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SCR vs. Advanced EGR: The face-off in Louisville had all the earmarks of a hotly contested debate, with competing manufacturers and suppliers assembling their best arguments and putting on their most compelling displays while attempting to sway opinion as to why one 2010 clean-engine technology is better than the other.

LOUISVILLE, Ky. — Navistar Inc. said it soon will introduce a 15-liter engine, which combines the fuel-induction technology of its 11-liter and 13-liter MaxxForce models with the block and other basic components of a Caterpillar C15 power plant.

The Environmental Protection Agency last week launched a program that could give fleet owners up to 25% of a new vehicle’s cost for every diesel truck it replaces with a diesel-electric hybrid, liquefied natural gas or other alternate-fueled engine.

LOUISVILLE, Ky. — Cummins Inc. said it is confident the Environmental Protection Agency will approve the company’s use of copper zeolite in engines de-signed to meet 2010 emission rules, removing any potential roadblock for the new models.

Transportation officials in Colorado said initial feedback from commercial drivers who have used the AutoSock, a heavy-duty cloth covering for tires, has been positive, and it could become an accepted alternative to metal snow chains.

LOUISVILLE, Ky. — Truck and engine makers took advantage of one of the last major marketing forums before the onset of new federal emission rules to starkly set the stage for buyers of heavy-duty vehicles in choosing between SCR and EGR for their diesel engines.

LOUISVILLE, Ky. — Truck and engine makers’ work on selective catalytic reduction technology has convinced the U.S. Environmental Protection Agency to abandon its “historical hesitancy” on that approach to emissions control.

As I write this in early March, the U.S. Department of Energy reports that the price of diesel fuel in the United States is $2.045 per gallon. After hitting a record high of $4.764 on July 14, the price of diesel has fallen by $2.719.