MAN Engines is presenting the “MAN D3872 LE432” workboat engine with a displacement of 30 litres for the first time at the SMM shortly before the start of series production.
The V12 engine on display delivers 1,213 kW (1,650 hp) at 2,100 rpm and is designed for medium-duty applications such as wind farm supply vessels (WSV), ferries, passenger ships and fishing boats. Further power variants (1,471 and 1,618 kW or 2,000 and 2,200 hp at 2,300 rpm) for light applications have already started production.
According to the company, this is a completely new basic engine that benefits from the knowledge gained from the current “MAN D2862” V12 engine series, which has been established for many years. Numerous measures have been taken to guarantee the MAN premises of durability, reliability and future viability. For example, the new engine benefits from an improved coolant supply thanks to a new coolant pump and a new thermostat housing, which contribute to the engine’s long service life. Alternatively, the engine is available with an outer skin cooling system instead of a closed cooling circuit.
A new engine control unit achieves optimum engine tuning
The distinctive cylinder head has also been redesigned to optimize flow and cooling. In addition, the oil supply has been adapted by using flow-optimising measures alongside new oil pumps and new oil coolers. The new common rail injection system is another important step for this next generation of engines: with an injection pressure of 2,200 bar, the basis is created for achieving the low fuel consumption and excellent raw emissions that MAN engines are known for. The new MD1+ engine control unit also achieves optimum engine tuning.
Another development goal was the high power density, so that the most powerful variant “MAN D3872 LE433” with 1,618 kW (2,200 hp) and a dry weight of only 2,720 kg achieves 54.7 kW per liter of displacement. The developers at MAN Engines were able to retain the connection dimensions of the V12 engine with a displacement of 24.4 litres as well as the compact installation dimensions of 1,153 mm width and 1,320 mm height. Only the length has been increased by an additional 100 mm to 2,335 mm. In conjunction with the likewise very compact and flexibly configurable exhaust gas aftertreatment system, the MAN Engines system offers clear advantages for both new builds and remotorisation projects.
Numerous bench tests were part of the development at MAN Engines
The development of the engine over several years included numerous bench tests with correspondingly long operating times and additional successful tests with customers in water applications. In addition, the stationary gas engine with the same basic drive unit is already running extremely successfully in series production and is proving itself in the field of power and heat generation. In the medium term, further power gradations are planned for the marine engine – including for heavy-duty applications – in a wide range of emission levels.
The engine not only currently complies with current emissions regulations, but is also already technically designed for use in the MAN Smart Hybrid Experience. In addition, the engine – like all engines in the current portfolio – is approved for use with regenerative (renewable) diesel in accordance with “EN15940” in Europe and the US specification “ASTM D975” from the American Society for Testing and Materials (ASTM).
With the new 30-litre engine, MAN Engines is significantly expanding its engine portfolio in terms of power and displacement. This means that in-line six-cylinder, V8 and V12 engines from 147 to 1,618 kW (200 to 2,200 hp) with a displacement of 12.4 to 29.6 litres are currently available for light, medium and heavy-duty applications.
