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Non VW Group Diesels This section is for discusion of Non VWGroup Diesels.

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Old April 1st, 2012, 04:54   #166
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Default 2013 Cruze Diesel Being Tested with a Jetta TDI

Chevy is apparently serious about actually bringing the Cruze diesel in 2013. Nice to see another manufacturer get into the ring but odd choice of car for that engine as it would be better in almost any other vehicle they produce except the spark.

http://blogs.insideline.com/straight...he-desert.html
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Old April 2nd, 2012, 05:40   #167
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Isn't Cruze one of the top selling models for the 2012 model year? Why not put the diesel engine into their top seller. Much easier than trying to convince the public to purchase the Cruze diesel instead of something that is not moving. Of course, best bang for the buck would be to put one in the C1500.
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Old April 2nd, 2012, 05:48   #168
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Quote:
Originally Posted by kjclow View Post
Isn't Cruze one of the top selling models for the 2012 model year? Why not put the diesel engine into their top seller. Much easier than trying to convince the public to purchase the Cruze diesel instead of something that is not moving. Of course, best bang for the buck would be to put one in the C1500.

Why not? Because it already IS one of their top sellers. Because Americans already think 30 MPG is 'good'. Because our dumbassed emissions laws don't favor them. Because it makes sense. Same reason we get screwed year after year.
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Old April 4th, 2012, 13:04   #169
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Quote:
Originally Posted by Holmie View Post
Chevy is apparently serious about actually bringing the Cruze diesel in 2013. Nice to see another manufacturer get into the ring but odd choice of car for that engine as it would be better in almost any other vehicle they produce except the spark.

http://blogs.insideline.com/straight...he-desert.html
Wow that article is from August of last year.
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Old April 11th, 2012, 04:39   #170
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Just one more comment about urea: You're also screwed running biodiesel with it. Can't believe folks on here are so receptive to it. It's just a poor patch to attain emmissions compliance using old diesel engine technology in new skin.
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Old April 11th, 2012, 04:44   #171
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Can't run anything over B5 anyways, even without AdBlue. Check your manual.
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Old April 11th, 2012, 06:27   #172
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Technically, all TDIs are only allowed to run B5 in the US to maintain warranty.

However, they actually mean it on all of the VWs with DPFs, due to the in-cylinder post-injection that VW uses (however, Ford is getting B20 compatibility on the same system).

So, a 2006-2008 Touareg V10 TDI has a DPF, nothing else.

A 2009-present Touareg or Q7 V6 TDI, or a 2012-present Passat TDI, has a DPF and urea. Urea is injected downstream, for neutralizing NOx, and its behavior is unrelated to biodiesel use. The DPF is the problem, not the urea.

A 2009-present Jetta, SportWagen, or A3, or a 2010-present Golf, or a 2013-present Beetle TDI, has a DPF, a NOx trap, and an H2S trap. This requires more post injection than any of the DPF+urea cars.

This makes the DPF+urea cars better for biodiesel. It also means they get significantly better fuel economy on any fuel.
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Old May 2nd, 2012, 10:37   #173
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Diesel-Powered Chevy Cruze May Be a Tough Sell
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Old May 2nd, 2012, 11:08   #174
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Yup. Wasn't it you, Dave, who predicted a convergence of diesel and gasoline engine technology?

In the last ten years...

Diesel compression ratio's have gone from 19.5:1 to 16:1
Gasoline compression ratio's have gone from 10:1 to 13.5:1

Diesel used to have fuel economy advantage relative to best-in-same-class car w/gasoline engine of

45mpg/$2.0/gal = 22.5 miles/dollar
______________
versus gasoline:
29 mpg/$2.20/gal = 13.2 miles/dollar

Advantage, 2002: Diesel was 70% better miles/dollar ten years ago



Now:

35 mpg/$4.40/gal = 8 miles/dollar
______________
versus gasoline:
35 mpg/$3.99/gal = 8.8 miles/dollar

Advantage, 2012: gasoline gets 10% better miles/dollar versus best-in-same-class diesel.




If they ever get HCCI technology working for GDI engines, diesel's days might be numbered.
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Old May 2nd, 2012, 16:30   #175
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Originally Posted by nicklockard View Post
If they ever get HCCI technology working for GDI engines, diesel's days might be numbered.
Somewhere in between the subsidies and the financial finagling, diesel has gotten the short end of the whip. (Whip... crack... get it?)

In dollars, what is the cost of:

Removing sulfur from diesel fuel?

Removing sulfur from gasoline?

The cost of cracked gasoline vs. diesel pre-sulfur removal?

How much would the above cost/provide (in yottajoules, please) over the period of Earth's human habitation lifespan?

Why do Americans consider gasoline to be the champagne of fuels?

I suppose I always have been more partial to beer...

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Old May 3rd, 2012, 05:37   #176
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Costs? no idea but if you look at "old" refining processes of just running the crude through a distillation column, diesel comes out fairly early in the process and different grades of gasoline come out at a much higher temperature. I believe that most crude is initially run through the distillation column and the resulting fractions are then run through the cracker to force higher production of more profitable end products.
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Old May 3rd, 2012, 11:22   #177
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Originally Posted by kjclow View Post
Costs? no idea but if you look at "old" refining processes of just running the crude through a distillation column, diesel comes out fairly early in the process and different grades of gasoline come out at a much higher temperature. I believe that most crude is initially run through the distillation column and the resulting fractions are then run through the cracker to force higher production of more profitable end products.
Other way. Diesel's b.p. is higher, so it takes more temperature. Gasoline comes off the fractional distillation stack higher up. Boiling point of a compound fraction is inverse to height on the stack. Cracking, to my knowledge, can only shift the balance a few % points.
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Old May 3rd, 2012, 11:58   #178
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yep, I was looking at the fractions coming out, not the temp. You can actually shift the balance quite far these days, depending on the crude stock and age of the refinery. I've heard of percentages in the 10 to 15% range.
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Old May 3rd, 2012, 12:03   #179
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Quote:
Originally Posted by nicklockard View Post
Other way. Diesel's b.p. is higher, so it takes more temperature. Gasoline comes off the fractional distillation stack higher up. Boiling point of a compound fraction is inverse to height on the stack. Cracking, to my knowledge, can only shift the balance a few % points.
@Nick - I claim no expertise in petroleum refining, but it is my understanding from previous discussions here at tdiclub and other forums that straight distillation yields much greater volumes of middle distillate than "straight-run" gasoline (e.g., http://www.theoildrum.com/node/2174), and that some middle distillate is actually "cracked" to gasoline. The shortfall in middle distillate is apparently made up by cracking the heavier residuals to something called "light cycle oil" (LCO). LCO supposedly has similar properties to "straight-run" middle distillate, but has a much lower cetane number (~20; straight-run middle distillate 50-55). The relatively large quantities of LCO combined with the straight-run middle distillate is the reason for the low quality of U.S. diesel fuel, or so I understand it.
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Old May 3rd, 2012, 16:56   #180
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Default Chevrolet Primed for Rising Demand for Diesel Cars

http://media.gm.com/media/ba/en/chev...26_dieselmyths

DETROIT – The planned U.S. introduction of a 2.0L clean turbo diesel version of the Chevrolet Cruze next year is expected to benefit from growing interest in diesel cars, sales of which could double by mid-decade, according to market research firm Baum and Associates.
Diesel car sales, which account for 3 percent of U.S. sales today, are trending up, having jumped 35 percent in the first quarter of 2012 compared to the same period in 2011. Diesel car sales grew more than 27 percent last year, according to the Diesel Technology Forum. Baum and Associates predicts diesel to account for 6 percent of car sales by 2015
General Motors sold more than half a million diesel-powered cars across Europe, Asia, Africa and South America last year, including 33,000 Cruzes.
The North American introduction of a diesel engine on Cruze – one of the top-selling gasoline-powered cars in the U.S. in 2011 and General Motors’ best-selling model globally – is expected to establish Chevrolet as the only domestic automaker offering an American- manufactured diesel-powered compact car with a European-American developed engine.
“Even with high fuel prices, we’re seeing more consumers willing to invest in more advanced technology, fuel-efficient vehicles,” said Allen Schaeffer, executive director of the Diesel Technology Forum, a non-profit educational organization. “We’re really excited about what the Chevy Cruze brings to this segment. It’s already a successful car in its fuel efficiency and market acceptance. With GM’s advanced clean-burning diesel technology under the hood, Cruze stands to be a game changer.”
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