Coil Pack is technically a "Pencil Ignition Coil" to the auto industry.
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Coil Pack is technically a "Pencil Ignition Coil" to the auto industry.
I've been mucking around with Google for info on coils this morning. Bosch, Beru and Visteon call the type of coil attached to the spark plug a "pencil ignition coil". I guess CPM is gonna have to change his name to PICM. 
Rolls off the tongue nicely, eh?
<a href="http://www.boschusa.com/AutoOrigEquip/Gasoline/SystemComponents/">BoschUSA PIC</a>
<a href="http://www.beru.com/english/produkte/zuendspulen.php">Beru AG PIC</a>
<a href="http://www.visteon.com/technology/automotive/media/pencil_ignition.pdf">Visteon PIC</a>
Also, thought <a href="http://www.beru.com/english/aktuelles/presse/20020516.php">this</a> Beru press release dated 20020516 (May 16th, '02?) was interesting: "Weak car output in Europe, particularly in Germany along with the ending of a contract to supply ignition coils to the VW Group caused sales to fall by 7% in the fourth quarter." Read the last paragraph under "Diesel technology and automobile electronics generate growth".
Rolls off the tongue nicely, eh?<a href="http://www.boschusa.com/AutoOrigEquip/Gasoline/SystemComponents/">BoschUSA PIC</a>
<a href="http://www.beru.com/english/produkte/zuendspulen.php">Beru AG PIC</a>
<a href="http://www.visteon.com/technology/automotive/media/pencil_ignition.pdf">Visteon PIC</a>
Also, thought <a href="http://www.beru.com/english/aktuelles/presse/20020516.php">this</a> Beru press release dated 20020516 (May 16th, '02?) was interesting: "Weak car output in Europe, particularly in Germany along with the ending of a contract to supply ignition coils to the VW Group caused sales to fall by 7% in the fourth quarter." Read the last paragraph under "Diesel technology and automobile electronics generate growth".
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Re: Coil Pack is technically a "Pencil Ignition Coil" to the auto industry.
Very interesting. It is encouraging that the VW Group fired the supplier. However, this probably explains the supply crunch. I wonder if the inginiton coils were made by Beru's Hungarian subsidiary. This could explain the quailty problems. Remember, this is the part of the world where "quantity has a quality of its own" it's just that they couldn't make enough either.
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Note the use of integrated electronics in coil packs...
>Integrated coil driver circuit [Bosch]
>Isolated secondary circuit for misfire detection [Visteon]
>Integrated power stage with over temperature cut-off [Visteon]
These packs are more than just a coil. It's what I've been saying all along: it's not the coils that are failing; it's the integrated electronics up in the head under the potting compound.
Anyone ever consider the coil pack may contain a protection circuit that blows instead of the ECU?
>Isolated secondary circuit for misfire detection [Visteon]
>Integrated power stage with over temperature cut-off [Visteon]
These packs are more than just a coil. It's what I've been saying all along: it's not the coils that are failing; it's the integrated electronics up in the head under the potting compound.
Anyone ever consider the coil pack may contain a protection circuit that blows instead of the ECU?
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Re: Note the use of integrated electronics in coil packs...
I agree. They are more than just a simple ignition coil. I wouldn't be surprised if the sensitive electronics are what's failing, too.
As a side note, I was wondering if a knock sensor could be integrated into them for individual cylinder ignition timing control? I doubt they have this since neither of the 3 manufactures touted this capability. Food for thought, though.
As a side note, I was wondering if a knock sensor could be integrated into them for individual cylinder ignition timing control? I doubt they have this since neither of the 3 manufactures touted this capability. Food for thought, though.
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It's not like Audi was the first to use these coil packs. But they may have...
...pushed the performance envelope into new territory. Maybe the inclusion of a circuit to monitor gap resistance to then increase, modify, or optimize spark characteristics. If so, they wouldn't talk about why the failures were occurring so as to protect a trade secret.
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