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China's first national portable emissions testing standard for heavy-duty vehicles

In September 2017, China’s Ministry of Environmental Protection issued the first national standard for portable emission measurement system (PEMS) testing of heavy-duty vehicles (HDVs). The...
Published 2017.11.15: Publication

Supplemental NOx standards for Euro IV/V HDVs in Beijing

Some heavy-duty diesel vehicles certified to the Euro IV and V standards emit excess NOx emissions when operating in low-speed, urban driving conditions. In some cases, real-world NOx emissions from...
Published 2013.07.18: Publication