Cummins Westport’s ISL G Near Zero (NZ) NOx natural gas engine is the first MidRange engine in North America to receive emission certifications from both U.S. Environmental Protection Agency (EPA) and Air Resources Board (ARB) in California that meet the 0.02 g/bhp-hr optional Near Zero NOx Emissions standards for medium-duty truck, urban bus, school bus and refuse applications.
Cummins Westport says ISL G NZ exhaust emissions will be 90 percent lower than the current EPA NOx limit of 0.2 g/bhp-hr and also meet the 2017 EPA greenhouse gas emission requirements. CWI natural gas engines have met the 2010 EPA standard for particulate matter (0.01 g/bhp-hr) since 2001.
“These North America emission certifications result in a game-changing reduction in urban tailpipe and engine related emissions,” says Rob Neitzke, President of Cummins Westport Inc. “This, combined with the reliability and operating improvements on the base ISL G engine, puts CWI natural gas engines at the forefront of cost-effective and dependable emission reduction strategies in transit, medium-duty truck and refuse applications.”
ISL G NZ meets the ARB certification 8 years in advance of the 2023 California Near Zero NOx schedule contributing to California Clean Air initiatives. ARB has defined this certified Near Zero emission level as equivalent to a 100% battery truck using electricity from a modern combined cycle natural gas power plant.
More than 40,000 natural gas powered trucks and buses operate in North America and the new ISL G NZ will power Near Zero emission trucks and buses at a significant discount to the cost of electric powered vehicles. In addition to the dramatic 90 percent reduction in NOx, the ISL G NZ will feature Closed Crankcase Ventilation (CCV) reducing engine related methane emissions by 70 percent.
Cummins Westport natural gas engines do not require active aftertreatment such as a Diesel Particulate Filter (DPF) or Selective Catalytic Reduction (SCR).
Production of the ISL G NZ is expected to begin in April 2016 and the engine will be made available as a first fit engine with transit and refuse OEMs, and as an engine replacement for existing ISL G vehicles, resulting in an immediate NOx emission reduction well before the 2023 Near Zero NOx goals set in California.
Performance and efficiency will match the current ISL G, with engine ratings from 250-320 horsepower, and 660-1,000 lb-ft torque available.