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LOUISVILLE, Ky. — Independent engine maker Cummins Inc. said it is introducing its “SuperTruck” research done in conjunction with Paccar Inc. into commercial production between now and the end of this decade, with much of it expected in 2016 or 2017, when the federal government is scheduled to tighten its standards for truck engine fuel economy.

Engine maker Cummins Inc. and component manufacturer Eaton Corp. unveiled a new powertrain package for the North American heavy-duty truck market that they said will boost fuel economy by 3% to 6%.

Truck and auto component maker Dana Holding Corp. said it introduced a new driveshaft and inter-axle shaft, designed for greater torque and durability.

Engine maker Cummins Inc. and component manufacturer Eaton Corp. unveiled a new powertrain package for the North American heavy-duty truck market that they said will boost fuel economy by 3% to 6%.

Accuride Corp. posted a $156.5 million fourth-quarter loss, citing a charge related to its Gunite division.

Component supplier Commercial Vehicle Group said Friday that CEO Mervin Dunn will retire this year but will remain in the post until a successor is appointed.

Truck makers and suppliers say they will be among the industries hardest hit by a new federal rule that could cost U.S. businesses nearly $8 billion to search out and shed “conflict minerals” originating from central Africa.

Vehicle parts manufacturer Visteon Corp. posted a fourth-quarter profit, improving upon the loss it experienced during the same time in 2011.

Ritchie Bros. Auctioneers said its fourth-quarter profit slipped from a year ago to $22.1 million, or 21 cents per share, from $26.8 million, or 25 cents, a year ago.