Injecor impedance?

[Rich M]

whoa! I've just found the datasheet for BUK102 - should be no problem at all
with that one - protected against just about anything but nucle at r fallout!
I have also re-read your original message and you say you 'also have some Hi
imp. injectors' - I read this to mean you are making an add-on controller
for these additional injectors - am I still on track or got the wrong end of
the stick???

Regards

Rich

> -----Original Message-----
> From: Rich M [mailto:rsrich at cwcom.net]
> Sent: 04 December 2000 09:32
> To: diy_efi at diy-efi.org
> Subject: RE: Injecor impedance?
>
>
> 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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