From 2012 on, diesel engines for locomotives will have to fulfil the tightened emission regulations of EU non-road guideline 97/68/EG Stage IIIb. Compared to Stage IIIA, the prescriptive limits for nitrogen oxides have been reduced by 39 %, the limits for particulate emissions even by 88%. The new MTU Series 4000 R44 complies with the emission limits of Stage IIIb. Initially, a 12 and 16V engine will be available from 2012, later to be followed by 8 and 20V versions. The new Series 4000 will cover a power range from 1,000 kW to 3,000 kW for the application in diesel-electric or diesel-hydraulic main-line locomotives and shunters. The MTU Series 4000 has been used for more than 10 years as main drive (oder traction) for diesel locomotives operating worldwide. Right from the start, MTU Series 4000 engines have distinguished themselves by their excellent values regarding economic efficiency, reliability and power-to-weight ratio. The new Series 4000 R44 is a logical further development of the current Series 4000 R43 which entered the market in 2009. It is developed with the aim of retaining as much tried and tested technology of the predecessor series as possible. Customer interfaces and main dimensions of the engine are adapted only slightly and in close cooperation with the customers. All new technologies have undergone an intensive testing and qualification program for several years. Until the start of standard series production in 2012, several thousand hours of prototype engine operation on the test stand and in the field will be completed. The EUIIIb NOx limit (NOx+HC < 4 g/kWh) is complied with exclusively by means of engine-internal technologies (without SCR catalyst) while a diesel particle filter makes it possible to stay below the particle limit (PM < 0.025 g/kWh). In addition to the cooled exhaust gas recirculation and an optimized valve timing (Miller cycle), the newest generation of the LEAD R common rail injection system (made by L'Orange) and the MTU 2-stage turbocharger system are the outstanding features of the new engine design. Based on these advanced engine-internal technologies, it was possible to realize low particle raw emissions and an engine configuration that is compatible with higher back-pressures (coming from a loaded particle filter). The diesel particle filter design implemented on this basis, together with the regeneration strategy developed, fulfil the exacting requirements of operators for compactness, operational safety, ease of maintenance and efficiency. In spite of the massive reduction of exhaust gas emissions, the excellent fuel consumption of the predecessor R43 has been retained. With the new engine design, MTU will continue to set the standard for diesel engines installed in main-line locomotives and shunters.


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    Titel :

    The nex generation of MTU series 4000 rail engines to comply with EUIIB emission legislation


    Beteiligte:


    Erscheinungsdatum :

    2010


    Format / Umfang :

    7 Seiten, 15 Bilder, 4 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch





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