Fw: Injector control

[Bruce Plecan]

-----Original Message-----
From: Ludis Langens <ludis at cruzers.com>
To: Diy_efi <diy_efi at esl.eng.ohio-state.edu>
Subject: Re: Injector control


snip
>
>GM is 1/65536 or 1/65517 of a second.  So, about 15 microseconds.
>

snip
>
>One particular ECM and calibration increases narrow pulse widths using
>this table (1 unit is 1/65517 seconds):
>
>  1 unit -> 16 units
>  16     -> 31        * would this mean anything less than 16 is shown 
                                  as 31
>  32     -> 47        *>31, but <47 shown as 47?

>  48     -> 58                         .088*
>  64     -> 72                         1.09*
>  80     -> 86                         1.31*
>  96     -> 101                       1.54*
>  112    -> 115                      1.75*
>  128    -> 130                      1.98*
>  144    -> 144           about 2.2* msec

* stuff I added
These would be the injector on times we could expect to see?.
What happens to the values between the steps you've shown?
Thanks
Bruce
>
>Thus, any pulse width less than about 2.2 milliseconds gets stretched. 
>When used with an automatic transmission, this same ECM doubles up
>injector pulses when they would have been less than 1 millisecond.  That
>is, it gives one twice as long pulse instead of two short pulses.
>
>-- 
>Ludis Langens                               ludis (at) cruzers (dot) com
>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
>
>