Ever since 1982, when the first MC engine was introduced, the engines have gone through a long and stable development so as to be able to always fulfil the requirements from the market. Not only with regard to increased power and lower fuel consumption and emissions, but also with regard to optimised design, taking cost, production, reliability as well as service and maintenance into consideration. More than 17000 MC engines have been ordered since 1982. The MC-C and ME/ME-C versions were introduced in 1996 and 2003, respectively, and they have superseded the MC version as more modern versions of the very reliable MC engine design. This paper will deal with the latest developments of the MC engine; namely the ME-B8/9 engines and the 80 and 90 bore ME-C9 engines, for which service experience is now already available for K80MEC9, S40ME-B9 and S35ME-B9. These two engine designs have been optimised, utilizing the experience from earlier designs, as well as introducing brand new construction principles, for instance, the new horizontal main bearing assembly, the integrated scavenge air receiver, the integrated auxiliary blower and single-wall piping for the hydraulic oil supply. The engines have been uprated compared with previous designs. They are designed for the optimum propeller speed so as to increase propeller efficiency and, thereby, reduce fuel costs for the ship speed chosen. With more than 100 engines on order, the ME-B design has proved its worth, showing a great benefit for small-bore two-stroke engines with electronically operated fuel injection and camshaft-operated exhaust valve. From the above, it can be seen that the latest engine designs are only offered as electronically controlled versions, which from an overall cost point of view is the most economical solution when bearing in mind the Tier II regulations. However, if needed, the ME-C9 engines can also be designed as MC-C9/MCS9.
Product development of MAN B&W two-stroke diesel engines
2010
10 Seiten, 24 Bilder
Conference paper
Storage medium
English
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