[Diy_efi] Ignition Hardware Driver Stage

maier_markus at t-online.de maier_markus at t-online.de
Wed Jul 24 06:23:49 GMT 2002


Hi,

just to clarifiy some wordings:

With the ECM you mean the engine control unit (the uC based system)?

With the EMC, the electro magnetic pick-up sensor is meant?

Thanks
Looks like the vision gets clearer.
Markus


rr schrieb:
> 
> I should not have said TTL, 0 to 5 volts is correct. The
> modules amplify the pickup coil signal and send it to the
> ECM 
> as a reference pulse.
> 
> The ECM drives the EST line to start dwell (active EST)
> then
> fire the coil (inactive EST). The bypass allows the
> module to
> fire the coil independent of the EST line (for setting
> the 
> timing).
> 
> As far as I know the module will fire the coil with out
> the
> use of the pickup coil. That is a separate circuit.
> 
> BobR.
> 
> 
> maier_markus at t-online.de wrote:
> > 
> > Ok, sorry, after having a detailed look on the website,
> I got your
> > point.
> > 
> > Does that mean, these modules can be controlled from
> the processor pin
> > directly? All of the are stating, that they have
> magnetic or hall pick
> > up sensors. I'm looking for the output stage, that
> comes directly after
> > the uC processor pin. I toggle the pin and the ignition
> coil should get
> > loaded. If I turn the pin of, that coil should fire.
> > 
> > So this means: is it ok to drive the module directly
> with a TTL level
> > signal (0..5Volts)? Or will the processor brake? Or
> will the module not
> > work correctly?
> > 
> > Thanks
> > Markus
> > 
> > rr schrieb:
> > >
> > > Just noticed you are in Germany. OK, I do not have
> part
> > > numbers. What you are looking for is the module from
> a
> > > distributor GM car w/EFI. There are a lot of them.
> The
> > > 1986
> > > through 1992 Camaro and Firebirds have them. If that
> > > helps
> > > for a model.
> > >
> > > If you get to a junkyard look for an ignition
> > > distributor
> > > from one of these cars. The module is inside.
> > >
> > > There are wiring pinouts on the incoming site (don't
> > > know
> > > the file name).
> > >
> > > At this link go to the ignition modues, DELCO,
> DM1980.
> > >
> > > http://www.transpo.de/Catalog/Browse.htm
> > >
> > > That is what you are looking for. (or the DM1978,
> > > DM1948)
> > >
> > > BobR.
> 
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