Development of electronically controlled engine "Mitsubishi UEC Eco-Engine"

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Development of electronically controlled engine "Mitsubishi UEC Eco-Engine"

Sakaguchi, Katsuhiko / Sugihara, Masahide

At present, diesel engines are facing new important issue, environmental friendliness, and most technological efforts have been concentrated on this issue. Mitsubishi Heavy Industries, Ltd. (MHI) has completed the development of the electronically controlled engine, the UEC Eco-Engine, to achieve environmental friendliness in addition to high performance and reliability in any operating condition. The Eco-Engine is driving fuel injection pump, exhaust valve, starting air valve, and cylinder lubricator with electronic control system. The UEC Eco-Engine can bring less operating cost and stable operation in addition to reduction of NO(x) emission and smokeless operation. The fundamental mechanism of the electronically controlled engine has been verified on single-cylinder research engines (NC33 and NC45) at MHI Nagasaki Research & Development Center since 1988. The prototype system has been under commercial running on the 7UEC33LSII-Eco as a stationary diesel generating set at MHI Kobe Shipyard & Machinery Works over two and a half years with very good service experience. In this paper, the authors introduce the system construction, the development concepts, and major test results on research engines and the first full-scale Eco-Engine.