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The final generation of diesel truck engines manufactured by Caterpillar Inc. has generated yet another civil lawsuit, this one filed by Minnesota carrier Scenic Boundaries Trans Inc.

A bill that trucking industry stakeholders have said would ban the registration of new diesel vehicles in the District of Columbia beginning in 2018 was “misinterpreted” by the industry, the city’s environmental legislative director said.

Class 8 engine installations in North America plummeted during the first half of 2013, dropping 21.2% to 119,057, WardsAuto.com reported.

Engine maker Cummins Inc. said it is boosting its quarterly dividend 25%, reflecting its “confidence in the long-term prospects for the company.”

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%.

Engine maker Cummins Inc. said Wednesday it has revised its previously announced fourth-quarter and full-year 2012 operating results down by $20 million, with net income reduced by $12 million, or 7 cents per share.

Independent engine maker Cummins Inc. extended its lead as the primary supplier to the North American heavy-duty diesel truck market last year, growing its market share to 40.4%, from 39.1% in 2011, WardsAuto.com reported.

Cummins Inc.’s fourth-quarter operating profit and sales fell on weaker North American trucking and construction markets, the engine maker said Wednesday.

Cummins Inc. said it has received federal certification that its new 15-liter engine meets the coming 2014 greenhouse-gas standards, the latest sign that North America’s heavy-duty truck and engine makers are making headway in preparing for the new rule.