Page 36: of Maritime Reporter Magazine (July 1997)

Design And Development Of A

New V-Type Diesel Engine

When Ulstein Bergen was designing the BR engine in the mid-1980s, the company had start- ed with the intention of designing a series of in-line and V-versions which spanned the power range

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Circle 278 on Reader Service Card and shared efficiencies via com- mon components. However, the company astutely concluded that, at the time, neither company resources nor market demand war- ranted a full scale roll-out. To pre- pare for when the time would be right, studies were designed and the main principles and dimen- sions were laid down for a new V- engine based closely on the BR.

The engine embodies many important firsts for the Norwegian engine builder. It is the first V- engine from the company which features a single piece engine block, and it is, in fact, the most intricate block the company has ever designed. This is the first engine the company has created which was fully designed via a

CAD program, a fact which helped ensure further accuracy and effi- ciency.

Now the new engine is here - after having made its debut at

Nor-Shipping in Oslo — and it rep- resents the fulfillment of the V- engine project with a complete family of six, eight and 9-cylinder in-line engines, and 12, 16 and 18- cylinder V-engines in due course.

This development means that the company will soon offer a complete engine range between 2,600 and 7,800 kW at 720/750 rpm, running on diesel oil and heavy fuel.

The compact layout of Ulstein

Bergen's V-engine is intended for use in many advanced machinery arrangements, particularly where high powers are required, such as in many types of offshore supply vessels, large ferries, RoRos and cruise ships.

The BV-range at 720/750 rpm for 60/50 Hz offers high power with compact dimension, combined with vO

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Special design features include:

Fully bore-cooled combustion chamber components (new in that class) designed for opti- mum balance between ther- mal and mechanical loading;

A special injection pump base designed to avoid fuel leak- age into the lubrication sys- tem;

Cleaning/lubrication system for the fuel pump racks;

Features to accommodate future high ratings: an extra-strong fire deck in the cylinder head (80 mm thick) to enable high pressures; six cylinder-head studs to secure good sealing at such ratings, etc.

Technical Details

For ease of manufacture and repair, cooling water distribution is through large pipes along each cylinder bank. The same philoso- phy also lies behind the design of the main oil channel, which is com- prised of pipe sections supported in the main bearing walls.

The crankshaft is of the under- slung type, with large main bear- ing caps secured by vertical and (Continued on page 41)

A new engine from Ulstein.

Maritime Reporter/Engineering News