What is the New Source Performance Standards (NSPS) and what does this regulation have to do with three-way catalysts?
The NSPS, regulated by the Environmental Protection Agency, is a set of air quality standards of performance for stationary, spark ignited internal combustion engines and national emission standards for hazardous air pollutants for reciprocating internal combustion engines. The regulation sets new engine emissions standards for NOx, CO, VOCs and HC. To view the final ruling go to: http://www.epa.gov/ttn/atw/area/fr18ja08.pdf. • When a spark-ignited, rich-burn engine is retrofitted with a three-way catalyst that is correctly sized for that engine, it will meet the NSPS regulations bringing the engine into compliance with EPA standards. • Owners who do not bring their engines into compliance using retrofit technology (such as a TWC) in accordance with NSPS regulations, may face fines and/or not be allowed to operate their engines.
