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+--- Thread: multi-point LPG fogging, worth considering? (/showthread.php?tid=1858)
multi-point LPG fogging, worth considering? - 300D50 - 10-14-2010
I've got a hair-brained idea.
Put an efi injector right at the end of each intake runner, fogging lpg into the head.
Have said injectors synched to the valvetrain via a VR sensor off either a tooth gear on the crank orthe cam gear, add a boost sensor, lpg pressure sensor, some form of TPS, and a lockout valve. Have the pulse width vary based on a user defined curve incorporating boost, tp, and maybe egt, so you can maximise the cooling effect yet still keep from going over-rich or getting too hot.
Thoughts?
Main idea for having it multipoint and variable is to get more even distribution(every cylinder gets it's own metered "shot"), with the added benifit of only having the propane on when the intake valves are open.
RE: multi-point LPG fogging, worth considering? - ForcedInduction - 10-15-2010
Propane does not work well in IDI diesels. You can only inject a small amount so the cost isn't worth the results.
RE: multi-point LPG fogging, worth considering? - 300D50 - 10-16-2010
Ah, yes..
I see now after more research that it would just cause some nasy detonation once the flamefront came out of the prechamber and ignited the propane + air in the cylinder.
Well, nothing lost thinking about it, and I learned a bit more as well, so it's all good.
RE: multi-point LPG fogging, worth considering? - ForcedInduction - 10-16-2010
The bigger concern is the propane hitting the glowing ball inside the prechamber. It works great in DI diesels since they don't have a hot/high pressure zone to make it preignite.
My belief is that its always detonating on IDI engines, there is just a point when the fuel quantity is low enough the detonation is too quiet to be heard over the engine/road noise.