[Diy_efi] EFI system data

[Kent Martin]

Bruce,
A 20khz PWM signal is applied after injector is opened to keep it open.
This is an alternative method to using an analouge control or passive
circuit.
Not sure if it is used as processor overhead is large but it is possible.
Kent.

----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Sunday, July 23, 1995 10:02 PM
Subject: Re: [Diy_efi] EFI system data


>
> ----- Original Message -----
> From: "Kent Martin" <kentmartin at froggy.com.au>
> > Does anyone out there know what the average injector open time is for a
> low
> > impedance injector,
>
> Suggested operating times for the P+H is 2-5 msec.
>
> > and also the minimum off time to allow it to close.
>
> Varies.
>
> > Also a question regarding increasing injector pressure to increase flow.
> > If injector fuel pressure is increased how much more current will be
> > required to hold it open, proportional to fuel pressure increase?
>
> Never heard of it being enough to worry about.
>
> > What is the duty cycle required to keep the average injector open
> (assuming
> > a 20 Khz frequency)?
>
> 20KHz?  Your not goin find and injector to operate at that speed.
> Bruce
> >
> > Kent.
>
>
>
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>
>



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