To whomever is interested:

 Turbocharged direct fuel injection is the coming way to reduce
fuel consumption to fit the new EPA rules.  Many of the new high
end cars have it now.   The new Ford Taurus SHO has it.

The EcoBoost's twin turbochargers are capable of 205,000 rpm, so
they spin up fast without turbo lag.  With the the direct spray
fuel injectors, the fuel is delivered  directly into the
cylinders at 3000 psi.   The fuel is atomized to create fine
droplets that average 15 microns in size.  It also has a cooling
effect that allows denser air into the combustion chamber for
maximum power.

The injector pump is a crank driven variable displacement
plunger style.  There is a cam on the crank shaft.


The injector pump, part No 9350, has a retail price of $360.
The piezo- electric injectors, part No. 9F593 are $206 each.

Gene Sandburg
                      What is the bottom line? What MPG ratings were the
previous cars
and what are the MPG readings on the new cars with direct inject?

Paul Lamar

I thought I'd offer up a bit of an observation on the "Eco-Boost".
First of all there is a bit of marketing gloss applied here, as in
anything automotive. The Eco part is that the direct fuel injection
leads a major role in reducing emissions from previous fuel injection
systems. The Boost part is of course, a turbo charger, allowing for
higher power output from smaller displacement engines.
The bottom line? As the Taurus SHO is an all new model, there is no
previous model I could contrast any figures against. The EPA milage
figures match those of similar HP V-8 engines, but of larger displacement.
If you are a conservative driver, and aren't running high boost, you
will get milage of a V-6. If you aren't so conservative, you will get
milage of a V-8.

To get a detailed answer, one would have to look at a lot of factors
like GVW, displacements, HP, and probably a couple other factors of the
comparisons to get meaningful numbers. At first glance it looks to me
like the laws of physics are still the masters of the universe, and
there are no significant increases in BSFC, just better emissions
than non-direct injection engines.

I see only direct injection engines in test, so that will be the
new norm for Ford, across the board.
Hope this clears up a few things. There are some good videos on
you-tube that clear up what Eco-Boost really means, but it's
hard to get the merketing influence out of any production.

C. Smith

Well put Craig.

For your information Craig is in a unique position to know what
he is talking about.


Paul Lamar



Craig,
can you get me data on the pump and injectors?
The pump sounds like a variable volume constant pressure pump.
and what is the electronic drive like for the injectors?
Thanks,
Larry