Roush produces nation’s first propane engine to meet CARB’s lowest NOx standard

Roush CleanTech announced today that it’s now offering the first propane autogas engine certified to meet California Air Resources Board’s optional low oxides of nitrogen emissions standard for heavy-duty engines with 0.02 grams per brake horsepower-hour (g/bhp-hr).

The engine is 90-percent cleaner than the current U.S. Environmental Protection Agency’s most stringent 0.2 g/bhp-hr heavy-duty engine standard.

“Last year, we introduced a propane autogas engine that was 75-percent cleaner than the EPA’s emissions standard. But we knew our next challenge was to meet CARB’s lowest NOx standard at 0.02 g/bhp-hr,” said Todd Mouw, president of ROUSH CleanTech. “Our newest propane autogas engine reinforces Roush CleanTech’s commitment to provide vehicle solutions that reduce the impact to the environment while leveraging an abundant, domestically produced fuel that costs less than diesel.”

NOx emissions are regulated under federal air quality standards and according to the EPA are harmful to human health and to the environment, contribute to regional ozone attainment challenges, smog and other air-quality issues. CARB and the EPA support operating vehicles with ultra-low emission engines which they believe can make significant improvements to regional air quality and reduce human health impacts.

“In Southern California, the development and deployment of near-zero emission vehicle technologies are critical to meeting clean air standards,” said Wayne Nastri, executive officer for the South Coast Air Quality Management District. “We congratulate Roush CleanTech on this achievement.”

This new certification covers all of Roush CleanTech’s 6.8-liter V10 3V propane engines for Class 4-7 vehicles. Installation of the new optional ultra-low NOx engines has begun with some 2018 Ford commercial vehicles and Blue Bird Vision propane school buses.

Roush CleanTech, which has deployed more than 18,000 propane autogas vehicles, will manufacture both the low-NOx 0.05 and ultra-low NOx 0.02 g/bhp-hr propane engines.

School, shuttle and transit buses and Class 4-7 medium-duty trucks equipped with ultra-low NOx engines are expected to be very competitive in seeking funding from the Volkswagen Environmental Mitigation Trust settlement.

“The certification of this ultra-clean propane engine could not have come at a more opportune time as private and public fleets can now begin applying for a piece of the $2.9 billion Volkswagen settlement funds,” said Tucker Perkins, president of the Propane Education & Research Council. “The settlement is meant to fund projects that cost-effectively reduce NOx emissions, so vehicles powered by the new ultra-low NOx Roush propane autogas engine are an ideal fit for accomplishing this goal.”