Propane on Fuel Injected Cars

[Neall Booth]

Clare Snyder wrote:

> The system is not TBI, I,ve seen it and it has multiple injectors. They have
> been working with FORD, were working with Chrysler, are partnered with
> Martin Marietta (not sure of spelling), apparently were doing some deisel
> work as well. What chrysler is using now may not be their system, but a
> couple years ago they were working together.
> There were dodge 4wd ambulances running with their system.

Actaully, the GFI injector block is called the Compu-valve.  It features
two injectors and five solenoids (7 with natural gas).  The solenoids
open up one by one as the base fuel demand increases.  The injectors
provide triming fuel only, based on the O2 sensor, ECT, etc.  The output
of the compuvalve must then be piped into the intake somehow.  While I'm
not totally sure how it's accomplished, it's basically piped into the
intake.  
It is not a multipoint system, nor is it TBI, however it is something in
between.  There is one example I can think of that used a manifold
arragnment to pipe the gas into each seperate injector port on a 5.2L V8
engine.  However, again this is not multipoint injection, and the
vehicle was a research testbed built at the University of Waterloo in
Ontario.  

Ford does use the complete system on their F150 propane package. 
However, Chrysler has moved away from gaseous induction and spent the
last five years developing a multipoint liquid propane injection
system.  The system is presently installed in the Dodge fullsize van, on
the 5.2L engine, and is on sale in Canada, in limited quantities.  

Back several years ago (10, maybe?) Chrysler did sell vehicles with
gaseous induction systems on them, but that was a number of years ago. 
Whether or not it was a GFI system I could not tell you.


Neall
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Neall Booth		
Bi-Phase Technologies			
Development & Applications Engineer	 
nbooth at hutchtel.net			 
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