Automotive Shared Injectors 1

[BrianGar]

Right, This is pretty vague but its in its early stages, so bare with me, or, delete if necessary.

4 injectors in the cylinder head.

4 injectors in the intake, outside butterfly's.

Im toying with the idea of them switching gradually over to the outers as rpm increases by using the square wave signal pulse generated by the crank sender, (i think its pretty clean but may need isolated amplification?), and of course back as rpm decreases.
I intend using the original signals to the injectors(sequential) but directing signals to the outers as revs go up.
I could mount a separate trigger wheel for rpm if tapping the crank sender upsets ecu.

Can you think of anything that would work before I start designing something from scratch?
Im thinking the injector drivers inside the ecu wont be able to handle driving 8 even though the duty cycle will be shared between the two, and will never exceed its original duty cycle.
Actually, its not really a cycle issue, more so a load issue.

should I just take original injector outputs, run them into some mosfets and work from there?

Brother is an electronics engineer, I am not, I understand it all but I lack some areas in respect to safe guards, exceeding limits, etc. But, I can get my hands on various components off him easy.

I think Its a pretty basic circuit really, and does not require any form of adjust ability or correction.

Just sharing the injector signals between the two pending rpm.

Does anything come into your mind in the line of anything on the market that would suit?
I could run an mfd2 type controller or build something like that, but I dont want to supply additional fuel, just the position of injection.

Hit me with what you want, Im more a mech engineering guy but I understand the electronics theory.

Brian Garvey.

 

[VEBill]

Have you done a proof of concept where you simply wire in some relays to switch from one set of injectors to the other controlled by a simple switch that you could flick at high RPM to see if it makes any worthwhile difference?

It's likely this thread will disappear without warning as it seems to be a home project.

 

[BrianGar]

No, I havent, but it is a valid point.
With regards the thread disappearing fair enough.
It is indeed a project, I dident realise that was against the rules.
After using the search function for the last two years I have come on similar threads though, and they have raised valid points regardless if they ever materialised to production or not.

Brian.