Ultra-low NOx package standard on Roush engines

June 14, 2023 By    

Roush CleanTech received California Air Resources Board (CARB) certification for 2023 propane engines at 0.02 grams per brake horsepower-hour. Previously available as an added-cost option, the ultra-low nitrogen oxide (NOx) emissions package will become standard on every propane engine sold by Roush CleanTech. The engines emit 90 percent less NOx emissions than allowed under 2023 regulations and are 60 percent cleaner than California’s 2024 low-NOx standard. Roush CleanTech first released low NOx engines in 2018. In 2021, it received CARB’s ultra-low 0.02 grams per brake horsepower-hour certification for Blue Bird school buses and commercial vehicles.

Photo: Roush CleanTech

Photo: Roush CleanTech

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