injection strategies for 4 cyl, port injection (1.6L Toyota

[Diehl, Jeffrey]

I think it's just a matter of implementation.  I'm still in the design
phase, btw.

Mike Diehl,
'87 MR-2, 7age, Dual Pipes, hand-bent header.
'96 4-Runner, Bone stock.
'90 Corolla, Disguised as a Geo Prism!


> -----Original Message-----
> From: Ron Schroeder [mailto:rjs at bnl.gov]
> Sent: October 03, 2001 12:55 PM
> To: diy_efi at diy-efi.org
> Subject: RE: injection strategies for 4 cyl, port injection 
> (1.6L Toyota
> 4 AGE)
> 
> 
> At 12:13 PM 10/3/01 -0600, you wrote:
> >Ron,
> >
> >The reason I would change to batch mode at higher RPM's is 
> that it makes the
> >circuit easier to build.  Instead of firing the same 
> injector twice as
> >often, I simple fire the same injector with both it's 
> regular firing circuit
> >and another injector's firing circuit.
> >
> >For example:
> >
> >At idle, injector #1 is fired by circuit #1, #2 by circuit #2, etc.
> >In batch mode, injector #1 is fired by circuit #1 and #4, #2 
> by #2 and #3,
> >etc.
> >
> >This is equivelent to firing them out of phase as you 
> mention and will cool
> >the valves.
> 
> Hi Jeff,
> 
> So you're firing each injector once every other revolution at 
> low loads
> (one at a time) and once each revolution at high loads in 
> batch mode (all
> at the same time).
> 
> But couldn't you continue to fire each injector once every 
> other revolution
> but up to almost 720 degrees of crank angle?
> 
> 
> Ron Schroeder
> WD8CDH
> E. E. S.
> wd8cdh at bnl.gov
> rjs at bnl.gov
> ron at 112motors.com
> 631 344-4561 Day
> 631 286-5677 Nite
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