Blue Bird first to offer certified ultra-low NOx level for propane school buses; 0.02 g/bhp-hr
Green Car Congress
AUGUST 15, 2018
Blue Bird’s Vision Propane buses now offer an optional ultra-low NO x engine—developed in partnership with Roush CleanTech, and certified by both the EPA and California Air Resources Board at 0.02 CARB has further encouraged engine manufacturers to reduce levels below the current mandatory EPA standard of 0.2
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