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Hybrid powerpacks for combat vehicles of the future

10-cylinder, over 1,100kW power output version of the mtu Series 199 engine introduced

Posted on 29 Jun 2024. Edited by: Tony Miles. Read 1808 times.
Hybrid powerpacks for combat vehicles of the futureRolls-Royce’s Power Systems division is expanding its mtu engine programme for military land vehicles to include a hybrid powerpack for special tactical requirements — a 10-cylinder, over 1,100kW power output version of the mtu Series 199 has already proved itself with NATO forces.

Dr Jörg Stratmann, Rolls-Royce Power Systems CEO, said: “This underlines the importance we attach to our partnership with NATO countries and their allies in safeguarding their security interests. Because cooperation with the security authorities is one of Rolls-Royce’s strategic initiatives, we will continue to be a reliable partner as a supplier of propulsion systems for military vehicles with our decades of technological expertise. Last year, at its Capital Markets Day, Rolls-Royce highlighted the governmental business within Power Systems as an area of future near-term growth through investment and expanding the scope of its products, including providing more integrated solutions.”

Knut Müller, senior vice president of Global Governmental Business at Rolls-Royce Power Systems, said: “Future armoured military land vehicles will require more power for propulsion and on-board power supply for the electronic systems. At the same time, they will be designed for a different tactical approach in the field. Our future mtu propulsion solutions for this application take both of these requirements into account.”

Highly integrated propulsion system

Electrification and hybridisation 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 maximise 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.

Rolls-Royce mtu propulsion concepts for militaryFor 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 refuelling the vehicles are optimised.

The advantages of ‘mild’ hybridisation 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 customised 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.

Defence capabilities of NATO

Christian Wolf, head of development for Military Engines and Systems at Rolls-Royce Power Systems, said: “This propulsion concept will expand the operational possibilities of future tracked armoured vehicles in a way that was previously hardly imaginable. We are convinced that we are making an important contribution to the further development of the defence capabilities of NATO and its allies. For the first time, vehicle manufacturers will be able to realise completely new vehicle concepts, whereby the hybrid concept can in principle be implemented with any engine series from the mtu military propulsion programme.”

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 six- and eight-cylinder models of the mtu Series 199, which have made the Series 199 the best-selling engine series for military vehicles in its class. It features: high power density with a small design volume; fast response behaviour; 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.

Mr Müller concluded: “With this engine, which is based on a commercial basic engine, we are helping to meet the increased requirements for national and alliance defence in a cost-efficient manner.”