[Diy_efi] peak-and-hold injector driver ic's

[Greg Hermann]

At 2:00 PM 3/9/03, Bevan Weiss wrote:
>Does anyone know of any other peak and hold injector driver IC's than the
>standard
>LM1949(National), L584(ST) and DRV103(TI)
>
>The CS452/453's are no longer in production, and so are very hard to get
>ahold of.
>I've thought about making up a discrete circuit for the same effect, ie high
>current turn on, switch to low current hold after some time t.  It'd just
>take up a little more room, and cost a little more in added component cost.
>Any ideas??
>
>Thanks,
>Bevan

Bevan--

Something FAR superior to the standard P&H drivers can be done.

As I've said here before, look up the design for the hammer throw circuits
for the final generation of mechanical, high speed teletype printers ! The
electro-mechanical problem is a dead analog to the problem of moving an
injector pintle, and the teletype circuits got a great deal more
sophisticated about doing the job _very_ quickly than any injector driver
ever has.

Using this type of circuit (made from discreet components) to drive
injectors, while it would take up a good deal more board real estate, would
also open up a whole new world of injector performance and dynamic range.

Greg



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