Diesel engine manufacturer Cummins Inc. said it believes it will receive U.S. Environmental Protection Agency (EPA) certification for its ISM engine before a new EPA nitrogen oxide emissions standard goes into effect on Oct. 1.
The ISM engine is available in up to 450-horsepower (hp) and is used on diesel pusher chassis for highline motorhomes.
In a statement issued a week ago (May 21), Cummins reported that it submitted its ISB engine to the EPA for certification under the agency’s 2.5-gram NOx-NMHC standard that is scheduled to go into effect Oct. 1. The ISB engine is available in up to 260-hp.
Cummins believes the ISB will satisfy the EPA standard through the use of a “cooled exhaust gas recirculation (EGR) subsystem” that has been used on ISB engines in Europe for over a year. The new ISB engines in Europe are “proving to be a performance and reliability leader,” according to the Columbus, Ind.-based company.
Cummins, in the May 21 statement, reported that it anticipates getting EPA certification for the ISB by “mid-summer.”
Meanwhile, Cummins reported it is “on the path” towards obtaining EPA certification for the ISM “prior to the October deadline.”
Freightliner Custom Chassis Corp. revealed today (May 28) that it will introduce a new chassis during the RV industry’s National Trade Show in December that will include a new 505-hp Caterpillar C-12 engine that will satisfy the EPA regulation going into effect Oct. 1.
The new Freightliner chassis, which has not been assigned a brand name yet, will replace its Powerliner Series that comes with a 450-hp Cummins ISM engine.