View non-flash version
Diesel Power Review —Krupp MaK (continued from page 32) and also as auxiliary marine en- gines. In addition to numerous marine diesel oil engines, more than 20 engines for operation on heavy oil have been sold to North Amer- ican shipping companies. This re- flects the great interest shown by American customers in heavy-oil diesel engines. G. Kuhl, president of Krupp MaK Diesel Inc., points out that his company has always stood by its product and given its custom- ers efficient after-sales service. In Chicago, close to the world's busiest airport, Krupp MaK set up its sales and service center, including a comprehensive spares depot. Advisory and after-sales service for customers is in the hands of MaK's own specialists, who have many years' experience with MaK engines. Krupp MaK supplies heavy-oil engines in the output range from 740 kw (990 bhp) to 9,000 kw (12,070 bhp). The M 331/332' 282 engines, with configurations of 6, 8, or 12 cylinders, has a bore of 240 mm and output range from 740 kw to 2,200 kw. The M 452 / 453 model, with 320-mm bore and power output from 880 kw to 4,800 kw, is manufactured with 6, 8, 9, 12, or 16 cylinders. With the same cylinder configuration, the M 551 552 has a bore of 450 mm and output from 3,200 kw to 9,000 kw. The biggest engine in the line, the 580-mm bore M 601, is provided in 6, 8, or 9 cylinder versions with output ranging from 6,000 to 9,000 kw. MaK diesels work on the 4- stroke principle and are manu- factured as in-line and V-type en- gines. All MaK engines are dis- tinguished by their robustness and low specific load characteris- tics. The mean pressures of all the engines lie below 18 bar. Ex- cept for those with a 240-mm bore, they have multi-section en- gine blocks with tension-rod as- sembly and embedded crank- shafts. The structural compo- nents enclosing the combustion chamber are specially designed for heavy-oil operation. Outstand- ing features include high resist- ance to wear and to high- and low-temperature corrosion, and low component temperatures through intensive cooling. Other features include built-up pistons with steel crowns and hardened annular grooves; spe- cially designed piston rings with chromium-plated working sur- faces ; bath-nitrided liners with high resistance to wear and cor- rosion, with wear values below 0.01 mm per 1,000 hours; and intensively cooled exhaust with wear-resistant armoring, manu- factured by MaK to the highest possible standards and tested down to the last detail. MaK engines have proved re- liable in all applications. Krupp MaK is devoting particular at- 34 tention to the following objectives in the field of research and de- velopment: Further reduction of specific fuel consumption combined with reliable combustion of the lowest grade bunker fuels; Participating in working groups with the aim of obtaining resid- ual heavy oils suitable for ma- rine purpose; Improvements in bunker fuel operation by retaining the usual load characteristics and by in- tensive research into materials. For additional information on Krupp MaK engines, Write 62 on Reader Service Card M.A.N. The current oil market situa- tion requires engine builders to concentrate their efforts on de- signs with both low fuel con- sumption and the capability of running on heavy fuel oil. En- gines with a low fuel consump- tion and high heavy fuel oil com- patibility demand a high firing pressure mean effective pressure ratio. The engines included in the
