Issue: May 2009


Cummins Westport ISL G In Use Test Results Beat 2010 Emissions Regulations



by Lenny Case

Cummins Westport, a leading provider of high-performance, alternative fuel engines for the global market, announced today that an ISL G in-use emissions test performed on an urban transit bus recorded emissions significantly lower than the 2010 EPA and California Air Resources Board (CARB) Heavy Duty emission regulations.

"The ISL G continues to demonstrate low emission and performance benefits as field results are obtained," said Gordon Exel, Vice President and GM - Americas at Cummins Westport. "ISL G emissions below 2010 emission regulations in both the laboratory and on the road with simple, maintenance free three way catalyst aftertreatment is an important benefit for our customers."

The Cummins Westport (CWI) 8.9 litre ISL G natural gas engine features new combustion technology (Stoichiometric Cooled EGR) that enabled the ISL G to be the first heavy duty engine to meet the 2010 EPA emissions regulations.

To test the ISL G not only in the laboratory, but more importantly out in the real world under real-world vehicle operating conditions, Cummins Westport with the support of Sacramento Regional Transit District commissioned Sensors Inc., a global leader for Portable Emissions Measurement Systems (PEMS), to perform an in-use tailpipe emissions test in accordance with EPA's Heavy Duty In-Use Testing guidelines.

The test was conducted on a 2008 40 foot Orion VII Low Floor natural gas bus powered by an ISL G 280, driven by a Sacramento Regional Transit bus driver on city and highway routes. The U.S. EPA in-use testing procedures were designed such that the heavy-duty engine emissions are controlled over the full range of speed and load combinations commonly experienced in vehicle applications.

Sensors Inc. concluded that emissions were significantly lower than the 2010 EPA Heavy Duty in use emission requirements.

Cummins Westport Inc. manufactures and sells the world's widest range of low-emissions alternative fuel engines for commercial transportation applications such as trucks and buses. CWI is a joint venture of Cummins Inc. (NYSE: CMI), a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems, and Westport Innovations Inc. (TSX: WPT)(NASDAQ: WPRT), a leading developer of technologies that allow engines to operate on clean-burning fuels such as natural gas, hydrogen, and hydrogen-enriched natural gas (HCNG). www.cumminswestport.com

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