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Audi A4 TDI – Click above for a high-res image gallery

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In the past, the Environmental Protection Agency (EPA) typically issued grants for the advancement of proven technologies and rarely offered up government money on projects that some would consider experimental. As environmental concerns rose in recent years, the EPA created its emerging technologies program to fund unproven, cutting-edge advancements that offer the promise of reduced emissions and improved air quality. The program kicked off in 2008 with an aim to offer assistance to companies

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Regular readers know we tend to be big fans of modern diesel engines. All the past demons that had plagued oil-burners over the years have been exorcised, including rough running, nasty smells, loud operation and narrow power bands. But sadly, modern clean diesel powerplants have never taken hold in the United States.

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Regular readers of these pages know that we tend to be big fans of modern diesel engines. Most of the past demons that had plagued oil burners over the years have been exorcised, including rough running, nasty smells, loud operation and narrow power bands. Sadly, though, for whatever reason, modern clean diesel powerplants have never taken hold in the United States.

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2010 12 Hours of Sebring – Click above for high-res image gallery

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Thomas Built Buses, the school bus manufacturing unit of Daimler Trucks North America, has just received its first order for new clean diesel buses. Montgomery County in Maryland has ordered 59 new Saf-T-Liner HDX school buses equipped with selective catalytic reduction (SCR) systems. The SCR system eliminates most nitrogen oxide emissions and allow the buses to meet the 2010 emissions standards for heavier trucks.

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Citroën's entry in the medium-large car segment is the C5. This sedan, which competes against offerings such as the VW Passat, gets updated with a couple of Euro V-compliant powertrains that reduce fuel consumption and CO2 emissions. First, the C5 gets the 1.6-liter THP turbo gasoline engine, which was co-developed with BMW and can be found in other PSA offerings as well as the Mini. This 163 hp unit replaces the 2-liter 143 hp unit and burns 7.1 l/100 km (33 mpg U.S.). The new diesel featu

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Audi A4 TDI - click above for high-res image gallery

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Audi A4 TDI - click above for a high-res image gallery

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In a rare move that probably won't attract the level of controversy or public comments that seem to be standard for EPA announcements these days (e.g.: California waiver), administrator Lisa Jackson will be in Ohio on Wednesday to talk about American Recovery and Reinvestment Act of 2009 grants for auto manufacturing communities, specifically clean diesel grants.

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We recently received a note from an anonymous source indicating that there's a mildly strained relationship between VW and some of its dealers. The source of the consternation seems to be the highly anticipated Jetta TDI, which was just recently released in the U.S. market. Apparently, Volkswagen of America has gotten complaints that some dealers are adding a significant markup on the new and desirable model -- a big problem for many automakers when a new model makes its initial introduction. Th

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Click above for a high-res gallery of the 2009 BMW 3-Series

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Mazda has declared that by the middle of the decade they will have replaced their entire powertrain lineup and cut fuel consumption by 30 percent. On the powertrain side, engines will be upgraded across the board including a new direct injected wankel rotary. In 2009, a new Smart Idle Stop system will debut that restarts the engine using the direct injection system instead of the starter. Fuel will be sprayed directly into the cylinder and ignited to get the pistons moving. New gas engines will

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