Additional Injector Controller

[David Rhoads II]

If your MAP sensor puts out an analog voltage you could probably just
use a voltage to frequency converter chip.  Don't remember any part
numbers off hand but a search should turn up several parts that can do
it.

----------------------------------------------------------------------

Date: Mon, 19 Mar 2001 16:45:53
From: "Ian Habicher" <ihabicher at hotmail.com>
Subject: Re: Additional Injector Controller

snip ...

Hehehe sounds easy unless you have no clue how to do it.  To me a simple

analog controller would be enough, doesn't have to be fancy or
'programmable', I've heard that it can be done with a 555 or other chip
set
up to provide a variable duty cycle based on boost sensor (MAP) voltage.

Reading and factoring in RPM isn't important, the injector just fires
once
every half-revolution, based on the stock injector signal, and the pulse

width is determined by MAP sensor.

That way it'll work kind of like a rising rate fuel pressure regulator,
but
will be more controllable, less crude and will not be so hard on the
rest of
the system.

snip ...
--------------------------------------------------------------------------

--
. David Rhoads II
. Applied Dynamics International
. 3800 Stone School Road, Ann Arbor, Mi 48108
. (734) 973-1300
. rhoads at adi.com   web site:  http://www.adi.com


----------------------------------------------------------------------------
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