Page 39: of Maritime Reporter Magazine (November 2004)

The Workboat Annual

The New Wartsila 46F

The Wartsila 46F is the latest in the marine engine series launched in 1987.

Though visually similar to the original

Wartsila 46, with similar bore and stroke, the Wartsila 46F is a new engine with the latest technology applied to all major components, including common rail injection and scaleable embedded control, for high performance and record-low exhaust emissions, regard- less of fuel quality.

The new engine initially covers the output range from 7,500 to 11,250 kW at 600 rpm in 6-, 7-, 8- and 9-cylinder in- line configurations.

The higher (1,250 kW cylinder) output of the Wartsila 46F compared to the original Vasa 46 has been achieved by increasing engine speed instead of mean effective pressure. In full-load opera- tion, early closure of the inlet valves makes it possible to use a low effective compression ratio, resulting in a work- cycle characterized by low combustion air temperature, which is designed to keep the rate of NOx formation low.

In keeping with tradition, the Wartsila 46F has modular built-on systems and features such as lubricating oil module with oil cooler and filter, crankshaft driven lubricating oil pump and cooling engine's compact design; the new water pumps, and thermostatic valves. Wartsila 46F has the same outer dimen-

Besides minimizing installation cost, sions as the Vasa 46 despite its consider- built-on modules are the key to the ably higher power output. (Continued on page 43) $&OmniTHRUSTHtM

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November 2004

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