PWM injector driver

[Bruce Plecan]

> At 9:42 PM 4/7/01, Bruce Plecan wrote:
> >What I did some time ago was
> >Let the ecm supply the over all pulse width.
> >I used that to trigger two power mosfets,  one had 8 ohms in series with
the
> >injector, and then a 555 astable mode with no resistor.    After the
astable
> >timed out then all that was left was the one with the 8 ohm series
resistor,
> >and the the open signal of the ecm tuned off the mosfet.

> Didn't try it with a switching power supply feeding a lower voltage to the
> mosfet that stayed on instead of a resistor, eh??

He said *switching power supply* <beavis>.
Doc just leaft the room looking to see if it's menitoned in any of Forrest
Mimms stuff.

> Also pondering on a diode in series with the injector, then apply reverse
> voltage when time to close, just to collapse the field/stop the current,
> not to do an actual reverse current.
> Thoughts???

What I'd like to do is run em on 24v, for opening, min V for On, and then
off.
Bruce


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org