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eludes the model MD 120A, a 6- cylinder engine with maximum continuous rating of 168 bhp at 1,800 rpm, and the 6-cylinder TMD 120A with mcr of 260 bhp at 1,800 rpm. WARTSILA DIESEL Circle 94 on Reader Service Card Wartsila Diesel, one of the world's leading manufacturers of medium-speed diesel engines, has three production plants: the Wart- sila Vasa factory in Finland, the Trollhattan factory in Sweden, and the recently opened Wartsila Power Singapore in Singapore. Wartsila's product development program focused on the design of diesel engines capable of both maximum economy and safe oper- ation even in the most demanding applications. As a result, the com- pany now produces two high- standard, medium-speed engines designed and developed from the very beginning to operate on the poorest quality fuel. The Vasa 32 engine is well es- tablished in the world's marine market, and is installed as the main or auxiliary power source on a variety of ships. This engine, with its seven different cylinder versions—4R32, 8R32, 9R32, 12V32, 16V32, and 18V32—covers an output range from 1,820 to 8,350 bhp at 720 to 800 rpm. The Vasa 32 can operate on fuel with a viscosity up to 380 cSt. The second of the company's heavy fuel engines is the Wartsila Vasa 22HF, said to be the smallest engine in the world developed ex- clusively to operate on heavy fuel. The output range of the 22HF cov- ers 720 to 3,480 bhp at 900 to 1,200 rpm. This engine is avail- able in five different cylinder con- figurations—4R22HF, 6R22HF, 8R22HF, 12V22HF, and 16V22HF—and can run on the same viscosity fuel as the Vasa 32, 380 cSt. Main features of these engines are: starting, running, and stop- ping over the entire load range on heavy fuel without any limita- tions; heavy fuel operation with the same safety and reliability as when operating on distillate fuel; and all engines can run on the same type of heavy fuel. The ability to burn heavy fuel successfully lies in a purpose-de- signed diesel engine and fuel-han- dling system. Wartsila's heavy fuel engines feature: increased pre- heating of the engine before start- ing, including jacket water, lube oil, charge air, fuel system on both the high- and low-pressure side, and fuel nozzles; increased filter capacity of both fuel oil and lube oil; higher temperature and im- proved insulation of the injection pump control system. Since 1980 Wartsila Diesel has been represented in the U.S. by Wartsila Power Inc., headquar- tered near New Orleans, with branch offices in New York, Hous- ton, and Seattle. WAUKESHA Circle 78 on Reader Service Card Waukesha Engine Division's AT25 Series 250-mm bore, me- dium-speed diesels operate eco- nomically and efficiently on heavy fuels. These high-output engines, built under a license agreement with Sulzer Bros. Ltd., are avail- able in 6- and 8-cylinder in-line and 12- and 16-cylinder V models with a power range from 1,260 to 4,800 bhp (941 to 3,581 kw) at 720 to 1,000 rpm. Enginator® electric generating systems are rated to 3,040 kw, 60 Hz at 900 rpm. The AT25 was designed specifi- cally with heavy fuel operation in mind. The bore-cooled cylinder head and two-part piston insure lower induced stresses and moderate valve seat temperatures. Com- pared with the double-bottom cyl- inder head design used for most engines of this type, deformations with the bore-cooled head are 2% times lower. In particular, this means greatly improved valve sealing conditions. Also, the use of valve rotators insures uniform temperature distribution, result- ing in full-load valve seat temper- atures of only 788 F (420 C)—im- portant when running on heavy fuel. Designed with a high degree of (continued on page 40) The Tri-Feature"DL Series" New Technology from Daihatsu. Daihatsu Diesel Engines—a stroke ahead. DAIHATSUIDAIHATSU DIESEL (USA), INC. SPARE PARTS, ENGINEERING SERVICE FOR DAIHATSU ENGINES 1211 Avenue of Ihe Americas (41 Fl.) New York, NY 10036 DAIHATSU DIESEL MFG. CO., LTD. Tlx WU 126110 NISROCK NYK TWX 710-581-6252 NISROCK NYK D Osaka. Tokyo, London. Singapore. Sidney, Jakarta Phone: 212-730-2102 / 2257 In response to modern demands for fuel conservation, Daihatsu has developed the DL Series Tri-Feature Diesel Engine. The DL Series is designed for improved combustion efficiency at low load, easier start-up and higher durability, with future fuel trends also taken into consideration. All these characteristic improvements are test verified. January 15, 1984 Circle 179 on Reader Service Card 39
