The Mitsubishi KU 44 high-power diesel engine has been developed for an output range between 10 to 17 MW, based on the operating results of the KU 30 and KU 34, more than 200 sets of which have been delivered to domestic and foreign plants. The design of the KU 44 basically follows the lines of the KU 30 and KU 34, but a BMEP of 2.55 Mpa at an engine speed of 514 rpm has been achieved to realize good fuel economy. The KU series diesel engines now cover the output range from 3 to 17 MW since introduction of the KU 44.