Canada / USA - Cummins Westport Inc (CWI), the Vancouver-based joint venture between Cummins Inc of Columbus, Indiana, USA and Westport Fuel Systems of Vancouver, Canada has received certifications from both the US Environmental Protection Agency (EPA) and Air Resources Board (ARB) in California for its B6.7N natural gas engine. Like the Cummins Westport ISX12N and L9N engines, the B6.7N meets California ARB optional Low NOx standard of 0.02 g/bhp-hr, a 90% reduction from engines operating at the current EPA NOx limit of 0.2 g/bhp-hr. The B6.7N also meets 2021 EPA greenhouse gas emission (GHG) requirements.       

The B6.7N natural gas engine is available with ratings from 200 to 240hp and up to 560lb-ft of peak torque. The B6.7N is designed for truck, school bus, and shuttle bus. Like Cummins Westport’s L9N and ISX12N engines, the B6.7N features on-board diagnostics, an enhanced, maintenance-free three-way catalyst, a closed crankcase ventilation system, and an engine control module recently redesigned for improved durability.