2) The Mitsui-MAN B&W NA turbo chargers are mounted on S,K,L-MC and S-MC-C type engines, and 81 sets were manufactured in 1998. The models of production are six types, including NA48/TO8, NA48/S, NA57/TM8, NA57/TO9, NA70/TO7 and NA70/TO9.
2.4.13 Mitsubishi Heavy Industries, Ltd.
(1) Development of new model
MHI has developed the UEC engine which is the only in-house large low-speed 2-cycle engine in Japan since 1955 throughout the over half century. The line-up of the UEC-LS II series engines has been already completed, and the development of the UEC52LSE type engine is underway as the latest one.
Table 2.4.12-1 indicates the principal particulars of UECLS II type engines and UEC52LSE type engine.
The UEC52LSE type engine under development is designed for higher output and miniaturization compared with the LS II type engine, and has the top level specifications as the large low-speed 2-cycle engine of 19bar in brake mean effective pressure and 8.5m/s in mean piston speed.
(2) Annual results of manufacture
1) Main engines for marine use
Large engine 29 sets 821,420PS
Medium/small engine 8,937 sets 5,587,834PS
2) Auxiliary engine for marine use
Total number of engines 1,661 sets
2.4.14 Yanmar Diesel Engine Co., Ltd.
(1) Development of new model
Engines developed in fiscal 1998 by Yanmar are following 2 models. One is 6LY-ST type engine in a small marine engine group whose bore is 100mm or less, and the other is 6NY-16 (A) type engine in a large engine group whose bore is over 151mm.
1) 6LY2-ST type engine
On the basis of the current light and high-power 6LY type engine for marine use, 6LY2-ST type engine, whose bore size was enlarged by removing the sleeve, was developed for the pleasure or business application in Japan and the power boat in foreign countries.
