NREL – August 2004
This project was part of the Next Generation Natural Gas Vehicle activity, which is supported by the FCVT Program, the South Coast Air Quality Management District, and the California Energy Commission. One goal of this activity is to develop advanced, commercially viable, medium- and heavy-duty natural gas engines and vehicles that will meet EPA 2007/2010 heavy-duty emission levels before 2007.
The project was led by DOE’s National Renewable Energy Laboratory (NREL), Cummins, Inc., and Westport Innovations, Inc. The 15L ISX G engine is a Cummins ISX diesel engine modified to use the Westport-Cycle™ high-pressure direct-injection (HPDI™) fuel system.
Read More: http://www.nrel.gov/vehiclesandfuels/ngvtf/pdfs/36252.pdf