MAN D3876 Ensures High Thrust and Future-Proofing in PistenBully 800


MAN Engines now supplies Kässbohrer Geländefahrzeug AG with MAN D3876 engines for the PistenBully 800. The basis for the delivery of the engine was the further development and adaptation of the MAN D3876 to the extreme working environment of the new high-performance snow groomer.

“We have also modified our high-performance MAN D3876 for the PistenBully 800 for cold-start capability, use up to 2,500 m in altitude without power reduction and extreme lean angles,” said Werner Kübler, head of Engineering MAN Engines.

“Our PistenBully 800 sets new standards in slope preparation. The MAN D3876 and the MAN Engines development team have made an important contribution to this,” added Michael Kuhn, head of Development at Kässbohrer Geländefahrzeug AG.

In addition to the MAN D4276 on the same platform, the MAN D3876 is the most powerful I6 engine in the portfolio of MAN Engines. With a displacement of 15.3 l, the engine in the PistenBully 800 offers a whopping 2,900 Nm (2,138 ft lb) of torque and 450 kW (612 hp). As a result, the currently most powerful PistenBully in the series portfolio achieves a unique thrust for the preparation of slopes.

The variable turbine geometry (VTG) turbocharger optimizes the dynamic response in the off-road-specific speed ranges. In addition, it produces maximum power and torque over a wider rpm range. This means a constant thrust performance, especially on steep slopes and in changing conditions. In order to ensure the cold-start behavior even at temperatures as low as -30°C, the combustion behavior was also modified when starting the engine.

For work at high altitudes, MAN engineers had to adapt the charge air components to the thinner air at high altitudes. In addition, they optimized the oil pan and oil pump of the MAN D3876 to work at lean angles of up to 45° on all sides.
“Our MAN D3876 is precisely tailored to the PistenBully 800 and its requirements. At MAN Engines, we benefit from decades of application-specific engine development for a wide range of applications as well as the large-scale production experience of our parent company MAN Truck & Bus,” said Mr. Kübler.

All D3876 engines are equipped with a common rail injection system that operates at an injection pressure of 2,500 bar. This makes it one of the systems with the highest pressures on the market and guarantees optimum fuel atomization quality. As a result, significant savings in fuel consumption can be achieved.

“Our development goal has always been to achieve the best fuel consumption. This saves the operator costs and also reduces the CO2 emissions of the engines,” added Werner Kübler. “Specifically, the MAN D3876 in the PistenBully 800 offers 1/3 more thrust than all snow groomers currently available on the market. At the same time, it saves up to 9% fuel per cubic meter of shifted snow and emits correspondingly less CO2.”

Equipped with the latest exhaust technologies, the MAN D3876 complies with the current emission regulations. In addition, the engine is approved for operation with HVO (hydrogenated vegetable oil), also known as regenerative diesel – according to the EN15940 standard. Customers can use it to replace conventional diesel fuel – or even mix it – with no performance losses or disadvantages with regard to the service and maintenance intervals. Regenerative diesel ensures clean combustion with up to 90% less greenhouse gas emissions (CO2) in the exhaust gas compared to conventional diesel.

In order to be able to completely dispense with CO2 emissions in the future, MAN Engines already has concepts for a pure hydrogen combustion engine for off-road applications. The MAN H4576 is based on the basic engine of the MAN D3876 and uses the same installation dimensions, so that it can replace the diesel engine in the PistenBully 800 in due course.

“We are well prepared to integrate hydrogen combustion engines into off-road applications. When the market is ready, MAN Engines will offer the right solutions,” said Mikael Lindner, head of MAN Engines.

The MAN D3876 was introduced in 2014 as a completely new engine series. This 15.3 l I6 has replaced the previous 16.2 l V8 engine in commercial vehicles and off-road applications.

Source: MAN Truck & Bus

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