On Mon, 05 Jan 2004 22:14:29 +0000, Stewart
wrote:

LPi (Liquid Propane Injection) is available as a factory fit item.

It is? So all these problems are already overcome, then.

To repeat Cummins Westport are supplying SI LPi truck and bus engines
to the USA market. They use about 40psi injection pressure and need a
tank assist pump for low temperatures.

Vialle have the technology - numerous patents in place but it appears
they will only transfer technology to car makers as a 1st tier
supplier.

Not to sure about the current status of Bi-Phase but they claim 5400
systems installed (2001-2002?).
http://www.ccities.doe.gov/conferenc...ch_biphase.pdf
Despite the name Bi-Phase is a 100% LPG liquid phase injection system
- the petrol fuel system (tank, injectors, fuel rail etc) is not
fitted. The LPG injectors are fitted in the vacant holes on the
manifold. Overall cost ex works should be not a lot more than the OEM
petrol system, injectors and ECU should be about same cost, the fuel
rail, double walled fuel line and tank are higher cost items (maybe
double) but some saving can be made by not having to fit a separate
return line, carbon canister, vapour purge system and check valves in
fuel vapour lines. As the petrol system is never fitted would it be
eligible for a power shift grant?

When it comes to LPG North America leads the way technically through
commercial use, even though they have not had any nice big duty cuts,
grants or car tax breaks to encourage development. UK and NL have
been concerned with developing a user base for duty paid forecourt
supplies and not a viable technology base for OEM supply of LPG fueled
vehicles. As the UK infrastructure is in place now is the time to
move to 100% LPG fueled vehicles with OEM optimised engines and do
away with the dual fuel conversions.

--
Peter Hill
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