Cummins engines to meet Tier 4 and Stage IIIB standards

摘要

Cummins have announced plans to develop key integrated technologies to comply with the forthcoming US EPA Tier 4 and EU Stage lllB emission standards in the l30-560kW (174-75hp) power category. According to the company, there are many ways to meet the stringent emissions regulations and, given the range of engines to which regulations apply, it is critical to match the right solution with the right application. The solutions include: controlling the by-products of combustion in cylinder; recirculation of exhaust gas to the combustion chamber; cooled exhaust gas recirculation (EGR); and various forms of treatment systems, such as lean-NOx catalysts and active paniculate filters. In their bid to reduce engine emissions, Cummins are concentrating on developing EGR and paniculate filter solutions, together with engine enhancements such as variable-geometry turbochargers, advanced electronic controls and high-pressure common-rail fuel systems.