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The Manufacturers of Emission Controls Association said its members sold 24,640 diesel engine retrofit devices in 2010.

The Manufacturers of Emission Controls Association said even though its members installed more than 24,000 diesel retrofit devices last year, more government incentives are needed to upgrade the older diesel engines in operation.

State and federal grants totaling $585,000 will help 15 trucking companies in Utah install auxiliary power units, the Associated Press reported.

LOUISVILLE, Ky. — Navistar Inc. has introduced the ProStar Plus, a lighter, more fuel-efficient version of its ProStar Class 8 tractor.

Congress should include comprehensive funding policies in the upcoming transportation reauthorization bill both to modernize freight transportation and reduce diesel emissions, an environmental group said in a new report.

California’s South Coast Air Quality Management District is offering incentive funding of up to $50,000 for the purchase of a diesel truck or up to $100,000 for the purchase of a natural gas truck, in return for scrapping an older Class 8 diesel truck, the agency said.

Flatbed carrier Arrow Trucking Co. closed suddenly Dec. 22, shutting off its fuel cards and leaving an unknown number of drivers for its 1,400 trucks stranded around the country, industry and federal officials have said.

Today’s new diesel-power trucks are, by law, equipped with particulate filters, and in many models the DPF will soon will be joined by another aftertreatment device — selective catalytic reduction, or SCR, in a canister.

Donaldson Co., a manufacturer of filtration systems, said Monday it is spending $5 million to enable one of its plants to manufacture parts that comply with the Environmental Protection Agency’s 2010 diesel emission standards.