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4 comments

Why GM's 2.0-Liter Diesel is Cleaner in America's Cruze Than it is in Europe

Posted February 09, 2013 11:03 AM

From Autoblog:

The 2014 Chevrolet Cruze will have three different engine options soon, including the new 2.0-liter diesel powerplant that is debuting here at the Chicago Auto Show. The other powertrain choices include the made-in-Toledo 1.4 turbo gas engine used in the Eco and upper trim models and the 1.8-liter gas engine (made in Toluca, Mexico; it is also built elsewhere for other vehicles). The diesel is made in Kaiserslautern, Germany. In short, this is an example of GM's global network, and the oil-burner is a long-term player in the game: the basic architecture of this engine has been sold since 1985. GM sold over a half-million diesel-powered cars around the world in the last year, including 33,000 Cruze diesels. In Europe, 40-percent of Cruze sales are diesel. The engine is currently used in a number of General Motors vehicles in Europe, including Zafira, Astra and Insignia models from Opel. Well, almost. Mike Siegrist, chief engineer behind the US engine, tells AutoblogGreen that Chevrolet engineers in the US worked with GM's team in Torino, Italy to adapt the powerplant for GM's first US diesel passenger car since the 1986 Chevette. To do this, the team tinkered with four main aspects: emissions, diagnostics, environmental conditions (that is, how hot or cold it is outside) and altitude. Siegrist notes the US has higher paved roads - Mount Evans in Colorado, for example - than Europe does, and it also has stricter emissions regulations, all of which necessitated the changes. Thus, the US Cruze TD has a new intake manifold and throttle body system and an increased capacity exhaust gas recirculation (EGR) cooler that offers better NOx control, Siegrist said. A common rail piezo injection system running at 1,600 bar (the European engine runs at 2,000 bar) offers "really, really good fuel control," Siegrist says. To start in colder conditions, the US diesel engine has ceramic glow plugs while the Europeans get metal glow plugs. There is also an engine oil heater that can be plugged in if you're trying to start the Cruze in frostbite conditions.

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Guru
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#1

Re: Why GM's 2.0-Liter Diesel is Cleaner in America's Cruze Than it is in Europe

02/09/2013 7:47 PM

This is a superb example of the worst of technical journalism that seems to be so prevalent these days. It is replete with the requisite sensationalism, and appears to say something quite important, that grabs the attention of those with bees in their bonnets, but (not so close) examination shows that what is not said actually reveals more than what is said.

  • It is stated that the US engine is cleaner than the Euro engine, but not by how much. It is not stated how much this relates to the fact that the Euro engine produces more than 15% more power. How is the 'cleanness', etc. measured? Nonsense if you don't tell us, or deliberately misguiding?
  • The implication is that the GM motor is 'state of the art', ie on a par with other European motors. Europeans know that this has never been the case (far from it!), so how does this motor really compare with other motors, both US and European?
  • There are other implications that are clearly incorrect (does the US have colder conditions that northern Europe?).
  • The article does not answer the question it poses.
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#3
In reply to #1

Re: Why GM's 2.0-Liter Diesel is Cleaner in America's Cruze Than it is in Europe

02/11/2013 1:37 PM

GA - Yep, I wasted my time on this article too. I thought that I was going to learn something.

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Guru

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#4
In reply to #3

Re: Why GM's 2.0-Liter Diesel is Cleaner in America's Cruze Than it is in Europe

02/11/2013 8:40 PM

Oh, Snave and Holzfeller, you guys are being hyper critical. This article is filled with important technical details.

.

You must have skipped reading telling details, for example '..."really, really good fuel control," Siegrist says.....'.

.

What more do you want? It is 'really, really good'. Nuf said.

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#2

Re: Why GM's 2.0-Liter Diesel is Cleaner in America's Cruze Than it is in Europe

02/10/2013 2:00 AM

I will like to know what GM will do for the Mexican market. A very large area of this country is above 2100 meters (7000 feet) high, including Mexico City, Guadalajara, Puebla, Toluca and other important cicties. Mexico City (2240 m high) is surrounded by mountains that trap the exhaust emmissions unless strong winds sweep the pollution away.

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