Cummins Westport announced that it has received certifications from both the U.S. Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) for its 2018 L9N and B6.7N natural gas engines. Both engines meet CARB optional Low NOx standards, as well as 2017 EPA greenhouse gas emission (GHG) requirements, making them some of the cleanest engines available today for truck and bus customers.
The L9N is certified to CARB optional Low NOx standard of 0.02 g/bhp-hr—a 90 percent reduction from engines operating at the current EPA NOx limit of 0.2 g/bhp-hr. The L9N offers ratings from 250 to 320 horsepower and 1,000 lb-ft peak torque, making it ideal for transit, shuttle and school bus, as well as medium duty truck and refuse applications.
The B6.7N is certified to CARB optional Low NOx standard of 0.1 g/bhp-hr—a 50 percent reduction from current EPA levels. Available with ratings from 200 to 240 horsepower and 560 lb-ft peak torque, the B6.7N is a great fit for school bus, shuttle, and medium duty truck applications.
Based on the ISL G and ISB6.7 G natural gas engines, the 2018 L9N and B6.7N build on the experience gained from over 80,000 Cummins Westport engines currently in service and provide a present-day solution to urban air quality issues. In addition to ultra low emissions, the L9N and B6.7N feature a new engine control module with improved durability, on-board diagnostic (OBD) capability, an enhanced maintenance-free three-way catalyst, and a closed crankcase ventilation system.
“Cummins Westport is proud to offer emissions-leading products for our truck and bus customers,” said Rob Neitzke, President of Cummins Westport. “The L9N and B6.7N engines offer customers reliability and performance with near-zero emissions today. Natural gas engines are a mature technology, and are supported by an established fueling and supply infrastructure, enabling fleets to incorporate near-zero emissions technology into their fleets.”
All CWI engines offer customers the choice of using CNG, LNG and RNG as a fuel. RNG is pipeline-quality natural gas produced from the decomposition of organic waste, which can come from a variety of sources such as dairy farms, landfills, and urban waste treatment plants. Combining Cummins Westport’s ultra low emission engines with RNG fuel provides additional and significant GHG reductions.
For 2018, the L9N and B6.7N will be available as a first-fit option from leading bus and truck manufacturers. Cummins Westport will also introduce the ISX12N natural gas engine as a first-fit option, which like the L9N, will meet the Optional Low NOx emissions level of 0.02 g/bhp-hr. Production of all three engines will begin in the first quarter of 2018.
The Gas Technology Institute, South Coast Air Quality Management District, SoCalGas, and the California Energy Commission provided engine development funding support.