View non-flash version
Over the past three years, Cum- mins has reduced the specific fuel consumption for these models an additional 2-3 percent. DAIHATSU DIESEL Circle 7 on Reader Service Card With its extensive experience in the marine field, Daihatsu has de- veloped a new type of engine, the DL series, which features low quality fuel burning, low load op- erability, and low fuel consump- tion. These DL series engines— DL-20, DL-26, DL-28, and DL-32— are a medium-speed type (600-1,000 rpm) with outputs covering the range from 750 to 3,000 bhp (550 to 2,205 kw). They are suitable for both main propulsion and auxil- iary generating roles. Severe tests and experiments under various conditions on all parts of these engines were carried out at the Daihatsu laboratory and factory before they were placed on the market. Daihatsu's tradi- tional design concepts—simple and sturdy construction, easy mainte- nance, and lower maintenance costs—are fully incorporated in the DL series engines. DETROIT DIESEL Circle 8 on Reader Service Card The Detroit Diesel Allison divi- sion of General Motors offers ad- vanced fuel economy models of its 149 Series diesel engines. The tur- bocharged and intercooled engines are said to be the most fuel-effi- cient heavy-duty diesels available in their power range. The Detroit 149 engines in 12- and 16-cylinder, V configurations are expected to show fuel economy improvements of about 3.5 percent over previous engines at the same horsepower ratings. The 12-cylin- der models are available up to 894 bhp, and the 16-cylinder versions up to 1,212 bhp. The fuel economy improvements are the result of a number of engineering develop- ments, including new turbochar- gers, unit fuel injectors, and a new airflow system. ELECTRO-MOTIVE DIVISION Circle 9 on Reader Service Card A new, more fuel-efficient ver- sion of the popular 645 Series die- sel engine was introduced in 1983 by the Electro-Motive Division of General Motors. Compared with previous 645 models, the new en- gine is said to provide a reduction in fuel consumption of about 3 percent. The new EC engine series com- bines innovative design features that insure superior performance, extended operating service, and enable the engine to withstand higher operating pressures with 32 state-of-the-art turbocharger tech- nology. The 645EC uses a 16:1 compression ratio piston, in- creased from 14.5:1, producing the same power output with less fuel. A newly designed impeller and compressor have been incorpo- rated into the turbocharger. Last year EMD also introduced a heavier crankcase option, the 645F engine. This engine, de- signed for high horsepower out- puts, is currently available in 16- and 20-cylinder models. GENERAL ELECTRIC Circle 10 on Reader Service Card GE's fuel-efficient, four-stroke 7FDM marine diesel engines now offer ratings from 1,525 to 4,000 bhp. The 8-cylinder model is rated 1,525 bhp at 900 rpm and 1,800 bhp at 1,050 rpm. The 7FDM 12-cylinder engines are rated at 2,550 bhp and 3,000 bhp at 900 and 1,050 rpm, respectively, while 16-cylinder engines carry ratings of 3,400 bhp at 900 rpm and 4,000 bhp at 1,050 rpm. Without efficient, dependable pumps, even their awesome weaponry can't assure them mastery of the seas.
