The U.S. Environmental Protection Agency on July 14 filed a lawsuit against truck maker Navistar International Corp. alleging that the company in 2009 began the manufacture of 7,750 heavy-duty diesel ...

Rival truck and engine makers have joined forces in asking the U.S. Court of Appeals to revoke environmental compliance certificates granted to Navistar Inc. by the U.S. Environmental Protection ...

Federal appellate judges this week again tossed out a U.S. Environmental Protection Agency (EPA) rule that allowed for the approval of Navistar’s heavy-duty truck engines that did not meet 2010 ...

MTU America Inc., a subsidiary of Rolls-Royce Power Systems AG, will implement an auditing program to ensure proper emissions testing and compliance with federal emission standards for its heavy-duty ...

(CN) - MTU America Inc., a manufacturer of heavy duty diesel engines, will pay $1.2 million and place stronger controls on its emissions testing program to settle EPA claims it violated the Clean Air ...

Omnitek Engineering Corp. announced it has received a Certificate of Conformity from the U.S. Environmental Protection Agency (EPA) applicable for diesel-to-natural gas engine conversions of the ...

Omnitek Engineering Corp. said it has received approval from the U.S. Environmental Protection Agency (EPA) for its Detroit Diesel Series 60 engine families for model-years 1988 to 2009. The ...

The dispute over Navistar International Corp.’s failed emissions strategy continues long after the truck maker pulled the plug on its exhaust gas recirculation (EGR)-only technology: The Environmental ...

TAMPA, Fla.--(BUSINESS WIRE)--Feb. 1, 2006--Hybrid Fuel Systems, Inc., ("Hybrid" or the Company") (OTCBB: HYFS) today announced the receipt of the US Environmental Protection Agency (EPA) Conversion ...

Wärtsilä said it has been awarded model year 2017 certification of emissions compliance from the U.S. Environmental Protection Agency (EPA) for its Wärtsilä 34DF dual-fuel engine family. The EPA Tier ...