Rolls-Royce’s Power Systems division is expanding its mtu engine program for military land vehicles to include a hybrid powerpack for special tactical requirements and a 10-cylinder, over 1.100 kW power output, version of the mtu Series 199 which has been extremely successful with NATO forces.
Electrification and hybridization will give tactical vehicles new capabilities in the field. To this end, Rolls-Royce’s new mtu hybrid drive combines the advantages of a high-performance diesel engine with those of a battery-electric drive. The highly integrated propulsion system requires comparatively little installation space in the vehicle in order to maximize the volume available for equipment and crew. The core of the solution is a highly mobile and extremely compact drive solution, taking into account increasing cost pressure, tight budgets and the need for significantly larger vehicle fleets.
For quiet operation, for example in a concealed position, the high-performance batteries previously charged in diesel mode, supply the vehicle’s electrical and electronic systems. This is done without the noise and thermal footprint of the diesel engine - and over a longer period of time. This makes the vehicle more difficult to locate for enemy reconnaissance. The so-called “anti-idling” mode not only ensures better camouflage of the vehicle, but also significantly reduces fuel consumption when the vehicle is on standby. The range of the vehicles and the downstream logistics chain for refueling the vehicles are optimized.
The advantages of “mild” hybridization are demonstrated by the combined drive on slow journeys, when the vehicle tracks generate little noise. The noise generated by the drive is reduced to a minimum, making it considerably more difficult to detect the vehicle. Rolls-Royce uses a specially developed and customized silencer in combination with the hybrid main propulsion. In combined operation, the electric propulsion also serves as a booster for highly dynamic acceleration, noise-reduced low-speed driving or even high-speed driving.
The mtu Series 199 with outputs from 260 to 800 kW is well known in many military land defiance program and has proven itself in all extreme climatic conditions in more than 15 countries. With the future 10-cylinder variant, the concept of which is being presented at the Eurosatory defense trade fair, the 199 series will cover a power range of up to 1.100 kW and will also be able to power vehicles weighing 50 to 70 tons. The logistical uniformity, with identical components within this engine family from the 6-cylinder to the 10-cylinder variants, will help the armed forces to significantly reduce their logistics costs.
Thanks to the modular design principle of the mtu Series 199 and its compact dimensions, the 10-cylinder engine can be used not only for new vehicles but also for the repowering of existing vehicles. The 10-cylinder version will set new standards in terms of power density, compact design and, above all, already available add-on parts such as hydraulic units, air compressors and generators for power generation. This will significantly simplify vehicle integration into a Powerpack.
The 10-cylinder engine has numerous product features in common with the 6- and 8-cylinder models of the mtu Series 199, which have made the Series 199 the best-selling engine series for military vehicles in its class: high power density with a small design volume; fast response behavior; configurable according to vehicle requirements, for example with a generator or other add-ons; a wide range of options for power take-offs (so-called PTOs); and low lifecycle costs due to long maintenance intervals.
