Injecting Liquid LPG

[whizzo944]

Hi everyone, I'm wondering if you can use injectors designed for petrol (gasoline) to inject liquid LPG, or if not, where do you get injectors designed for this purpose?

Thanks,

Dave.

[mitsuko]

Pressure is abt 15 bar to inject liquid .
Std injectors won't hold that kind of pressure .

Only one manufacturer I'm aware off , vialle .
Don't bother to mail them , they wont reply .

Injectors , tanks and pump are almost impossible to obtain .
A fewmonth's back there was a used ona at the local lpg shop .
Think it was 400 euro's or something .
injectors , tanks with pump , and electronics .


I have one setup , wich I got from a friendly dealer .
Came from a volvo V70 , so it's perfect for me .
This is supposed to end in my audiur-q 20V turbo project , wich
hasn't even started yet .

I can post some pictures if you like .


Pat

[schwepes]

Maybe III-gen LPG could be installed? It is injection of LPG in gaseous phase.

This kind of injection uses 2-step pressure regulator:
1.step: pressure is reducted to ~160kPa, so LPG is in gaseous phase
2.step: pressure is adjusted to 95kPa above presure in intake manifold

Then gas is distributed by batcher to injectors (I don't know if injectors are controlled by ECU, but probably not). Mixture ratio is determined by batcher controlled by ECU.

[Bill Shurvinton]

Pressure is abt 15 bar to inject liquid .
Std injectors won't hold that kind of pressure .

Only one manufacturer I'm aware off , vialle .
Don't bother to mail them , they wont reply .

Injectors , tanks and pump are almost impossible to obtain .
A fewmonth's back there was a used ona at the local lpg shop .
Think it was 400 euro's or something .
injectors , tanks with pump , and electronics .


I have one setup , wich I got from a friendly dealer .
Came from a volvo V70 , so it's perfect for me .
This is supposed to end in my audiur-q 20V turbo project , wich
hasn't even started yet .

I can post some pictures if you like .


Pat

Dang pat, I wish you wouldn't keep telling me that. If you do see another for around the 500euro mark please PM me.

[mitsuko]

Don't worry Bill , I keep my eyes open .
 
It's getting harder and harder .
The law has changed over here , and now it's illegal
to install lpg yourself in your vehicule .
Only people with a licence can do it now .
 
Ha I remember explaining a guy , with a licence , why the engine
stalled  at idle when he engaged his airco .
He simply wouldn't understand why his isv also needed lpg
instead of air only .
 
Pat
(posted by email)

[miked]

Whitepaper on "The GMI Fuel Injected Propane Conversion Vehicle"

Abstract: The GMI team chose to port inject liquefied propane gas (LPG) in its liquid state to effectively utilize the potential of LPG. The GMI entry successfully executed four primary customer driven goals which were to maintain or exceed the performance of the current gasoline fueled engine, improve emissions, demonstrate that such a system can be easily and economically integrated into production at the rate of 10,000 vehicles per year, and finally to make this novel system essentially invisible to the operator.


http://www.kettering.edu/~lpgvan/SAE-LPG.html

[roundman_fabrications]

I'm looking for high pressure injectors as well.
I read the aforementioned article some time ago. They mentioned getting the injectors from a company in Minnesota. I could not locate the business. I emailed Kettering, the professor who supervised the design team for the paper is evidentally no longer there and none of the other faculty members would respond.
I've been wondering about the possibility of adapting one of the new electrically controlled diesel injectors for this purpose, but haven't yet had time to research the possibility.

[roundman_fabrications]

Pat,
Would you mind if I asked you 20 questions about Vialle and the system you salvaged from the Volvo?

[mitsuko]

Go ahead , it's one of my favorite subjects .

Pat

[roundman_fabrications]

I never expected to run across anything on liquid propane injection here.
There isn't a great deal of information available. This Vialle is the first bonafide company I've found that manufactures 15 Bar injectors. I checked out their website and noticed dealers in the Netherlands and Belgium. I also found a dealer in the UK. I've emailed them to inquire if the injectors can be purchased individually (vs. having to purchase an entire system). Would you happen to know? It also doesn't appear anyone is importing their equipment into the states.
From your post, I take it that the Volvo system you've acquired is in fact a liquid (high pressure) system. Is it the Vialle system? Aftermarket?
Do the injectors dump right on top of the intake valves as with a stock port injection system? Was it a turbocharged application?
Guess I'm not up to 20 questions yet, but I'll give you a break. I'm very curious about this LPG business and welcome ant and all attempts to educate me. I've done some vapor system conversions (and some dual fuel) back in the late 70's. You know what a great fuel LPG is, i.e., clean burn, high octane, cheap, and if injected as a liquid, more effiecent than gasoline. Hence, I have this silly twisted desire to apply this technology to drag racing.