LPG - Liquid Injection
LPG - Liquid Injection
(OP)
Are there any kits out there that inject LPG in liquid form so that when it changes state to the gas, it removes the latent heat from the charge air (turbo application) and has the effect of cooling the intake and with high octane rating as a bonus? :) The injectors in such a system would be similar to typical petrol injectors (ie not a venturi carby system)
Also, do any of these kits allow you to remove the petrol fuel tank and petrol injectors?
Also, do any of these kits allow you to remove the petrol fuel tank and petrol injectors?





RE: LPG - Liquid Injection
Regards
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RE: LPG - Liquid Injection
Are you able to name some of these kits or manufacturers so that I can do some more research? I think I've exhausted google without having some new search terms.
RE: LPG - Liquid Injection
ISZ
RE: LPG - Liquid Injection
Print this and add to instruction book. Problem solved.
I don't know specific kits.
I don't google for others.
Try to google component manufactures, like LPG injectors.
LPG fuel pumps.
LPG engine managment systems etc.
Regards
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RE: LPG - Liquid Injection
If I installed LPG, I would want to remove the petrol system entirely - I don't like extra redundant weight
RE: LPG - Liquid Injection
Regards
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RE: LPG - Liquid Injection
They did not use petrol to start/stop the engines nor have I ever heard of this practice. The idea behind dual fuel systems is you use the fuel that is most economical or available.
ISZ
RE: LPG - Liquid Injection
Second, it helps with cold starting. Older mixer style systems may not start easily on cold mornings and using petrol to start made it easier.
With vapor injection, there has been a concern about getting a slug of liquid past the vaporizer on cold start and freezing the system. Some use petrol start while others do not.
With liquid injection, these injectors take the place of the petrol injectors, thus, using petrol to start is difficult, since the petrol system is removed from the vehicle. There are a few bi-fuel/liquid propane injection systems around, but not many, not that its impossible though.
Franz
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RE: LPG - Liquid Injection
RE: LPG - Liquid Injection
A search of this site is in order, this topic has been discussed at length before, and you may garner some good information from those threads.
I believe Bi-Phase has a liquid kit currently available for the GM Vortec 8100 engine.
Franzh has forgotton more than most of us will ever know on the subject, he is "the man".
j79guy
RE: LPG - Liquid Injection
Bi-Phase is a captive product of Schwans for their internal fleet. I am not aware of any outside installations and sales.
The GM Vortec 8100 is being installed with CleanFuelUSA systems on select cab and chassis applications, plus it has EPA certification. It is the host design for the Roush LP Truck and is being upfitted to Bluebird School Buses. I've driven a few of the converted vehicles and the performance is impressive.
Franz
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RE: LPG - Liquid Injection
Englishrancher
RE: LPG - Liquid Injection
Prolly the same way a barbecue burner does.
RE: LPG - Liquid Injection
The biggest issue with LPI injection systems is sourcing injectors that will handle the pressures, and they are NOT standard gasoline injectors.
Franz
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RE: LPG - Liquid Injection
a lot of the trials cars use gas, and the bottle is upside down, so that the gas stops liquid till it gets to the carb.
they say it gives better response
Marcus
RE: LPG - Liquid Injection
Regards
Pat
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RE: LPG - Liquid Injection
RE: LPG - Liquid Injection
Port injectors designed to meet the requirements of handling the full range of liquid phase propane temperatures and pressures have been in use since the 80's. The one I am most familiar was derived from a very high vapor pressure gasoline injector that was designed to overcome hot gasoline handling difficulties. Yes, dealing with higher pressures and lower temperatures was an issue but basic design mods took that into account long ago. Also thermal shock and metal fatigue used to fracture metering orifice plates on earlier designs.
Newer DI designs in the works seem promising but all have one common pitfall.. deposits. Tip coking and overall clogging are much more difficult to deal with due to higher polymerization temps, especially after hot shut down causes fuel boil out of the injector leaving trace heavy residues behind. Sulphur is as bad today as it was 20 years ago.
Motor Grade LPG is still not widely available and deposit control additives with proven clean-up and keep clean properties are not widely available yet.
Cheers, TurboCohen
RE: LPG - Liquid Injection
Regards
Pat
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RE: LPG - Liquid Injection
RE: LPG - Liquid Injection
RE: LPG - Liquid Injection
And to answer your question, motor grade lp sure is odorized but organic sulphur levels are way too high most of the time by orders of magnitude. Many times our own testing revealed +500ppm.. +100 is the lowest if the odorant is low. Needs to drop under 20ppm for catalyst and o2 sensor life aside from injector life. Sulphur deposits are very problematic and tough to remove from injector internals even with good chemicals that are safe for non metalic components.
I am not sure but a few trials of additives are supposedly underway at clean fuel usa and elsewhere here in the usa and ENI agip may also have a trial in your home country but I cannot verify the efficacy of their products real world deposit control.
Ciao, James "Turbo" Cohen
RE: LPG - Liquid Injection
RE: LPG - Liquid Injection
You may get more help and your question is much more likely to not disappear if you start your own thread.
Red fag this post yourself (It looks a lot better that way than if you leave it and someone else does it).
Post here that you have red flagged this post with a direction to the new thread so no one else posts here.
Cut and paste any answers here to the new thread.
It would not be LP gas in a liquid injection system, it would be liquid propane with maybe some butane and/or ethane
Regards
Pat
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