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Low NVH for New Duramax 4500GM's new light-duty diesel to be quiet, cleanPosted Image

By RICHARD TRUETT | AUTOMOTIVE NEWS

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AutoWeek | Updated: 07/16/07, 11:16 am et

DETROIT -- The 4.5-liter turbocharged diesel engine that General Motors plans to introduce in 2010 in light-duty pickups will have breakthrough technology in emissions and noise reduction, says the engine's assistant chief engineer, Jim Minneker.

The new diesel is being designed to meet the most stringent federal and California emissions standards and will be available in all 50 states, Minneker said. It will use a urea injection system to control oxides of nitrogen, or NOx.

But GM won't be part of the German Bluetec alliance of Mercedes-Benz, Volkswagen, BMW and Audi. Those automakers plan to sell their clean diesels under the Bluetec banner.

Although he wouldn't get into specifics, Minneker said the new engine will have advanced technology that reduces the production of NOx in the cylinder. NOx is suspected of causing cancer.

Another goal, he said, is to make the new diesel engine the smoothest and quietest in the industry - something GM may have to do to silence critics who remember the automaker's troublesome diesels of the late 1970s and early 1980s.

GM has been granted a patent for the engine's crankcase and has applied for more patents for the fuel and emissions systems, said Minneker, a 37-year GM powertrain veteran.

In other diesel developments, GM confirmed last week that it plans to install diesel engines in Cadillac and Saturn cars and crossover vehicles in 2010.

GM will use a 2.9-liter V-6, made in Italy by VM Motori, in the Cadillac CTS and Saturn Aura.

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I was going to say the D.D. is already clean & quiet!

But a 4.5 liter diesel sounds awsome. :)

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To bad GM no longers owns Detroit Diesel. It is now a division of Daimler. Another stupid move on GM's part, now when GM needs diesel engines more than ever.

yup, with Penske as an intermediary buyer for a couple? of years.

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The Monster called DURAMAX DIESEL baby!!! Among the best diesels in the industry.

My bad. i never hear the "diesel" used as part of the Duramax name the way it is with Detroit Diesel, but of course it makes a lot of sense.

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To bad GM no longers owns Detroit Diesel. It is now a division of Daimler. Another stupid move on GM's part, now when GM needs diesel engines more than ever.

Detroit Diesel hasn't made engines that small for a very long time, and not even the medium trucks use engines in the size class supplied by Detroit Diesel. Unless someone thinks a 10-12 L 150 hp I6 diesel would have made a nice choice for the Sixteen, it's not a great loss as far as diesel engine offerings.
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