What is the Tier / Stage emission standard?

TIER - the emission standard of North America, its European equivalent is the STAGE emissions standard.

Both standards apply to exhaust emissions in specialized vehicles such as agriculture, construction, etc.

HC - węglowodory

NOx - tlenki azotu

PM - cząstki stałe

To achieve the lowest emissions of NOx NOx, manufacturers use the Selective Catalytic Reduction (SCR) system from Interim Tier 4 / Stage IIIB.