Diesel United, Ltd. -
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Diesel United, Ltd. (DU) was born in 1988 as a result of the merger between the diesel engines divisions of Ishikawajima-Harima Heavy Industries Co., Ltd. (IHI.) and Sumitomo Heavy Industries, Ltd. (SHI). Those two companies had entered into licence agreements with then Sulzer Brothers Ltd., Switzerland in 1948 and 1950 respectively. During the past 60 years, DU built a large number of Sulzer and Wärtsilä engines for various types of ships such as VLCCs and container ships. The production included many world first production engines of new engine types. As far as two-stroke diesel engines are concerned, DU is unique in that it has, unlike other licensed engine builders, been producing only Sulzer/Wärtsilä engines under a single licence.
DU has the capability of producing engines in a bore range of 48 to 96 cm.
The annual production capacity of Diesel United, Ltd. stands at 1,000,680 bhp.
DU will aggressively promote RT-flex engines, which are fuel economical and environmental friendly, to meet the needs of customers for today and in the future. To that end DU will exploit all its technical resources to enhance the reliability and competitiveness of RT-flex engines. It is anticipated that this will naturally result in the return of customers and local shipyards which had previously used DU-built Sulzer engines.
Hitachi Zosen Diesel & Engineering Co., Ltd. -
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Hitachi has a 100 years history. About ten years ago, Hitachi moved its engine production from Osaka to Ariake on Kyushu island. A new engine production works including erection/test shop was opened there in 1997 close to the Ariake shipyard of Universal Shipbuilding Corporation. At present the annual production capacity is 50 low- speed marine engines with a potential of increasing the production volume. Beside low-speed diesel engines Hitachi produces also gas turbines and nuclear power plant equipment. For Wärtsilä engines Hitachi is currently focusing on producing the RT-flex50 engine type.
Mitsubishi Heavy Industries, Ltd. -
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Mitsubishi was established in 1905 and grown to become one of the largest companies in Japan with a great variety of products. In 1916 Mitsubishi manufactured its first diesel engines. It is the longest-established current licensee of Wärtsilä, having it first licence for Sulzer diesel engines in 1925. Since then it has manufactured a large number of Mitsubishi-Sulzer low-speed engines and now Mitsubishi-Wärtsilä engines right up to the latest RT- flex96C. Independently Mitsubishi developed its own Mitsubishi UEC low-speed marine diesel engines.
