Westport Innovations has delivered its first liquefied natural gas, or LNG, heavy-duty fleet truck to Raley's Supermarkets, a customer of Cummins.

The sale to Raley's, first announced a year ago, is part of a three-truck prototype development project announced in November 1999 by Westport and Cummins. Cummins is supplying its ISX model engines for the project.
Westport, a Vancouver-based developer of natural gas fuel systems, has also commissioned a truck upfitting operation in Sacramento, Calif., at a facility owned by Cummins West, a distributor of Cummins engines.
Westport's patented High Pressure Direct Injection (HPDI) technology allows a diesel engine to burn diesel fuel only as a pilot to achieve ignition. The majority of the power comes from a separate injection of natural gas into the engine cylinder as the diesel fuel ignites. The technology is intended to retain all of the performance and fuel economy of diesel engines while meeting future U.S. Environmental Protection Agency emissions targets.