Cummins Westport unveils new natural gas mid-range engine

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Updated May 6, 2015

Cummins_Westport_engineCummins Westport launched Tuesday at ACT Expo in Dallas its ISB6.7G, the company’s newest midrange natural gas engine.

Initially slated to be offered by Thomas Built buses, the engine will also be made available for medium duty and vocational markets.

Preliminary specs include a range of ratings from 260 hp and 660 lb-ft of torque.

CW_specsRob Neitzke, president of Cummins Westport, says the ISB6.7G is based off Cummins’ ISB6.7 diesel engine platform and will be assembled alongside it at Cummins’ medium duty engine plant in Rocky Mount, N.C.

The ISB6.7G, which will operate exclusively on CNG or LNG, features Cummins Westport’s spark-ignited, stoichiometric combustion with cooled exhaust gas recirculation (SEGR), which was first introduced in the ISLG. It features a three-way catalyst aftertreatment packaged as a maintenance-free muffler and will not require a particulate filter or SCR system.

The ISB6.7G is currently in field testing and is scheduled to be available to the market by mid 2016. It is expected to be certified at launch to meet EPA and CARB regulations and 2016 greenhouse gas standards.

Jason Cannon has written about trucking and transportation for more than a decade and serves as Chief Editor of Commercial Carrier Journal. A Class A CDL holder, Jason is a graduate of the Porsche Sport Driving School, an honorary Duckmaster at The Peabody in Memphis, Tennessee, and a purple belt in Brazilian jiu jitsu. Reach him at [email protected].