[Diy_efi] LPG injection

[robertv at rvtech.com.au]

The injectors would be mounted in the manifold not the head so the chances of
freezing would still be high considering that they are mounted in rubber
grommets.

Rob
Quoting Chris McKinnon <chrism at cnx.net>:

> 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
>>
>>
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