Emissions Regulations
The EPA and EU are at the forefront for establishing the most stringent standards in effect today. Exhaust performance and testing requirements put the responsibility on the manufacturer to design and establish the most advanced engine control technology available. Implementation of the emissions regulations are in tiers with exhaust requirements becoming more stringent at each step.
Tier 1/Stage I and Tier 2/Stage II
Required manufacturers to optimize fuel injection and combustion performance; internal engine modifications.
Tier 3/Stage IIIA
Required an approximate 60 percent reduction in particulate matter (PM) and a 50 percent reduction in oxides of nitrogen (NOX) from first standards established in 1996.
Tier 4/Stage IIIB
Will further reduce both PM and NOX emissions by approximately 90 percent; nonroad engines will be at near-zero levels.