[Diy_efi] LPG injection

[Chris McKinnon]

I keep wondering how GDI injectors would work. I'd imagine that the heat in
the combustion chamber would keep the injectors from freezing up, plus you
get all the benefits of direct injection. Too bad the injectors are kinda
pricy to play with...

OTOH the Biphase guys seemed to get liquid phase injection working. IIRC
they even had there system fitted as a factory option on Canadian Dodge B
vans in 1997 or so.

Chris

>Andrew,
>	The problem with trying to inject liquid LPG is the latent heat of
vaporization 
>- It sublimates - that is it goes directly from a liquid to a gas and
absorbs 
>enormous amounts of heat from the surroundings to do so - in other words it 
>freezes everything close by including the injector - which will freeze
either 
>closed or open - closed and the engine stops, open and bad things happen!!!
>	This approach has been tried by quite a number of people and the result,
AFAIK 
>has always been failure.... for this reason.
>	Petrol on the other hand does not vaporise it is atomised - mechanically
broken 
>into very tiny droplets.
>
>Regards
>Bill
>
>