Was Detroit Diesel listening to Paul when they created their next
generation engine to replace the Series 60?
Well, the DD15 has a non-waste gated turbo connected through a gear box
that drives the crank shaft, very similar to what Paul has been
describing for years....
They are getting back 10% hp increase AND 5% fuel burn reduction from
this. I read about it in this month's
http://www.dieselpowermag.com
<http://www.dieselpowermag.com/>
<
http://www.dieselpowermag.com <http://www.dieselpowermag.com/>> when
it came in the mail yesterday. It is a bit too centered on large trucks
running diesels these days. Maybe they will wake up and realize
Americans will buy diesel cars and small trucks in droves if the EPA
will leave their emissions requirements in one place for the makers to
meet. (DCX got requests for 50K Liberty diesels when they only tooled
for 5K per year. Similar demand for the E320 CDI M-B)
-dave
Is there anything on that web site about the turbo compound Dave?
If not can you scan that article for me? 300 dots per inch is about
right.
This seems to be a better site.
http://www.detroitdiesel.com/engines/dd15/economy.aspx
That is good for a diesel as there is not a lot of waste energy in
the exhaust. Turbo compound will come. It is just a question of when.
--------------------------------------------------------------
Configuration Inline 6 cylinder
Displacement 14.8L
Compression Ratio 18:4:1
Bore 5.47 in (139 mm)
Stroke 6.42 in (163 mm)
Weight (Dry)2970 lbs
455-560 Horsepower
1550-1850 Lb-Ft Torque
---------------------------------
Dave, if you don't mind please take some detailed pictures
of the turbine parts of the DD15 at the Detroit auto show.
--
Paul Lamar ...No rotor no motor.
Pretty interesting. I think it's funny the graphic says "RPM's".. Is
that trucker? :)
I'd like to see more pictures too. How long 'till it's ready for
production?
Matt-
It was introduced in Oct 2007 and several truck drivers have written
glowing
testimonials.
What I can't figure out is how the blow down turbine works.
It looks backwards to your average turbocharger turbine. The hot gases
appear to enter the center of the turbine and exit at the periphery.
Very interesting.
It also appears they are feeding the power directly into the starter ring
gear on the flywheel. This results in a high built in gear reduction.
Very elegant, simple and compact way of doing it indeed. Entirely
different than
Scania and Caterpillar.
Paul Lamar ...No rotor no motor.
Paul,
Looks interesting. Two comments though, first the cutaway shows the
regular turbo
exhaust (normal exit) does feed the normal entry to the blowdown
turbine. Second
the gearset used is inside the engine and definitely is not the starter
ring gear. You
can see the flywheel slightly to the rear of the crankshaft mounted
gear. The fact that
is interesting is that this engine appears to have been designed for
turbocompounding
from the outset. The input area and the spacing for the gear had to be
designed in
from the first! looks like they are starting to catch on.
Bill Jepson
I don't have a cut away dwg on the DD15. I think that is the Scania version
you are looking at. No doubt it is way more complicated than the DD15.
Check the file names on the pictures.
Paul Lamar ...No rotor no motor.
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