The emissions regulations continue to tighten with new particulate level proposals expected in 2007 from IMO. Some territories such as the California and Alaska coastal authorities, along with Hamburg and Rotterdam ports are already imposing fines for visual smoke emissions. Wärtsilä has over 350,000 operational hours experience reported in May 2006 from 4 stroke engines, with its smokefree modular HFO common rail systems. This paper describes the operation experiences and recent development achievements. In detail the paper describes the two stage injector control W32CR injection system field operational experiences and the developments to increase component lifetime, and consistency over time. In addition, the Waertsilae developed W38CR, W46CR & W46FCR systems operational experiences are described, and the new generation equipment is introduced. Such items as the use of ceramic materials for abraisive wear resistance is highlighted for key component functions. Another important feature of a Common Rail fuel injection system which will also be highlighted, is the possibility to employ multiple operating maps as a function of e.g. fuel specification and ambient conditions. The key to this is naturally the electronic control system which has been developed with emphasis on ultimate redundancy. Latest CR engine performance with alternative fuel types is shown. Design of a rate shaping device has been created. Laboratory engine experiences with various forms of injection rate shaping is further evaluated and will be described in this paper. For the near future, the architecture of Wärtsilä's latest W20 CR system is introduced.
Common rail experiences and new developments - 4 stroke Wärtsilä engines
2007
16 Seiten, 42 Bilder, 1 Tabelle, 3 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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