rack

This coil combines the advantages of the top plug coil and the integrated coil.
 

FAQ

HOW TO DETECT A TECHNICAL FAILURE OF THE IGNITION COIL ?

If one - or several - coils fail, the engine wille experience misfires, and in the most serious cases, the vehicle simply won't start.

WHEN TO REPLACE AN IGNITION COIL ?

We recommend the replacement of the ignition coil(s) every 60 000 km, to keep an ignition system perfectly functional.

HOW TO CHANGE AN INTEGRATED IGNITION UNIT ?

The following mounting instructions and tips are intended to help you properly install
your ignition unit.
1- Make sure the engine is cold before removing the ignition units.
2- First of all, disconnect the negative battery terminal.
3- Disconnect the ignition unit connector, then free the cables from the cable guides.
4- Remove the screws that secure the ignition unit. Use a tool designed specifically for
the type of screw to be removed.
5- Remove the ignition unit from the cylinder head using both hands.
Never pull on the low-voltage connector to remove the ignition unit.
6- Clean the cylinder head with a soft cloth. The mounting surface on the cylinder 1 side
(right-hand insert) must be clean and dry to ensure good electrical contact.
7- Position the new ignition unit, inserting the ends of the 4 silicone extensions in the
spark-plug wells. The cast resin part of the ignition unit must face towards the front of
the engine (front of the vehicle). Put back the screws that hold the ignition unit in place,
pressing simultaneously on the two inserts.
8- Reconnect the ignition unit's low-voltage supply connector, then run the supply cable
through the two cable guides.
9- Reconnect the negative terminal of the battery.

HOW TO CHANGE A DIRECT IGNITION UNIT (DRY COIL) ?

The following mounting instructions and tips are intended to help you properly install
your ignition coil.
1- Make sure the engine is cold before removing the coil.
2- Disconnect the negative battery terminal.
3- Disconnect the coil connector or connectors (for twin static ignition coils).
4- Mark the mounting order for the different leads of the ignition wire set.
Disconnect the ignition wire set from the coil(s).
NB: To disconnect each wire, always pull on the boot. Remove each lead by gently but
firmly pulling on the boot with a twisting motion. Never pull on the wire. Important:
Never use pliers, screwdrivers or other tools to remove the boots.
5- Remove the screws that secure the coil(s). Use a tool designed specifically for the
type of screw to be removed.
6- Mount the new coil(s) with the screws.
7 - Reconnect the wire set in the right order.
8- Reconnect the coil connector(s).
9- Reconnect the negative terminal of the battery.

HOW TO CHANGE A PENCIL COIL ?

The following mounting instructions and tips are intended to help you properly install
your pencil coils.
1- Make sure the engine is cold before removing the coils.
2- First of all, disconnect the negative battery terminal.
3- Disconnect the coil connector. Repeat the operations for each coil.
4- Remove the screws that secure the coils. Use a tool designed specifically for the type
of screw to be removed.
Clean the spark plugs with a soft cloth.
5- Mount the new coils with their screws.
6- Reconnect the connector on each of the coils.
7- Finally, reconnect the negative terminal of the battery.

HOW TO CHANGE A BOUGICORD INTEGRATED COIL-WIRESET ?

The following mounting instructions and tips are intended to help you properly install your
integrated ignition coil and wire set.
1- Make sure the engine is cold before removing the coil.
2- Disconnect the negative battery terminal.
3- Disconnect the integrated ignition coil and wire set connector.
4- Identify and mark the number of each cylinder BEFORE removing the integrated ignition coil
and wire set.
The cylinder numbers are indicated on the output terminals of the integrated ignition coil and
wire set.
The firing order can vary depending on the model:


> Coil 151401 (coil with 3 inserts).
For this integrated ignition coil and wire set, the firing order is: "1/2/4/3".
Note: 1 dot = cylinder no. 1; 2 dots = cylinder no. 2, etc.
 

> Coil 151402 (coil with 3 inserts).
For this integrated ignition coil and wire set, the firing order is: "1/2/4/3".
Note: 1 dot = cylinder no. 1; 2 dots = cylinder no. 2, etc.
 

> Coil 151405 (coil with 4 inserts).
For this integrated ignition coil and wire set, the firing order is: "1/2/3/4".
Note: 1 dot = cylinder no. 1; 2 dots = cylinder no. 2, etc.
 

NB: Electricfil - Bougicord disclaims all liability if the integrated ignition coil and wire set is
mounted incorrectly.

5- Remove the screw(s) that secure the integrated ignition coil and wire set. Use a tool designed
specifically for the type of screw to be removed.
6- Clean the spark plugs with a soft cloth.
7- Mount the new integrated ignition coil and wire set with the screw(s).
8- Reconnect the integrated ignition coil and wire set connector.
9- Finally, reconnect the negative terminal of the battery.