Cummins Westport‘s L9N and B6.7N natural gas engines received U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB) certifications for 2018, the company announced Wednesday. Both engines meet CARB’s optional Low NOx standards, as well as 2017 EPA greenhouse gas emission (GHG) requirements, putting them among the cleanest engines available today for trucks and buses.
The L9N is certified to Californial ARB 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 – 320 hp 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 California ARB optional Low NOx standard of 0.1 g/bhp-hr – a 50% reduction from current EPA levels. Available with ratings from 200 – 240 hp 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.
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.