Mitsubishi Heavy Industries Ltd. (MHI) began to develop electronically controlled diesel engines as early as 1988. Over a long period, the fundamental system was verified on single-cylinder research engines, the NC45 (45 cm bore) and the NC33 (33 cm bore), at our Nagasaki Research & Development Center. The 7UEC33LSII, a stationary diesel generator set at the MHI Kobe Shipyard & Machinery Works, was converted to the first full-scale Eco-Engine as a demonstrator in December 2001, and has been proving its reliability over the last four years including various operation tests. This engine was actually a conventional engine retrofitted with an electronic control system. Based on that engine's performance, we held shop tests for the first commercial engine, 8UEC60LSIIEco. This engine's body was manufactured by Kobe Diesel Co., Ltd, the controller unit and solenoid valve units were built by Nabtesco Corporation, and the Eco-Engine devices were manufactured and assembled by MHI. The engine began its service as the main engine for the pure car and truck carrier 'LYRA LEADER', built by Shin Kurushima Dockyard Co., Ltd, and Toyohashi Shipbuilding Co., Ltd, for Nippon Yusen Kaisha in August 2005. The first 8UEC60LSII-Eco, mounted in the 'LYRA LEADER' has been performing to a very high standard in actual service and some initial problems were already identified and solved. Users of the engine admire the system's reliability, the fact that it produces invisible smoke at start and during operation, stable starting, and stable engine revolution in rough weather. Furthermore, we have confirmed that this engine's operating costs, including fuel oil consumption, are lower than those of conventional engines. The Industrial Maritime Organization (IMO) is now conferring the second emission regulation, and in near future PM or other physical matters will also is regulated in addition to NOx and SOx. Moreover, the regulations will be stricter. Looking beyond these regulations, MHI is examining a water-injection system, an aftertreatment device, and so on, as further measures. By electronically controlling fuel injection, opening and closing of the exhaust valves, at accurate engine crank angle, we consider that it will be possible to obtain optimal performance of the water-injection system and the aftertreatment device. In addition, based on the above requirements, we believe that it will be necessary to improve the engine's performance and reliability, and to make the system easier to operate and lower its operating costs for customers. These can be achieved by simplifying the system while retaining its fundamental functions, and by developing new functions such as recommending appropriate action to operators in abnormal conditions. In this report, we introduce some major test results of the first Eco-Engine from both shop tests and sea trial, and reaffirm 'ecology,' 'economy,' 'easy control,' and 'excellent engine condition' as the development concepts. Furthermore, we discuss the approach toward improving the system using other devices, aside from improving the system itself.


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    Titel :

    Creating a whole range of benefits with the Mitsubishi UEC Eco-Engine


    Beteiligte:
    Sugihara, Masahide (Autor:in) / Edo, Koji (Autor:in) / Tanida, Takuma (Autor:in)


    Erscheinungsdatum :

    2007


    Format / Umfang :

    10 Seiten, 24 Bilder, 5 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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