nozzle per cylinder setup
 

What's the best way to achieve this ?

Looking to do a nozzle per cylinder and controlled by the ecu. I assume Aquamists solenoid valve will work and flow enough for all 4 nozzles, or would more than one solenoid be required ?

Hoping for 4-500bhp on a relatively small 4 cylinder engine. Will be using water/meth, but want 4 nozzles to ensure each cylinder gets equal flow.

Just energise the pump at a preset MAP setting, and then inject liquid as required ? Probably just map water/meth flow relative to IDC for starters.

Sound sensible ?

Any other nozzle or solenoid options ?

Re: nozzle per cylinder setup
 

Are you intending to use an independent progressive methanol map or just trackinhg the fuel duty cycle.

If you track IDC, it woukd be easier to use 4 valves and use the existing fuel injector signal to obain full sequential spray.

Re: nozzle per cylinder setup
 

Initially will probably just base water output relative to IDC just to get up and running, and see how it performs. It's for a small 1300cc engine, and hope to make some decent power, so may need to increase or decrease flow as boost/rpm rises etc

But the ecu will be in full control so I can run it's own map

At high loads, I doubt a sequential spray will offer much, if any benefit anyway ? And unless I was using another 4 injector outputs, they couldnt be timed for valve opening etc anyway.

Or were you suggesting just piggybacking the water solenoid off the injector ?

I just want more control than the typical progressive controller offers, and given intake manifold shape, I wouldnt trust a single nozzle for equal distribution of liquid.

Re: nozzle per cylinder setup
 

I was suggesting piggybacking four solenoid valves to each fuel injector. Most ECU can drive extra load. It will be more costly.

A single solenoid valve branches out to four nozzles will also work but need to trigger the system slightly earlier to purge any air out of the lines due to action of vacuum purging out the water inside the delivery hoses.

Re: nozzle per cylinder setup
 

Doing that wouldnt give me any control though as it's fixed.

I'd rather size the nozzles large at say 1mm per cylinder, and let the solenoid control actual flow. That way I can start low and add more, or visa versa.

And it will be easy to mount the solenoid close to the nozzles. But yea I would start injecting quite early to ensure it's there when it is needed. Same with powering the pump up early.

What sort of flow ability does the solenoid have ?

Re: nozzle per cylinder setup
 

You cannot alter the IDC% ratio but you can alter the flow ratio by sizing the jet.

Aquamist has a range if solenoid valves to handle flow between 400cc/min to 1600cc/min. Ideally, select a solenoid valve to match the fluid flow helps the linearity.

Re: nozzle per cylinder setup
 

I'd prefer not to have to mess about changing jet sizes if possible.

I think an 800cc or so should be more than adequate.

Unless using this method may affect spray pattern at the nozzles at lower flow ?

Re: nozzle per cylinder setup
 

A PWM valve system does not suffer much at low flow see video here

You can also see a random sequential PWM valve demonstration there.

Re: nozzle per cylinder setup
 

Looks good. I think that should work well then. A big solenoid valve and say 0.8mm-1.0mm nozzle per cylinder, lots of boost and maybe 4-500bhp :D

Re: nozzle per cylinder setup
 

There will be a great deal of flow for sure.

Re: nozzle per cylinder setup
 

If you want to go sequential, we have the valve assembly for you:

http://www.aquamist.co.uk/forum/bank-s.jpg

Re: nozzle per cylinder setup
 

Looks very nice....and very pricey lol.

I think a single solenoid will work fine. Have lots to do before it's up and running anyway

Re: nozzle per cylinder setup
 

As we get better in manufacturing these valves, the price will drop. As soon as we tighten up the tolerances of each component, it will be much easier to assemble and calibrate.
It is our intention to bring this component into our future systems as more and more Di engines struggle to make big power due to lack of fuel capacity.

Re: nozzle per cylinder setup
 

What a beautiful part ! It's piece of art to me .

Richard ,

What can be the difference using sequentiel water injection running fast acting valve at all the same % but phased seperately at ideal time with each injection event OVER traditional water injection (one fast acting valve to 4 jet).

Maybe not such a difference ... or worth the try ?

Claude

Re: nozzle per cylinder setup
 

Sequential injection is not necessary unless you want to suppliment the lack of fuel due to the linitation of some of the DI car engines.

It is not totally safe as we have not yet developed a failsafe that will detect clogged each individual nozzle on sequantial applications.