ROUSH CleanTech has developed the first available propane autogas engine certified to 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 Environmental Protection Agency’s most stringent 0.2 g/bhp-hr heavy-duty engine standard.
This new certification covers all of ROUSH CleanTech’s 6.8L 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.
