UEC52LSE, the Latest Model of Mitsubishi Diesel Engine
Mitsubishi Heavy Industries, Ltd. (MHI) started development of the new LSE series engine after completion of the LSII series engine. While maintaining high reliability, we implemented the compact design principles from our small engine development (that of the UEC37LSII). It is a high output engine with economic benefits for the manufacturer, the shipbuilder, and the engine operator. This excellent engine is designed to meet increasing requirements for environmental protection and electronic information transfer in the future.
The first model developed in this new series is the UEC52LSE. Its output is most suitable for 74,000-75,000 DWT PANA MAX BULK. Table 1 shows the main particulars of the engine. Fig. 1 shows a cross-section of the engine.
This is a high output engine with an approximately 15% higher output ratio than the current 50LSII engine. To achieve the same fuel consumption as the 50LS II engine, the maximum pressure in the cylinder was raised to 153kg/cm2. This is also a low fuel consumption engine.
This engine was designed to reduce the number of parts by 25% in order to improve reliability and maintainability. The turbocharger is installed at the aft end to minimize the installation space. In addition, rigid and compact blocks are used to house to turbocharger and the air cooler, with the space above the air cooler is left open for maintenance. In the exhaust manifold, the punching plate that absorbs thermal deformation has been shortened, without any reduction in strength. Thus, a low vibration engine design with high rigidity of the exhaust manifold has been achieved.
Along with the high output of the engine, the thermal load on components in the combustion chamber may incresase due to a higher brake mean effective pres-sure. Mechanical stress on parts may also increase due to a higher maximum pressure. For this engine, the state-of-the-art simulation technologies mentioned previously were used to achieve the same level of temperature and stress on each part as in conventional engines. MHI believes that this engine can establish a solid reputation for reliability, which has been already acclaimed in our conventional engines, especially for the combustion chamber parts, such as rings, liners, and exhaust valves.
Mitsubishi Heavy Industries, Ltd.
Diesel Engine Sales Department, Power Systems Headquarters
Address: 5-1 , Marunouchi 2-chome, Chiyoda-ku, Tokyo 100-8315
Tel: +81-3-3212-9080 Fax: +81-3-3212-9779 URL: http://www.mhi.co.jp/
