Injecor impedance?

[Rich M]

klas,
I'm not familiar with specs for the BUK device you quote, but provided it
can deal with a couple of amps without struggling, and there is a mechanism
for clamping excess back-emf from the injector inductance when it switches,
you should have no problem, no ballast required.
The back-emf can be clamped (60V is a good max. value) by external device
(transorb etc.) or inherently by the switching device - a lot of Mosfets
incorporate internal active clamping mechanisms to provide them with an
'avalanche energy' rating; you should be able to see if this is the case
from the datasheet.
If i get a chance, I'll try and look at a data sheet for this device.
Regards

Rich

> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of :) :(
> Sent: 04 December 2000 08:53
> To: diy_efi at diy-efi.org
> Subject: Injecor impedance?
>
>
> Hello all of you.
>
> I am currently building a extra fuel controller to my car (Saab
> 99 with 16V
> turbo) using a pic16f877. I also have some high impedance injectors (16
> 0hms). I am going to switch them whith a BUK102-50GL transistor.
>
> The question is: Do i need any ballast resistors connected to the
> injectors?
> If yes what resistance? Wattage?
>
> regards
>
> klas arvidsson
>
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