Page 30: of Maritime Reporter Magazine (October 15, 1981)

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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

Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.