VANCOUVER, B.C. — Cummins Westport (CWI), a provider of high-performance alternative fuel engines for the global market, has received formal certification from the U.S. Environmental Protection Agency (US EPA) for levels of NOx and particulate matter (PM).
The ISL G is the worlds first heavy-duty engine for urban bus and truck applications to be certified to the 2010 EPA standard, said Guan Saw, president of Cummins Westport. With improved low-end torque and maintenance-free aftertreatment, the ISL G will deliver diesel-like performance and reliability and the opportunity for customers to take advantage of the lower cost of natural gas.
The ISL G surpasses EPA 2007 phase-in levels and meets 2010 emission standards of 0.2 g/bhp-hr NOx and 0.01 g/bhp-hr PM.
Based on the Cummins ISL, the ISL G leverages Cummins Exhaust Gas Recirculation (EGR) with stoichiometric combustion allowing for the use of a three-way catalyst, which is maintenance free and is in common use in passenger cars.
In addition to delivering ultra low emissions, the ISL G, with ratings from 250 to 320 horsepower, will deliver increased thermal efficiency and more than 30% higher low-speed torque compared with todays CWI Plus engines.
Cummins Westport has already logged more than 500 orders for the ISL G from U.S. transit properties, including Sacramento Regional Transit and the Orange County Transportation Authority (OCTA).
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