Kenworth Truck Co. will build liquefied natural gas (LNG) powered trucks in Renton beginning next year.

The Kirkland-based subsidiary of Paccar Inc. (NASDAQ: PCAR) will build its Kenworth T800 LNG trucks using fuel system technology from Westport Innovations Inc. of Vancouver, British Columbia.

The Westport technology will be installed in the Cummins ISX 15-liter truck engine.

Kenworth and Westport previously teamed up to offer the LNG-powered Kenworth trucks in an aftermarket conversion process on trucks used by the ports of Los Angeles and Long Beach. Those California ports recently approved a $1.6 billion plan to replace nearly 17,000 heavy-duty trucks that serve the ports with LNG-powered vehicles by 2012.

Westport’s LNG fuel system, according to Kenworth, is the only alternative fuel technology eligible for financial support as part of the ports’ new program.