EFI for Propane

[Marc Piccioni]

Have you considered the possibility of have the injectors freezing ? As the 
propane expands it removes a lot of heat from the surrounding area, this is 
why the propane expansion chamber is always heated with engine coolant.

----------
From: 	Raymond C Drouillard[SMTP:cosmic.ray at juno.com]
Sent: 	February 25, 1999 11:57 PM
To: 	diy_efi at efi332.eng.ohio-state.edu
Subject: 	Re: EFI for Propane


>....What about cooling the lpg to a point where its liquid, then we
>could use regular efi injectors, we dont have to create a box that must
>regulate injection time for the variable pressure that temperature is
doing
>
>for lpg fuel pressure.Can a Lucas disc type injector cope with the
>pressure?
>What about two injectors in series?One ontop of the other?
>I have been thinking of just pumping twostroke oil into the lpg tank
>to get a mix.
>Espen Hilde

I was thinking of feeding the liquid into the injecter at perhaps 330
PSI, and using something similar to a diesel injecter on the other end
that opens at 300 PSI.  That way the injecter would see a 30 PSI
difference in pressures, and be dealing with a warm liquid.  The standard
injecter would be used as a valve, and the propane would vaporize once it
leaves the injecter (regulater or whatever you want to call it).

I would rather have an injecter that can handle the 300 PSI without such
a jerry rig, though.

Ray

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