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While General Motors and Ford drag their feet, Chrysler says "YES" to turbodiesels in half-ton trucks

It looks as though diesel mania is finally starting to catch on in the United States. Chrysler has confirmed that it will be offering a V6 turbodiesel in its Ram 1500 "consumer grade" pickup during the third quarter of 2013 according to USA Today.
 
The Big Three (Chrysler, Ford, GM) have long offered turbodiesel engines in their heavy-duty pickups, but have been reluctant to offer diesel power in their half-ton trucks due to concerns that Americans wouldn't pony up the money for a more fuel efficient engine (the 6.7 liter Cummins turbodiesel option on heavy-duty Ram pickups is a $7,795 option).
 
Auto enthusiasts have been craving a diesel engine in half-ton pickups for years, but the manufacturers have constantly pushed back. Chrysler, however, is finally listening to its customers.  "Customers have been emphatically asking for this, thirsting for it, craving it," said Fred Diaz, CEO of Chrysler's Ram division, citing internal studies.


Ram 1500
 
Unlike the diesel engine offered in heavy-duty versions of the Ram, Cummins won’t make this engine. Italian company VM Motori will instead manufacture the 3-liter V6 turbodiesel. The same engine will be available in the 2013 Jeep Grand Cherokee and produces 240hp and 420 lb-ft of torque in that application.
 
For comparison, the 5.7-liter V8 Hemi available in the Ram 1500 produces 360hp and 390 lb-ft of torque. Ford's 3.5-liter EcoBoost V6, which is billed as a fuel-efficient and powerful option for the F-150, is rated at 365hp and 420 lb-ft of torque. However, it wouldn't be a stretch to state that the Ram 1500 turbodiesel should have no problem outclassing the EcoBoost in EPA and real world fuel economy.
 
Chrysler is currently staying mum on pricing/fuel economy for the turbo diesel engine option, but TrueCar.com expects the company to court an additional 10,000 in the first year of availability with continued growth in the coming years.

Updated 2/14/2013 @ 2:32pm EST
Chrysler has made an offiical announement on the light-duty turbodiesel.

Sources: USA Today, Chrysler



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RE: It's about time
By Bad-Karma on 2/14/2013 12:22:00 PM , Rating: 3
quote:
Diesels don't produce "constant high torque". It's based on throttle position, load and rpm.


A diesel operates in a very narrow RPM band. On a dynometer you'll also see that a diesel's torque is relatively flat across that band.

quote:
Diesels don't have incredibly "short piston strokes"...


Odd...I have IH,Cummins,PS,and Cat diesels in my vehicles, I do all my own repair work, and yes they are much shorter stoked than their gasser equivalents.

quote:
Diesels don't put any more stress on a chassis than an equivalent output gasoline engine.


Again, a diesels torque curve is relatively constant and flat over a very short RPM range, while a gas engine's maximum torque is only ever realized in a very small section inside its RPM.

A diesel can maintain it's torque numbers all day, while a gasser tends to destroy itself when operated at max torque too long.


RE: It's about time
By drycrust3 on 2/14/2013 2:52:35 PM , Rating: 2
quote:
Odd...I have IH,Cummins,PS,and Cat diesels in my vehicles, I do all my own repair work, and yes they are much shorter stoked than their gasser equivalents.

Are these engines turbo charged?


RE: It's about time
By Bad-Karma on 2/14/2013 3:23:47 PM , Rating: 2
quote:
Are these engines turbo charged?


The only one I have that isn't is an old Detroit Diesel that I've rebuilding to use as a generator.


RE: It's about time
By Argon18 on 2/14/2013 4:54:35 PM , Rating: 3
How does a gasser "destroy itself" when operating at max torque? Modern high performance gasoline engines, at least the ones from BMW and Porsche that I'm familiar with, use variable valve timing to give outstanding low end torque.

The M54 engine in my 2004 BMW 325i makes maximum torque at just 3500 rpm, which is incidentally also the speed of the engine when cruising on the highway in 5th gear.

Also, claiming a diesel operated in a "very narrow rpm band" is misleading as well. My w210 Mercedes turbodiesel has an engine redline of almost 6000 rpm. 6000! and I regularly run it up there. I understand most trucks are closer to 3500 rpm, but that's more a function of how that particular engine is tuned, not of diesel technology in general.

Agree that modern diesels are a superior technology, but assumptions, generalizations, and false statements don't help anyone.


RE: It's about time
By Dorkyman on 2/14/2013 5:58:00 PM , Rating: 2
Agreed. There is nothing to say a gasoline ICE will "destroy itself" via torque any more than a diesel will.

Saying that, it is true that the design criteria are different. Diesels are expected to run for decades, gassers are designed to be inexpensive, light, and moderately long-lived.


RE: It's about time
By Bad-Karma on 2/17/2013 2:57:02 PM , Rating: 2
Ok, take your gasoline powered car down and put it on a dyno. Have it tested for its max torque curve. Then with numbers in hand, head down the high ay and hold it at max torque. Shouldn't have to hold it there more than 30 minutes before your engines blows or seizes. Usually it will be a piston rod that bends or fails.

Please don't forget to record the test.

Also, did I miss something? The article is talking about a 1/2 ton truck and the diesel intended for it. I'm not speaking to your BMW.


RE: It's about time
By Varun on 2/15/2013 1:36:09 PM , Rating: 2
I think it's great that you do your own engine work, but just FYI, diesel engines don't have short piston strokes. I'm not sure where you ever came up with that idea.

In fact, the Cummins 6.7 is an undersquare engine just like most diesel engines.
"4.21 inches bore (106.9 mm) and 4.88 inches (124.0 mm) stroke"

Gas engines certainly don't destroy themselves if used at max torque unless they are just poorly designed. A Diesel engine will normally last longer (assuming both are maintained well) due to several factors such as the fuel being a lubricant and the much lower RPM. The torque curve is there - it can be mostly flat on a lot of the newer turbo engines but that's a function of the turbo. If you don't believe me, here is the torque curve of a BMW N54 3.0L Gas engine:
http://www.n54tech.com/forums/attachment.php?attac...

Turbos give great torque curves.


RE: It's about time
By Skywalker123 on 2/17/2013 12:59:04 AM , Rating: 2
quote:
Diesels don't have incredibly "short piston strokes"...

Odd...I have IH,Cummins,PS,and Cat diesels in my vehicles, I do all my own repair work, and yes they are much shorter stoked than their gasser equivalents.


Thats odd, the Caterpillar c9 u mention in another post is has a MUCH longer stroke than most engines,

In-line 6-Cylinder, 4-Stroke-Cycle Diesel
Bore — in (mm) .................... 4.53 (115)
Stroke — in (mm) . . . . . . . . . . . . . . . . . . 5.87 (149)
Displacement — cu in (L). . . . . . . . . . . . . 567 (9.3)
Aspiration . . . . . . . . . . . . . . . . . . . . . Turbocharged


RE: It's about time
By Bad-Karma on 2/17/2013 3:07:09 PM , Rating: 2
Irrelevant, The engine is much larger in proportion than what you'll find in light duty trucks. The greater size of the block and bore is proportional to the duration of the stroke.


RE: It's about time
By Skywalker123 on 2/17/2013 5:03:46 PM , Rating: 2
quote:
Diesels have an incredibly short piston stroke which translate to huge torque numbers from the crank shaft.


This is your exact quote, the size of the diesel is IRRELEVANT give me ONE example of a short stroke diesel used in trucks of any kind. Also, i repeat, short strokes dont generate torque long strokes do.


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