Company History
| 1948 | License Agreement was executed between Harima Shipyard Co., Ltd., one of the former bodies of IHI and Sulzer Brothers, Ltd., Switzerland (present Winterthur Gas & Diesel Ltd. ). |
|---|---|
| 1957 | License Agreement was executed between Harima Shipyard Co., Ltd. and BBC Co., Ltd, Switzerland. |
| 1960 | Ishikawajima Heavy Industry Co., Ltd. and Harima Shipyard Co., Ltd. merged to form IHI |
| 1964 | License Agreement was executed between IHI and S.E.M.T. Pielstick (present MAN Diesel & Turbo) |
| 1980 | Certification was given by Japanese Government for manufacturing shop of internal combustion engines. |
| 1988 | Diesel United, Ltd. (DU) was established by merger of Diesel Engines Divisions of IHI and SHI. |
| 1989 | Diesel United Technical Service Co., Ltd. (DUS) established to enhance post delivery support |
| 1993 | DUS was merged into DU to unify diesel engine businesses. First 7RTA84T diesel engine was delivered. DU obtained certification for ISO 9001 for quality assurance and management concerning sales, design and development, production and servicing of reciprocating internal combustion engines. |
| 2000 | Total production of 10 million horsepower was achieved after the establishment of DU |
| 2003 | First 7RT-flex58TB diesel engine was delivered. |
| 2004 | First 12RT-flex96C diesel engine was delivered. DU obtained certification for ISO 14001 for environmental system. |
| 2005 | First RT-flex50 diesel engine was delivered. |
| 2006 | Naming of 2-stroke engines changed from "DU-SULZER" to "DU-WÄRTSILÄ". |
| 2007 | DU & Mitsubishi Heavy Industries Co., Ltd. agreed to business tie-up in the shipping diesel engine. |
| 2008 | We celebrated the 20th anniversary DU establishment. |
| 2009 | HAM (Humid Air Motor) System for diesel engines of a power plant began the operation. DU released TF-Detector (Trace-of-Ferrous-powder Detector). |
| 2011 | DU launched the first oversea office in Singapore (DUCS). DU released LC-A (LifeCycle Administrator). |
| 2012 | DU formed a business tie-up with Rong An and SOMEC. |
| 2013 | World's first RT-flex58T-D ER-3 engine was delivered. |
| 2015 | W6X72DF test engine was installed in Aioi Works. |
| 2016 | Naming of 2-stroke engines changed from "DU-WÄRTSILÄ" to "DU-WIN GD". |
| 2019 | IHI Group's Power Systems Business was integrated to form IHI Power Systems Co.,Ltd. |
| 2022 | IPS Aioi Co., Ltd., was established. |
| 2023 | IPS Aioi Co., Ltd., which took over the business related to large engines and related products and service that were absorption-split from IHI Power System Co., Ltd., transferred its shares to Mitsui E&S Co., Ltd. on April 1, 2023, and changed its name to Mitsui E&S DU Co., Ltd. |
