Nachrüstlösung zur Erfüllung der U.S. Tier 0 Emissionsgesetzgebung bei Zweitakt-Lokomotivmotoren

Autoren

Dr. Patrick Hupperich, Dr. Dean Tomazic, FEV Engine Technology, Auburn Hills, Michigan, Dr. Bhupinder Dayal, Eric Laribee, John Whelan, GE Rail, Erie, Pennsylvania

Jahr

2005

Zusammenfassung

In 1998 EPA enacted regulations on U.S. railroads that scheduled three tiers of emissions reduction. The first level, Tier 0, was established to achieve an average NOx reduction in the order of 30%, and applies to locomotives originally manufactured from 1973 to 2001. In general, Tier 0 can be achieved with retarded injection timing, however at the expense of higher fuel consumption. Railroads therefore desire high technology kits that will minimize the fuel consumption penalty associated with Tier 0 compliance. Because of a locomotive engine’s long life, a significant overall improvement in the original design of the parts is feasible as part of periodic remanufacturing. Since these improvements in design usually occur in the power assemblies, including the emission-critical parts, remanufacturing can be used to enhance the engine in terms of emission performance. The paper describes the development and validation of a production-feasible retrofit kit for remanufacturing of two-stroke locomotive engines to achieve Tier 0 compliance, while offering uncompromised fuel consumption and reliability. The performance and emissions development entailed the optimization of injection timing and injector layout, combustion chamber design and turbocharger matching.

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